Carbon Dioxide Information Analysis Center - ACRONYMS AND ABBREVIATIONS

Contents taken from Global Change Acronyms and Abbreviations, 1995. ORNL/CDIAC-83, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee. Edited by: Cindy T. Woodard and Frederick W. Stoss.

Can't find an acronym you're looking for in our listing? Try the listing, and additional links, maintained by the U.S. Global Change Research Information Office.

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z

A

A-S		Arakawa-Schubert
A-SAR		Advanced Synthetic Aperture Radar
A-SCAT		Advanced scatterometer
A%C		Animal population ratio living in cool climate region
AA		atomic absorption
AAAS		American Association for the Advancement of Science
AABW 		Antarctic Bottom Water
AAF		Association Aeronautique et Astronautique de France
AAG		American Association of Geographers
AAIW 		Antarctic Intermediate Water
AAOE		Airborne Antarctic Ozone Experiment
AARI 		Arctic and Antarctic Research Institute (Russian Federation)
AAS		atomic absorption spectrometry (spectrometer, spectroscopy)
AASE		Airborne Arctic Stratospheric Expedition
AASP		American Association of Stratigraphic Palynologists
AASSREC		Association of Asian Social Science Research Councils
AATSR		advanced along-track scanning radiometer
AAWORD		Association of African Women for Research and Development
ABE		Advisory Board on Energy (India)
ABL		atmospheric boundary layer
ABLE		Atmospheric Boundary Layer Experiment
ACA		Advanced Computer Applications (project)
ACABQ		Advisory Committee on Administrative and Budgetary Questions
ACARS		Aircraft Communication and Recording System
ACARS		ARINC Communications and Reporting
		System
ACAST		Advisory Committee on the Application of Science and Technology to
		Development (UN)
ACATS		Airborne Chromatograph for Atmospheric Trace Species
ACC		Administrative Coordination Committee (ECOSOC)
ACC		Air Combat Command (formerly TAC)
ACC		Antarctic Circumpolar Current
ACCI		Advisory Committee on Climate Applications and Data (WMO)
ACCLAIM		ACC Levels by Altimetrics and Island Measurements
ACCM		Atmospheric General Circulation Model
ACCP		Atlantic Climate Change Programme
ACD		Aeronautical Charting Division (NOS)
ACE-1		Southern Hemisphere Marine Aerosol Characterization Experiment (IGAC)
ACE-2		North Atlantic Regional Aerosol Characterization Experiment (IGAC)
ACE		Advisory Committee on the Environment (ICSU)
ACE		Aerosol Characterization Experiment (IGAC)
ACE		Atmospheric Chemistry Education in Global Change (IGAC)
ACGIH		American Conference of Governmental Industrial Hygienists
ACH4		Annual methane (CH4) emission from enteric fermentation
ACHEX 		Aerosol Characterization Experiment
ACID		Acidification Chemistry Information Data Base (BNL)
ACL		alternate concentration level
ACM		advanced climate model
ACMAD		African Centre of Meteorological Applications for Development
ACP		Atmospheric Chemistry Program (DOE)
ACR		active cavity radiometer
ACRIM		active cavity radiometer irradiance monitor
ACS		American Chemical Society
ACSM		American Congress of Surveying and Mapping
ACSYS		Arctic Climate System Study (WCRP)
ACTM		Atmospheric chemical transport model
ACTS		African Centre for Technology Studies
A.D.		anno Domini
ADAAC		Affiliated Distributed Active Archive Center
ADALT		Advanced Radar Altimeter
ADB		Asian Developing Bank
ADC		Affiliated Data Center
ADCLS		Advanced Data Collection and Location System
ADCP 		Accoustic Doppler Current Profiler
ADDNET		Acid Deposition Data Network (EPA)
ADEOS		Advanced Earth Observation Satellite (Japan)
ADEOS		Advanced Earth Observing System
ADMC		Agri-residue dry matter content
ADP		automatic data processing
ADPE		automatic data processing equipment
AE		Atmosphere Explorer
AEC		U.S. Atomic Energy
		Commission (now DOE)
AEDD		Arctic Environment Data Directory
AEEI		Atmospheric Emitted Radiance Instrument
AEEI		Autonomous energy-efficiency index (improvements)
AEF		Average emission factor
AER		Atmospheric and Environmental Research, Inc. (Cambridge, Massachusetts)
AER		atmospheric and environmental research (DOE)
AERI		Atmospheric Emitted Radiance Instrument
AERI		Atmospheric Emitted Radiance Interferometer
AERI-FEP	AERI Front End Processor
AEROCE		Atmosphere/Ocean Chemistry Experiment
AES		Atmospheric Environment Service (Canada)
AEST		Australian Eastern Standard Time
AET		actual evapotranspiration
AF		Agri-residue used for animal feed
AFBC		Atmospheric Fluidized Bed Combustor
AFDM		ash free dry mass
AFEAS 		Alternative Fluorocarbons Environmental Acceptability Study
AFGL		Air Force Geophysics Laboratory
AFGWC		Air Force Global Weather Central (U.S.)
AFR		Africa
AFS		American Fisheries Society
AGA		American Gas Association
AGAGE		Advanced Global Atmospheric Gases Experiment
AGAL		Australian Government Analytical Laboratories
AGASP		Arctic Gas and Aerosol Sampling Programme
AGBD		Above ground biomass density
AGCM		Atmospheric General Circulation Model
AGID		Association for Geoscientists for International Development
AGL		above ground level
AGU		American Geophysical Union
Agr.		Agriculture (USDA)
AGRHYMET	Agronmeteorology and Operational Hydrology and Their Applications
AGU		American Geophysical Union
AGWAT		Agriculture and Water Project (JECOR)
AGWP 		Absolute Global Warming Potential
AH		Air Heater
AIAA		American Institute of Aeronautics and Astronautics
AIBS		American Institute of Biological Sciences
AIChE		American Institute of Chemical Engineers
AICRIP		All India Coordinated Programme for Rice Improvement
AID		Agency for International Development (U.S.)
AIDJEX 		Arctic Ice Dynamics Joint Experiment
AIHA		American Industrial Hygiene Association
AIJ		Activities Implemented Jointly
AIM		approximate inertial manifold
AIM 		Asian-Pacific Integrated Model
AIME		American Institute of Mining and Metallurgical Engineers
AIP		Algorithm Intercomparison Programme
AIP-1		Algorithm Intercomparison Project-1
AIP-2		Algorithm Intercomparison Project-2
AIP-3		Algorithm Intercomparison Project-3
AIREP		Aircraft Weather Report
AIRS		atmospheric infrared sounder
AIRS-AMSU	Atmospheric Infrared-Advanced Microwave Sounding Unit
AIRS/MHS	Advanced Infrared Radiometer Sounder (Atmospheric Infrared
		Sounder)/Microwave Humidity Sounder
AIS		airborne imaging spectrometer
AIT		Asian Institute of Technology
AITP		Arctic Ice Thickness Project (WCRP)
AJAX		1983 Oceanographic cruise along 0° Meridian into Weddell Sea
		(U.S., SIO)
AL		Aeronomy Laboratory (Boulder, Colorado) (ERL)
Al		aluminum
Al2O3		alumina (aluminum oxide)
ALA		American Library Association
ALACE		Autonomous Lagrangian Circulation Explorer
ALADIN		Atmospheric Laser Doppler Instrument
ALARA		as low as reasonably achievable
ALBIOS		Aluminum Biogeochemistry in Soils (EPRI)
ALE		Atmospheric Lifetime Experiment
ALE/GAGE	ALE/Global Atmospheric Gases Experiment
ALEXIS		Array of Low-Energy X-Ray Imaging Sensors
Alf		Grimco A-700 processor used for data analysis
ALFA		AER Local Forecast and Assimilation (Model)
ALIAS		Aircraft Laser Infrared Absorption Spectrometer
ALK		alkalinity
ALOHA		A Long-term Oligotrophic Habitat Assessment
ALPEX		Alpine Experiment
ALS		Adirondack Lake Survey (ALSC)
ALSC		Adirondack Lake Survey Corporation
ALSS		Aluminum in Streams Study (EPRI)
ALT		altimeter
ALT		Alert, Northwest Territories, Canada
ALTA		Active Long Term Archive
AMA		African Mountains Association
AMAD		activity median aerodynamic diameter
AMAP		Arctic Monitoring and Assessment Programme
AMBIACE		Amazon Biogeochemistry and Atmospheric Chemistry Experiment
AMD		Developing America
AmeDAS		Automated Meteorological Data Acquisition System
AMEX		Atlantic Meteorology Experiment
AM/FM		Automated Mapping/Facilities Management (Society)
AMI		active microwave instrumentation
AMIE		Automated Methane Instrument Evaluation
AMIGO		America's Inter-hemispheric Geobiosphere Organization
AMIP		Atmospheric Model Intercomparison Project
AMMS		Advanced Multichannel Microwave Sensor
AMQUA		American Quaternary Association
AMRIR		advanced medium resolution imaging radiometer
AMS		accelerator mass spectrometry
AMS		American Mathematical Society
AMS		American Meteorological Society
AMS		Applied Mathematical Sciences (DOE)
AMSR		advanced microwave scanning radiometer
AMSU		advanced microwave sounding unit
AMSU-A		advanced microwave sounding unit-A
AMTS		advanced moisture and temperature sounder
AMU		atomic mass unit
ANARE		Australian National Antarctic Research Establishment
ANBS		Asian Network of Biological Sciences
ANC		acid-neutralizing capacity
ANL		Argonne National Laboratory
ANFC		Annual Natural Forest Cleared
ANL/ACRF	ANL's Advanced Computing Research Facility
Ann		annual
ANNEX I		Countries committed to a quantified CO2 target (OECD, EU, Central and Eastern European countries)
ANNEX II	OECD countries and EU
ANSI		American National Standards Institute
ANSTO		Australian Nuclear Science and Technology Organization (Menai, New
		South Wales)
ANT		Antarctica (START)
ANTARES		Antarctic research (France) (JGOFS)
ANTARFIX	Antarctic fixed station (France) (JGOFS and WOCE)
ANU		Australian National University (Canberra, Australia)
AO		announcement of opportunity
AO		atmosphere-ocean
AOD		aerosol optical depth
AODC		acridine orange direct count
AOGCM		Atmosphere-Ocean General Circulation Model
AOIPS		Atmospheric and Oceanographic Information Processing System
AOL		Airborne Oceanographic Lidar
AOML		Atlantic Oceanographic and Meteorological Laboratory (Miami, Florida) (ERL)
AOSB		Arctic Ocean Sciences Board
AOSIS		Association of Small Island States
AOVP		Arctic Ocean Variability Project (ACSYS
ACSYS)
AP		Annual Production
APA		Adirondack Park Agency
APA		alkaline phosphatase activity
APAFO		Advanced Particles and Fields Observer
APAR		absorbed photosynthetically active radiation
APARE		East Asian-North Pacific Regional Experiment (IGAC)
APC		Apparent consumption
APCA		Air Pollution Control Association (Pittsburgh)
APDA		Arctic Precipitation Data Archive (ACSYS)
APEC		Asia Pacific Economic Cooperation Organization
APHA		American Public Health Association
API		American Petroleum Institute
APMP		Acid Precipitation Mitigation Program (NAPAP)
APN		Asia-Pacific Network (for Global Change Research) (START)
APSRS		Aerial Photo Summary Records System
APT		automatic picture transmission
AQA		American Quaternary Association
Ar		Argon
ARA		atmospheric radiation analysis
ARAC		Atmospheric Release Advisory Capability (program)
ARC		Ames Research Center
ARC		Antarctic Research Center
ARC/INFO	GIS software
ARCS		Atmospheric Radiation and Cloud Station
ARCSS		Arctic System Science (program)
ARDB		Arctic Runoff Database (ACSYS)
ARGOS		Argos Data Collection and Position Location System (CNES and NOAA)
ARINC		Aeronautical Radio, Inc.
ARINC		Aeronautical Research, Inc.
ARISTOTELES	Applications and Research Involving Space Technologies Observing the
		Earth's Field from  a Low Earth Orbiting Satellite
ARL		Air Resources Laboratory, Silver Spring, Maryland (NOAA)
ARL		Australian Radiation Laboratory (Melbourne, Victoria)
ARM		Atmospheric Radiation Measurement (DOE program)
ARMA		Autoregressive moving-average
ARMSAT		Atmospheric Radiation Measurement Satellite
ARPA		Advanced Research Project Agency
ARRCC		Analysis of Rapid and Recent Climate Change (project)
ARS		Agricultural Research Service (USDA)
ARSMC		ASEAN Regional Specialized
		Meteorological Centre
ART		Arctica (START)
ARTEMIS		Advanced Relay and Technology Mission Satellite (ESA)
ARTEP		Ariane Technology Experiment Platform (European)
ARW		Advanced Research Workshop
AS		Anti-Spoofing on GPS Transmissions
AS		Area of Savanna
ASA		American Statistical Association
ASA		Antarctic Support Association
ASA		Atmosphere Spectroscopy Applications
ASB		Area of Savanna Burned annually
ASAP		Automated Shipboard Aerological Programme
ASAR		Advanced Synthetic Aperture Radar
ASAS		Advanced Solid State Array Sensor
ASASP		Active Scattering Aerosol Spectrometer Probe
ASB		Association of Southeastern Biologists
ASCAT		advanced scatterometer
ASCATT		advanced scatterometer
ASCE		American Society of Civil Engineers
ASCEND		Agenda of Science for Environment and Development into the 21st
		Century
ASChE		American Society of Chemical Engineers
ASCII		American Standard Code for Information Interchange
ASCOT		Atmospheric Studies in Complex Terrain (program)
ASCS		Agricultural Stabilization and Conservation Service
ASDAR		Aircraft-to-Satellite Data Relay
ASE		Air Sea Experiment
ASEAMS		Association of Southeast Asian Marine Scientists
ASEAN		Association of Southeast Asian Nations
ASF		Alaska SAR Facility
ASF		Atmospheric Stablization Framework
ASHOE		Airborne Southern Hemisphere Ozone Experiment
ASI		Agenzia Spaziale Italiana (Italian Space Agency)
ASK		Assisted Search for Knowledge
ASL		above sea level
ASL		atmospheric surface layer
ASLO		American Society of Limnology and Oceanography
ASM		Applied Simulation and Modelling (IASTED)
ASME		American Society of Mechanical Engineers
ASOEN		ASEAN Senior Officials on the Environment
ASOS		Automated Surface Observing System
ASPP		American Society of Plant Physiologists
ASPRS		American Society for Photogrammetry and Remote Sensing
ASR		aerosol solar radiation
ASSAS		Advanced Solid State Array Sensor 
ASTER		Advanced Spaceborne Thermal Emission and Reflection (radiometer)
ASTER		Atmosphere-Surface Turbulent Exchange
		Research (formerly ITIR)
ASTEX		Atlantic Stratocumulus Transition Experiment
ASTM		American Society for Testing and Materials (Philadelphia, Pennsylvania)
ASU		Air Separation Unit
ATES		Alcatel Espace Systems
ATDD		Atmospheric Turbulence and Diffusion Division
		(formerly ATDL) (NOAA)
ATDL		Atmospheric Turbulence and Diffusion
		Laboratory (now ATDD)
ATF		atmospheric transmission factor
Atlantis	Research vessel (U.S.)
ATLAS		Atmospheric Laboratory for Applications and Science
ATLAS		Airborne Turnable Laser Absorption Spectrometer
ATLID		atmospheric lidar
atm		atmosphere
ATM		Atmospheric Transport Model
ATMOS		Atmospheric Trace Molecules Observed by Spectroscopy
ATOVS		Advanced TOVS
ATP		adenosine triphosphate
ATPEX		ARM Tropical Pacific Experiment
ATS		Advanced Technology Satellite
ATS		Antarctic Treaty System
ATS		applications technology satellite
ATS		Advanced Turbine Systems
ATSR		along-track scanning radiometer
AURIO		Auroral Imaging Observatory
AV		acoustic velocity (geophysical logging)
AVCS		Advanced Vidicon Camera System
AVD		acoustic variable density (geophysical logging)
AVHRR		advanced very high resolution radiometer
		(NOAA)
AVHRR GAC	AVHRR Global Area Coverage
AVHRR LAC	AVHRR Local Area Coverage
AVIRIS		airborne visible and infrared imaging spectrometer
AVISCO		French group for Analysis, Validation, and Investigation of Satellite
		Oceanography
AVNIR		advanced visible and near-infrared radiometer
avtur		aviation gas turbine fuel
AWDB		Adirondack Watershed Data Base
AWIPS-90	Advanced Weather Interactive Processing System for the 90s
AWRA		American Water Resources Association
AWIS		Association for Women in Science
AWWA		American Water Works Association (Denver)
AXCTD		autonomous expendable CTD profiler

B

b/w		black and white
B%T		Animal population ratio living in temperate climate region
BaA		benz[a]anthracene
BAAS		British Association for the Advancement of Science
BAHC		Biospheric Aspects of the Hydrological Cycle
		(program) (IGBP)
BAHC-SSC	BAHC Scientific Steering Committee
BALTEX		Baltic Sea Experiment
BAO		Boulder Atmospheric Observatory
BaP		benzo[a]pyrene
BaPDE		chemically reactive diolepoxides
BAPMoN		Background Air Pollution Monitoring Network (WMO)
BASC		Board on Atmospheric Science and Climate,
		National Research Council (U.S.)
BARA		Pressure in Atmosphere
BASE		Beaufort and Arctic Storms Experiment (Canada)
BATAN		Reactor and Nuclear Research Facilities, National Atomic Energy Agency
BATERISTA	Biosphere-Atmosphere Transfers and Ecological Research in Situ Studies in
		Amazonia (BAHC and GEWEX)
BATGE		Biosphere-Atmosphere Trace Gas Exchange (in the tropics) (IGAC)
BATS		Bermuda Atlantic Time Series
BATS		Biosphere-Atmosphere Transfer Scheme (NCAR)
BAU		business-as-usual
b.a.u.		business as usual (scenario)
BB		Biomass Burned
BBHIR		broadband hemispherical in flux radiometer
BBHSR		broadband hemispherical solar radiometer
BBL		benthic boundary layer
bbl		barrels (of oil)
BBSR		Bermuda Biological Station for Research
BBSRC		Biotechnology and Biological Science Research Council
BBSS		balloon-borne sounding system
BBZ		benthic boundary zone
BC		black carbon
BCC		British Coal Corporation (U.K.)
BCD		Binary Coded Decimal
BCF		bioconcentration factor
BEMS		Bioelectromagnetics Society
BEST		Bilan Energetique du Systeme Tropical
Bet		Grimco A-700 processor used for data collection
BF		Biomass quantity burned in fields
BGC		biogeochemical cycle
BGL		British Gas Lurgi (gasifier)
BHD		designation of an ice core drilled in 1977 at Law Dome, Antarctica
BIA		Bureau of Indian Affairs (DOI)
BIBEX		Biomass Burning Experiment (IGAC)
BiE		Business in the Environment
BIGSTIG		biomass integrated gasifier steam-injected gas turbine
BIG-TT		BAHC-IGAC-GCTE Task Team
BIH		Bureau International de l'Heure
BIOME		global biome model
BIOMOVS		Biospheric Model Validation Study
BIOSYNOP	Biological Synoptic Ocean Prediction
BIOTRANS	biological transformations (site at 47°N 20°W)
BIOTROP		Regional Center for Tropical Biology
BIPM		Bureau International de Poids et Mesures 
BLM		Bureau of Land Management (DOI)
BLS		"Basic Linked System" scenario
BMAP		Biological Monitoring and Abatement Program
BMC		Baltic Marine Cooperation
BMFT		Bundes Ministerium fur Forschung und Technologie (Germany)
BMG		Meteorological and Geophysics Agency
BMRC		Bureau of Meteorology Research Centre (Australia)
BMWT		Biofuels and Municipal Waste Technology (Division) (DOE)
BNA		Block Numbering Area
BNAP		Basic Hydrological Network Assessment Project
BNL		Brookhaven National Laboratory
BNSC		British National Space Centre
BO		CH4 producing potential
BOB		Bureau of the Budget
BOC		Bureau of Census (DOC)
BOD		Biochemical Oxygen Demand
BODC		British Oceanographic Data Centre (Bidston)
BOF		basic oxygen furnace
BOFS		Biogeochemical Ocean Flux Study (U.K.)
BOM		benthic organic matter
BoM		Bureau of Meteorology (DASET)
BOR		Bureau of Reclamation (DOI)
BOREAS		Boreal Ecosystems Atmosphere Study
		(BAHC and GEWEX)
BORIS		BOREAS Information System
BP		before present
BPA		Bonneville Power Administration
BPKM		billion passenger kilo metre
BPPT		Agency for Assessment and Application of Technology (Indonesia)
Bq		Becquerel (symbol) (SI unit of activity of ionizing
		radiation source)
BRDF		bidirectional reflectance distribution function
BrO		bromine monoxide
BRW		Barrow Observatory (Barrow, Alaska) (CMDL)
Bs		Natural forest biomass burned onsite
BSIP		Birban Sahani Institute of Paleobotany
BSRN		Baseline Surface Radiation Network
BTCs		breakthrough curves (column-elution tests)
Btu		British thermal unit
BUFR		Binary Universal Form for the Representation (of data)
BuREC		Bureau of Reclamation (now WPR)
BUV		Backscatter Ultraviolet Radiometer
BVE		Barotropic vorticity equation
BW		bulk water
BWTP		Basalt Waste Isolation Project

C

13C		carbon-13 (carbon isotope with atomic weight of 13)
14C		carbon-14 (carbon isotope with atomic weight of 14)
C		carbon
C		Celsius, centigrade
C/A		Coarse/Acquisition GPS signal structure
C&W		Animal population ratio living in warm climate region
C-MACCS		Centre for Mathematical Modeling and Computer Simulation
C3AT		Ch3 Albedo Test (AVHRR)
ca.		circa
CAA		Central Arid Asia (START)
CAA		Clean Air Act (1970)
CAAP		Composition and Acidity of Southeast Asian Precipitation
CAC		Climate Analysis Centre (now CPC) (WMO)
CAC		Committee on Atmospheric Chemistry
CACGP		Commission on Atmospheric Chemistry and Global Pollution (IAMAS)
CAD		computer-aided design/ drafting/drawing
CADD		computer-aided design and drafting
CAeM		Commission for Aeronautical Meteorology (WMO)
CAF		Clean Air Facility
CAgM		Commission for Agricultural Meteorology (WMO)
Cal/Val		calibration/validation
CALCOFI		California Cooperative Fisheries Investigation
CAM		crassulacean acid metabolism
CAMS		Control and Monitoring System
CAO		cold air outbreak
CAP		Central Arizona Project (USBR)
CAPPI		Constant Altitude Plan Position Indicator
CAR		Caribbean (START)
CARBICE		Carbon Dioxide Intercalibration Experiment (IGAC)
CARDS		climatological aerological reference data set
CARS		Climate Applications Referral System
CARS		coherent anti-Stokes Raman scattering
CART		Cloud and Radiation Testbed (ARM)
CAS		Chemical Abstract Series
CAS		Chinese Academy of Science
CAS		Commission for Atmospheric Sciences (WMO)
CASA		Inter-Union Commission on the Application of Science to Agriculture,
		Forestry, and Aquaculture (ICSU)
CASSAD		Centre for African Settlement Studies and Development
CAST		Chinese Academy of Science and Technology
CAT		computerized axial tomography
CBA		cost benefit analysis
CBO		Congressional Budget Office (U.S.)
CBS		Commission for Basic Systems (WMO)
CC		Combined Cycle
CCAM		Chikuko Cha Amayi M'Malawi (Women's NGO)
CCAQ		Consultative Committee on Administrative Questions
CCC		Canadian Climate Centre
CCCN		CDIAC Computing System Network
CCCO		Committee on Climate Changes and the Ocean (SCOR and IOC)
CCCP		California Institute of Technology Concurrent Computation Project
CCD		charge-coupled device (camera)
CCDB		Carbon content of dead biomass
CCDP		Climate Change Detection Project
CCGT		Combined Cycle Gas Turbine
CCI		Commission for Climatology (WMO)
CCIR		International Radio Consultative Committee (ITU)
CCITT		International Consultative Committee on Telegraphs and
		Telecommunications (ITU)
CCIW		Canadian Centre for Inland Waters
CCL		Central CO2 Laboratory, SIO (WMO)
CCLB		Carbon content of living biomass
CCM1		community climate model one
CCM2		community climate model two (NCAR)
CCM		community climate model
CCM0		Community Climate Model (NCAR)
CCM2		Community Climate Model (version 2)
CCMS		Committee on the Challenges of Modern Society
CCN		cloud condensation nuclei
CCOP		Committee for the Coordination of Joint Prospecting for Mineral
		Resources in Asian Offshore Areas (Indonesia)
CCRS		Canada Centre for Remote Sensing
CCSDS		Consultative Committee for Standard Data Services
CCT		computer-compatible tape
CD		Chemistry Division
CD		community development
CD		compact disc
CDAS		Climate Data Assimilation System
CDC		Control Data Corporation
CDCR		conceptual design and cost review
CDDIS		Crustal Dynamics Data Information System
CDF		common data format
CDIAC		Carbon Dioxide Information Analysis Center
		(formerly CDIC) (ORNL/DOE)
CDIC		Carbon Dioxide Information Center (now CDIAC)
CDMS		Cryospheric Data Management System
CDNC		Cloud drop number concentration
CDOS		Customer Data and Operations System
CDP		Crustal Dynamics Project (NASA)
CDRD		Carbon Dioxide Research Division
CD-ROM		compact disc-read only memory
CDRP		Carbon Dioxide Research Program
CDW		Circumpolar Deep Water
CE		Office of Conservation and Renewable Energy
CE		Combusion Efficiency
CEA		cause-and-effect analysis
CEA		Central Electricity Authority (India)
CEA		Council of Economic Advisors
CEA		Commissariat a l'Energie Atomique (France)
CEAREX		Coordinated Eastern Arctic Experiment
CEC		cation exchange capacity
CEC		Commission of European Communities
CEDAR		Coupled Energetics and Dynamics of the Atmospheric Regions
CEDDA		Center for Experiment Design and Data Analysis (NOAA)
CEEM		Center for Energy and Environmental Management
CEES		Committee on Earth and Environmental Sciences
		(formerly CES; replaced by CENR)
CEI		Center for Environmental Information
CEM		cumulus ensemble model
CEMA		Council of Mutual Economic Aid (Russian Federation, formerly U.S.S.R.)
CEN		European Committee for Standardization (EC)
CENELEC		European Committee for Electrotechnical Standardization (EC)
CENR		Committee on Environmental and Natural
		Resources (U.S. NCST)
CENTO		Central Treaty Organization
CEOS		Committee on Earth Observation Satellites
CEP		circular error probability
CEP		Comite Ecumenico de Proyectos
CEPAL		Comision Economica para America Latina (Spain) (ECLA)
CEPAL		Economic Commission for Latin America (Spain) (ECLA)
CEPEX		Central Equatorial Pacific Experiment
CEPT		Conference Europeenne des Administration des Postes et
		Telecommunications (European Conference of Postal and Telecommunications
		Administrations)
CEQ		Council on Environmental Quality (U.S.)
CER		carbon dioxide exchange rate
CERCLA		Comprehensive Environmental Response, Compensation, and Liability
		Act (1980) (Superfund)
CERES		Clouds and the Earth's Radiant Energy System (EOS)
CERES		Crop Environment Resource Synthesis
CERGA		Centre d'Etudes et de Rechereches Geodynamiques et Astronomiques
CERL		Corvallis Environmental Research Laboratory (EPA)
CERN		Chinese Ecological Research Network
CERN		European Laboratory for Particle Physics
CERN		European Organization for Nuclear Research
CERP		Cooperative Ecological Research Project (PRC,
		Germany, and UNESCO)
CERSAT		French group for processing ERTS-1 low bit rate data from ocean areas
CES		Committee on Earth Sciences (now CEES)
CETA		Carbon Emissions Trajectory Assessment
CETA		Comprehensive Education and Training Administration
CF		concentration factor
CF		Carbon Fraction
CFAGB		Carbon fraction of above ground biomass
CFC		chlorofluorocarbon
CFC		chlorinated fluorocarbon
CFC-11		CC13F, trichlorofluoromethane, Freon-11
CFC-12		CCl2F2, dichlorodifluoromethane, Freon-12
CFC-113		CCl2FCClF2, 1,1,2-trichlorotrifluoroethane
CFEM		combined fates and effects model
CFF		Carbon fraction of fuel
CFM		Chlorofluoromethane
CFR		Code of Federal Regulations
CFRI		Central Fuel Research Institute (India)
CGBAPS		Cape Grim Baseline Air Pollution Station
CGC		Committee on Global Change
CGC		Management and Coordination Advisory Committee
CGCM		coupled atmosphere/ocean general circulation model
CGCP		Canadian Global Change Program
CGED		Committee on Geophysical Environmental Data (NAS)
CGES		Center for Global Environmental Studies
CGMS		Coordination of Geostationary Meteorological Satellites
CGMW		Commission for the Geological Map of the World
CGO		Cape Grim (Tasmania) (baseline station)
CH4		methane
CH4-C		Methane-carbon ratio
CH3CL		methyl chloride
CH3CCl3		methylchloroform (1,1,1-trichloroethane)
CHAMMP		Computer Hardware, Advanced
		Mathematics, and Model Physics (Climate Modeling Program)CHEMRAWN	Chemical Research Applied to World Needs (IUPAC)
CHP		Combined Heat and Power
CHRIS		Chemical Hazard Response Information System
CH.SS		Permanent Interstate Committee for Drought
		Control in the Sahel (CILSS)
CHy		Commission for Hydrology (WMO)
CI		Conservation International (Washington, D.C.) (NGO)
CIA		Central Intelligence Agency
CIAP		Climate Impact Assessment Program
CIAP		Inter-American Committee for the Alliance for Progress
CIDA		Canadian International Development Agency
CIE		Chinese Institute of Electronics
CIEA		Committee on International Environmental Activities
CIESIN		Consortium for International Earth Science
		Information Network (U.S.)
CIG		Commonwealth Industrial Gases (U.K.)
CIHEAM		Centre International de Hautes Etudes Agronomiques Mediterraneenes
CIL		Coal India Limited
CILSS		Comite Inter-Etats pour la Lutte Contre la
		Secheresse au Sahel (CH.SS) (consists of Chad,
		Gambia, Mali, Mauritania, Niger, Senegal, Upper Volta, and Cape Verde Islands)
CIMO		Commission for Instruments and Methods of Observation (WMO)
CIMSS		Cooperative Institute for Meteorological Satellite Studies
CINOF		Campaign for Integrated Observations of Solar Flares
CIR		color-infrared (film)
CIRAC		Canadian Institute for Research in Atmospheric Chemistry
CIRES		Cooperative Institute for Research in Environmental Sciences (University
		of Colorado, Boulder)
CIRT		cirrus test
CIS		CDIAC Information System
CIS		Commonwealth of Independent States
CISPR		International Special Committee on Radio Interference
CISTI		Canada Institute for Scientific and Technical Information
CIT		California Institute of Technology
CITE		Chemical Instrumentation Test and Evaluation
CIUS		Conseil International des Unions Scientifiqes (ICSU)
CKE		cumulus kinetic energy
CLAES		cryogenic limb array etalon spectrometer
CLARET		Cloud Lidar and Radar Exploratory Test
CLASS		Cross-chain Loran Atmospheric Sounding System
CLAVR		Clouds from AVHRR
CLI		Climate Change (project)
CLIC		Climate Inventory and Catalog
CLICOM		climate computing
CLIMAP		Climate Long-Range Investigation Mapping and Prediction (project)
CLIMAP		Climate Applications Project (WMO)
CLIVAR		Climate Variability and Predictability (WCRP)
ClNO3		chlorine nitrate
ClO		chlorine monoxide
ClO2		chlorine dioxide
ClONO2		chlorine nitrate
ClNO3		chlorine nitrate
CLP		Contract Laboratory Program (EPA)
CLRI		Central Leather Research Institute (India)
CLS		Collected Localization Satellites (France)
cm		centimeter
cm3		cubic centimeter (milliliter)
CMA		Cement Manufacturers' Association (U.S.)
CMAP		Climate Modeling, Analysis, and Prediction (program)
CMC		Canadian Meteorological Centre
CMD		Coordinator for Multi-lateral Development Program
CMDL		Climate Monitoring and Diagnostics
		Laboratory (Boulder, Colorado) (NOAA and ERL)
CME		Community Modelling Effort (U.K.)
CMIE		Centre for Monitoring the Indian Economy
CMM		Commission for Marine Meteorology (WMO)
CMP		Climate Modelling Programme
CMP		computer modeling package
CMRS		Coal Mines Research Station
CMS		Configuration Management System
CN		condensation nuclei
CNC		condensation nucleus counter
CNES		Centre Nationale d'Etudes Spatiales (French
		Space Agency)
CNET		Centre National d'Etudes des Telecommunications (France)
CNG		compressed natural gas
CNR		Committee on Natural Resources
CNR		Consiglio Nazionale delle Ricerche (Italy)
CNRET		Centre for Natural Resources Energy and Transport (UN)
CNRS		National Scientific Research Center (Centre Nationale de la Recherche
		Scientifique) (France)
CO		carbon monoxide
CO-C		Carbon monoxide carbon trace gas emission
CO2		carbon dioxide
COADS		Comprehensive Ocean-Atmosphere Data Set
COARE		Coupled Ocean-Atmosphere Response Experiment (TOGA and WCRP)
COBIOTECH	Scientific Committee for Biotechnology (ICSU)
CODATA		Committee on Data for Science and Technology (ICSU)
CODMAC		Committee on Data Management, Archiving, and Computation
COE		U.S. Army Corps of
		Engineers
COGEOMAP	Federal-State Cooperative Geologic Mapping
COHMAP		Cooperative Holocene Mapping Project
Co-I		co-investigator
COLA		Center for Ocean-Land-Atmosphere Studies
COM		Communication Department
CONA		Committee for OWSE-North America
CoP		Conference of the Parties to the FCCC
COPS		continuously operating per fluorocarbon sniffer
COPUOS		Committee on Peaceful Uses of Outer Space (UN)
Corp.		Corporation (spell out in text; abbreviate in references, lists tables, footnotes,
		bibliographies, and indexes)
COS		Carbonyl sulfide
CoSAMC		Commission for Special Applications of Meteorology and Climatology
		(WMO)
COSPAR		Committee on Space Research (ICSU)
COST		Committee on Science and Technology (ASEAN)
COSTED		Committee on Science and Technology in Developing Countries
		(ICSU)
COW		Committee on Water
COWAR		Committee on Water Research (ICSU and UATI)
COWRR		Committee on Water Resources Research
CPA		Centrally Planned Asia
CPC		Climate Prediction Center (formerly  CAC)
CPE		Eastern Europe (also called Centrally Planned Europe)
CPEs		Centrally-planned economies
CPM		critical path method
CPMS		climatological prediction by model statistics
CPO		Core Project Office (IGBP)
CPP		cloud photopolarimeter
CPPC		Core Project Planning Committee (IGBP)
CPRS		cloud-profiling radar system
CPS		certified professional secretary
CPU		central processing unit
CPUE		catch per unit effort
CRC		Climate Research Committee
CRC		cyclic redundancy check
CRD		Carbon released from dead biomass
CRE		Coal Research Establishment of BCC (U.K.)
CRE		Centro Ricerche Energia, Italy (ENEA)
CREN		Chemical Research and Environmental Needs
CREO		Cryosphere Research on Qingzang Plateau
CRESP		Coordinated Research and Environmental Surveillance Programme
		(NEA)
CRF		cloud radiative forcing
CRI		Climate Research Institute (Oklahoma State University)
CRIC		Computerized River Information System (U.S. Fish
		and Wildlife Service)
CRL		Carbon released from living biomass
CRM		certified reference material
CRP		Climate Research Program
CRPE		Centre de Recherches en Physique de l'Environment Terrestre et Planetaria
CRREL		Cold Regions Research and Engineering Laboratory (COE)
CRS		cavity-ringdown spectrometer
CRT		cathode-ray tube
CRU		Climatic Research Unit (UEA, Norwich, U.K.)
CRYSYS		Cryospheric System
CS		Computer Services Department
CS		Carbon stored
CSA		Canadian Space Agency
CSA		Chinese Society of Astronautics
CSATA		Centra Studi e Applicazioni in Tecnologie Avanzate (Italy)
CSD		Commission on Sustainable Development
CSEC		Centre for the Study of Environmental Change (University of Lancaster)
CSELI		Centra Studi e Laboratori Telecommunicazioni (Italy)
CSERGE		Centre for Social and Economic Research on the Global Environment
		(UEA and University College, London)
CSES		Center for the Study of Earth from Space (University of Colorado, Boulder)
CSIR		Council of Scientific and Industrial Research (India)
CSIR		Council for Scientific and Industrial Research (South Africa)
CSIRO		Commonwealth Scientific and Industrial
		Research Organization (Australia)
CSIRO/DAR	CSIRO/Division of Atmospheric Research
		(Australia)
CSM		climate system monitoring
CSMP		Climate System Modeling Program
CSO		Central Statistical Organization
CSPP		Collaborative Special Project and Programme
CSR		Centra de Sensores Remotes (Italy)
CSRS		Cooperative State Research Service
CST		CHAMMP Science Team
CSTR		Committee on Solar-Terrestrial Research (BASC)
CSU		Colorado State University (Fort Collins)
CTD		Chemical Technology Division (ORNL)
CTD		conductivity, temperature, and depth sensor
		(instrument)
CTD		continuous-temperature-depth
CTM		Chemistry/Transport Models
CTS		Committee on the Teaching of Science
CTSS		Cray time-sharing system
CU		University of Colorado
CUF		capacity utilization factor
cv		Calorific Value
C.V.		coefficient of variation (math)
CVS		Conference and Visitors' Services
CW		continuous wave
CW		"Conventional Wisdom" scenario, World Bank, 1990
CWA		Clean Water Act (1977)
CWR		continuous-wave radar
CWSF		Chemical Waste Storage Facility
CY		calendar year
CZCS		coastal zone color scanner
CZM		Coastal Zone Management
CZMA		Coastal Zone Management Act (1972)

D

D/H		deuterium/hydrogen (ratio)
1-D		one-dimensional
2-D		two-dimensional
3-D		three-dimensional
4-D		four-dimensional
4DDA		four-dimensional (4D) data assimilation
1-D RCM		one-dimensional radiative-convective model
2-D RCAM	two-dimensional radiative-advective-convective equilibrium model
D		Deuterium (also abbreviated as 2D or 2H)
DAAC		Data Active Archive Center
DAAC		Distributed Active Archive Center
DAC		Data Assembly Centre (WOCE)
DADS		Data Archive and Distribution System
DAEDALUS	Documenting Aerosol Electromagnetics, Defining Aerosol Lifetimes, and
		Understanding Sources (Research Stations)
DAR		Division of Atmospheric Research (CSIRO)
		(Aspendale, Victoria, Australia)
DARA		Deutsche Agentur fur Raumfahrtangelegenheiten (Germany)
DARE		data rescue
DARPA		U.S. Defense Advanced Research Projects Agency
DAS		data-assimilation system
DAS		data acquisition system
DAS		direct access system
DASA		Deutsche Aerospace Administration
DASET		Department of the Arts, Sports, the
		Environment, Tourism, and Territories (formerly DASETT)
DASETT		Department of the Arts, Sports, the
		Environment, Tourism, and Territories (now DASET)
DAT		Department of Science and Technology
DB		direct-beam (irradiance)
DB		direct broadcast
DBE		Deep Basin Experiment
dbh		diameter at breast height
DBMS		data base management systems (Deutsche Forschungs-und Versuchsanstalt fur
		Luft-und Raumfahrt (Germany)
DBS		Doppler beam swinging
DC		United States Department of Commerce
DC		developing country
DC		Dairy cattle
D.C.		District of Columbia
DCAR		Danish Centre for Atmospheric Research
DCDS		Digital Cartographic Data Standard
DCDSTF		Digital Cartographic Data Standards Task Force (Composed of members of
		the NCDCDS and FICCDC/SWG)
DCF		Discounted Cash Flow
DCP		data collection platform
DCP-OES		direct coupled plasma--optical emission spectroscopy
DCS		data collection system
DCT		dedicated carbon tax
DD		degree day
DDF		descriptive data file
DDL		direct downlink
DDMP		domain-decomposition-message-passing
DDRP		Direct/Delayed Response Project
DDT		dichlorodiphenyl-trichloroethane (insecticide)
DE		dynamics explorer
DE		Decay
DE08		designation for an ice core drilled in 1977 at Law Dome, Antarctica
DEBITS		Deposition of Biogeochemically Important Trace Species (IGAC)
DEC		Digital Equipment Corporation
DECNet		Digital Equipment Corporation Network
Dehydrite	magnesium perchlorate anhydrous granular
dE/dt		rate of evaporation (moisture loss from soil)
DEIS		Draft Environmental Impact Statement
DEM		digital elevation model
DEMR		Department of Energy, Mines, and Resources
		(Canada)
DEW		distant early warning
DGCM		Dynamic Global Vegetation Model
DGLR		Deutsche Gesellschaft fur Luft-und Raumfahrt (Germany)
DGVM		Dynamic Global Vegetation Model (GAIM)
DH		chromosome-doubled haploid
DHCN		Daily Historical Climate Network
DHHS		United States Department of Health and Human Services
DHS		Department of Human Services
DI		Directorate
DIA		Denmark's Academy for Engineering
DIAL		Differential Absorption Lidar
DIC		dissolved inorganic carbon
DICE		Dynamic Integrated Climate Economy
DIDAC		digital data acquisition system
DIF		Data Interchange Format
DIS		Data and Information Systems (EOS and IGBP)
Discovery	Research vessel (U.K.)
DISORT		discrete ordinate (model)
DIS-SC		DIS Standing Committee
DISSPLA		Display Integrated Software System and Plotting Language
DIU		Data Information Unit
DIW		Department of Industrial Works
DKD		Deutscher Kalibrierdienst
DLG		digital line graph
DLG-E		digital line graph-enhanced
DLR		Deutsche Forschungsanstalt fur Luft-und Raumfahrt (Germany)
DLS		dynamic limb sounder
DM		Data Management (WMO and WWW)
DM		deep monitoring (wells)DMA		Defense Mapping Agency (U.S.)
DMA		direct memory access (computer term)
DMDS		dimethyl disulfide
DM-MIMD		distributed memory, multiple instruction, multiple data (computer)
DMS		data management system
DMS		dimethyl sulfide or dimethylsulphide
DMSO		dimethyl sulfoxide
DMSP		Defense Meteorological Satellite Program (U.S.)
DNA		deoxyribonucleic acid
DND		Department of National Defense (Canada)
DNES		Department of Non-conventional Energy Sources (India)
DOA		United States Department of Agriculture
DOAI 		Department of Agriculture, Indonesia
DOAS		differential optical absorption spectroscopy
DOC		dissolved organic carbon
DOC		United States Department of Commerce
DOD		United States Department of Defense
DOD		Deutsches Ozeanographisches Datenzentrum (Germany)
DOE		Department of the Environment (Canada)
DOE		United States Department of Energy
DOI		United States Department of Interior
DOJ		United States Department of Justice
DOL		United States Department of Labor
DOLY		Dynamic Global Phytogeography Model (GCTE)
DOM		dissolved organic macromolecules
DOM		dissolved organic matter
DOMSAT		Domestic Communications Satellite
DOMSTAR		communications relay set
DOPLID		Doppler lidar
DORIS		Determination d'Orbite et Radio Positionement Integre par Satellite (France)
DORIS		Doppler Orbit and Radio Positioning Integration by Satellite
DOS		Department of Space
DOS		United States Department of State
DOST		Department of Science and Technology
DOT		United States Department of Transportation
DOY		day of year
DP		direct playback
DPC		display code (CDC)
DPC		Domestic Policy Council
DPR		development planning review
(D)PR		dual precipitation radar
DPS		Digital Photogrammetry System
DQO		Data Quality Objectives
DRAW		Direct Read After Write Animation System
DRS		Data Relay Satellite
DRSS		Data Relay Satellite System
DSB		direct sounding broadcast
DSDP		deep sea drilling project
DSIR		Department of Scientific and Industrial Research
		(now SRC) (U.K.)
DSIR		Department of Scientific and Industrial Research, Institute of Nuclear Sciences
		(New Zealand)
DSM		demand-side management
DSN		Deep Space Network
DSP		digital signal processing
DSRT		Deep Sea Reversing Thermometer
DSS		Data Support Section (NCAR)
DST		data system tests
DST		Department of Science and Technology
DTD		digital terrain data
DTH		Technical University of Denmark
DTR		Diurnal temperature range
DU		Dobson units
DUNDEE		Down Under Doppler and Electricity Experiment
DWBM		Office of Defense Waste Byproducts Management
DWS		Doppler wind sensor
DYFAMED		atmospheric dynamics and fluxes in the Mediterranean Sea (France)
		(JGOFS)
DYN		Dynamic Systems Project

E

E/GDP		Ratio of energy consumption to gross domestic product
E/GNP		Ratio of energy consumption to gross national product
EADS		Environmental Assessment Data System
EARSeL		European Association of Remote Sensing Laboratories
EAS		Environmental Analyses Section (ORNL)
EAs		Environmental Assessments
EASIZ		Ecology of the Antarctic Sea Ice Zone
EASOE		European Arctic Stratospheric Ozone Experiment
EAWEP		East Asia and Western Pacific
EAZO		Energy Active Zones of the Ocean
EBBR		Energy-Balance Bowen Ratio
EBCDIC		Extended Binary Coded Data Interchange Code (IBM)
EBM		energy-balance model
EC		eddy correlation
EC		electron capture
EC		elemental carbon
EC		Environment Canada
EC		European Community
EC		European Communities or Commission of the European Communities
EC		executive committee
EC		Executive Council (WMO)
ECA		Economic Commission for Africa (UN)
ECAFE		Economic Commission for Asia and the Far East
ECAMP		Environmental Compliance Assessment and Management Program 
		(USAF)
ECC		electrochemical concentration cell
ECD		effective cutoff diameter
ECD		electron capture detector (GC)
ECDIS		Electronic Chart Display and Information Systems
ECE		Economic Commission for Europe (UN)
ECG		Ecosystem Conservation Group (UNEP, FAO, UNESCO, and IUCN)
EC-GC		electron capture-gas chromatograph
ECHAM		European Centre/Hamburg Model (ECMWF/MPI)
ECHIVAL		European International Project on
		Climate and Hydrological Interactions between Vegetation, Atmosphere, and Land
		Surfaces (BAHC and EPOCH)
ECLA		Economic Commission for Latin America
ECLAC		Economic Commission for Latin America and the Caribbean (UN)
ECLIPS		Experimental Cloud Lidar Pilot Study
ECMWF		European Centre for Medium-Range
		Weather Forecasts (U.K.)
Ecom.		EOS communications
ECN		Netherlands Energy Research Foundation
ECN		Environmental Change Network
ECOMARGE	ecology of the continental margins (France) (JGOFS)
ECOSOC		Economic and Social Council (UN)
ECOWARM		European Committee for Water Resources Management (IAHS)
ECS		Environmentally Compatible Energy Strategies (project)
ECS		EOSDIS Core System
ECSL		European Centre for Space Law
ECTF		Edinburgh Centre for Tropical Forests
ECU		Environmental Change Unit (Oxford)
ECWA		Economic Commission for Western Asia
ED		Energy Division
EDA		elevation difference accuracy
EDAS		particulate/radon data system
EDC		EROS Data Center
EDD		Exchange of Digital Data
EDI		electronic Data Interchange
EDI		Equivalent-damage index
EDIS		Environmental Data and Information Service
EDOS		EOS Data and Operations System
EDP		electronic data processing
EDS		Environmental Data Service
EDSG		Energy Demand Steering Group
EDTA		ethylenediaminetetraacetate
EDTA		ethylenediaminetetraacetic (acid)
EDX		energy-dispersive X-ray (analysis)
EDXS		energy-dispersive X-ray spectroscopy
EEC		European Economic Communities
EEC		European Economic Commission
EEFSU		Eastern Europe and Former Soviet Union
EEI		Edison Electric Institute
EEP		east equatorial Pacific
EER		external engineering review
EEZ		Exclusive Economic Zone
EF		Emission Factor
EFCC		Externally Fired Combined Cycle
EFEDTA		European Field Experiment in Decertification Threatened Area
		(ECHIVAL and BAHC)
EFQ		Estimated fuel quantity consumed (Used to determine carbon stored)
e.g.		exempli gratia (for example) use only in parentheses or footnotes,
		followed by a comma)
EGCM		Eddy-resolving General Circulation Model
EGE		Enhanced Greenhouse Effect
EG&G		Edgerton, Germeshauser, and Greer
EGS		European Geophysical Society
EIA		Energy Information Administration (DOE)
EIPO		European IGAC Project Office Steering
		Committee
EIS		environmental impact statement
EISCAT		European Incoherent Scatter Facility
EISMV		Ecole Inter-Etats des Sciences et de Medecine Veterinaire (Dakar)
EJ		exajoule (1018 joules)
E-LIDAR		experimental lidar
ELS		Eastern Lake Survey
ELV		expendable launch vehicle
EM		electromagnetic
EMAP		Environmental Monitoring and Assessment Program
EMEP		Cooperative Programme for Monitoring and
		Evaluation of Long-Range Transmission of Air Pollutants in Europe
EMEP-CCC	EMEP-Chemical Coordination Centre
EMEX		Equatorial Mesoscale Experiment
EMF		Energy Modelling Forum
EML		Environmental Measurements Laboratory (DOE)
EMOC		EOSDIS Mission Operations Center
EMR		electromagnetic radiation
EMSL		Environmental Monitoring Systems Laboratory (EPA)
EMSL-LV		Environmental Monitoring Systems Laboratory - Las Vegas (Nevada)
		(EPA)
En		Natural forest biomass used for energy
ENEA		Energia Nucleare e delle Energie Alternative
		(Italy)
ENEA		Italian National Agency for New technology, Energy and the Environment
ENRIC		Environment and Natural Resources Information Center
ENRICH		European Network for Research on Global Change (CEC)
ENSO		El Nino/Southern Oscillation (coupled oceanic-atmospheric change)
ENVISAT		environmental satellite
EOC		Earth Observation Center (NASDA)
EOC		EOS Operations Center (NASA)
EOCAP		Earth Observation Commercialization Application Program
EODC		Earth Observing Data Center (U.K.)
EOF		empirical orthogonal function
EO-ICWG		Earth Observations International Coordination Working Group
EOPM		electro-optic phase modulation
EORCU		European Ozone Research Coordinating Unit
EOS		Earth Observing System (U.S.)
EOS-AERO	EOS Aerosol Mission
EOS-ALT		EOS Altimetry Mission
EOS-AM		EOS Morning Crossing (ascending) Mission or
		Earth Observing System (morning pass)
EOSAT		Earth Observation Satellite (commercial operator for satellite systems in
		the U.S.)
EOS-CHEM	EOS Chemistry Mission
EOSC		Earth Observations Science Committee (of ESA)
EOSDIS		EOS Data and
		Information System
EOSP		Earth Observing Scanning Polarimeter
EOS PM		Earth Observing System (afternoon pass) or EOS Afternoon Crossing (descending) Mission
EOTC		European Organization for Testing and Certification (EC)
EP		Earth Probe
EP		extraction procedure (RCRA and EPA)
EPA		Environmental Protection Agency (U.S.)
EPA		Environmental Protection Authority (Victoria, Australia) 
EPC		Environmental Protection Committee (Bahrain)
EPD		European Pollen Database
EPER		Environmental Processes and Effects Research (program)
EPI		environmental productivity index
EPICA		European Programme for Ice Coring in Antarctica (PAGES)
EPO		EOS Project Office
EPOCH		European Programme on Climate and
		Hazards (EEC)
EPOP		European Polar-Orbiting Platform
EPOPE		Etude de Processes dans l'Ocean Pacifique Equatorial
EPRI		Electric Power Research Institute (Palo Alto,
		California)
EPSRC		Engineering and Physical Sciences Research Council
EQPAC		Equatorial Pacific (JGOFS)
ER		Office of Energy Research
ER-2		Extended Range U-2 (aircraft)
ERB		Earth Radiation Budget
ERBE		Earth Radiation Budget Experiment
ERBES		Earth Radiation Budget Explorer Satellite
ERBS		Earth Radiation Budget Satellite
ERD		Ecological Research Division (DOE and OHER)
ERDA		U.S. Energy Research and Development Administration (formerly AEC; now DOE)
ERDAS		Earth Resources Data Analysis Systems
ERFEN		Estudio Regional del Fenomeno El Nino
ERFU		Environmental Restoration and Facilities Upgrade Program
ERIM		Environmental Research Institute of Michigan
ERL		Environmental Research Laboratory (Boulder,
		Colorado) (NOAA)
ERNets		Energy Research Networks
ERNI		wet-only rainfall collector
EROC		Ecological Rates of Change (NSF)
EROS		Earth Resources Observation Satellite
EROS		Earth Resources Observation System
EROS		European River Ocean System (EEC)
ERP		Environmental Research Parks
ERS		Economic Research Service
ERS		Earth Resources (or remote sensing) Satellite
ERS		ESA Remote Sensing Satellite
ERS		European Remote-Sensing Satellite
ERS-1		European Remote-Sensing Satellite-1
ERS-2		European Remote-Sensing Satellite-2
ERTS		Earth Resources Technology Satellite (now Landsat)
ERTS-1		Earth Resources Technology Satellite-1
ESA		Ecological Society of America
ESA		Endangered Species Act (1973)
ESA		Entomological Society of America
ESA		Equatorial South America (START)
ESA		European Space Agency
ESA/IRS		European Space Agency/Information Retrieval Service
ESAD		Earth Science and Applications Division (NASA
		HQ)
ESAER		European Space Agency's Earth Resources (Satellite)
ESAM		Institute for Environmental Science and Management
ESCAP		Economic and Social Commission for Asia and the Pacific (UN)
ESD		Environmental Sciences Division (ORNL)
ESDIS		Earth Science Data and Information System
ESF		European Science Foundation
ESF/EPC		ESF/European Palaeoclimate and Man Project
		(holocene climate)
ESMAP		Energy Sector Management Assistance Programme
ESMR		electronically (electrically) scanning microwave radiometer
ESOC		European Space Operations Center
ESRC		Environmental Science Research Center
ESRC		Economic and Social Research Council
ESRI		Environmental Systems Research Institute
ESSA		U.S. Environmental Science Services Agency
		(forerunner of NOAA)
ESSC		Earth System Sciences Committee
ESTAR		electronically scanned thinned array radiometer (ARM)
ESTEC		European Space Research and Technology Centre
ESTEC		European Space Technology Centre (Netherlands)
ET		evapotranpiration
ETA		estimated time of arrival
ETAC		Environmental Technical Applications Center (U.S.
		Air Force)
ETAP		Expanded Technical Assistance Program
ETC		Energy Technology Center
ETC		European Telecommunications Standards Institute (EC)
etc.		and others especially of the same kind; and so forth
ETF		Engineered Test Facility
ETF		Environmental Task Force
ETI		Economic Transition and Integration (project)
ETM		enhanced thematic mapper (Landsat)
ETRP		Education and Training Programme (WMO)
ETSA		electron transport system activity
ETV		electrothermal vaporizer
EU		Agri-residue utilized for energy supply
EU		European Union
EUMELI		eutrophic, mesotrophic, and oligotrophic sites (France) (JGOFS)
EUMETSAT	European Organization for the
		Exploitation of Meteorological Satellites
EUR		Bureau of European Affairs
EURECA		European Retrievable Carrier
EUROSTART	European Planning Committee for START
EUROTRAC	European Experiment on Transport and
		Transformation of Environmentally Relevant Trace Constituents (in the Troposphere
		over Europe)
EUV		extreme ultraviolet
EVA		extra vehicular activity
EXCOMM		Executive Committee
EZE		Asociacion Protestante de Cooperacion para el Desarrollo en Alemania

F

%FCO		Fraction of carbon oxidized
f		Fraction
FAA		Federal Aviation Administration (U.S.)
FAB		Finance and Budget
FAB		Fraction actually burned
FABF		Fraction of agri-residue burned in fields
FACE		free-air carbon dioxide enrichment (GCTE)
FAD		Fraction actually degrades
FAGS		Federation of Astronomical and Geophysical Services (ICSU)
FAI		Fertilizer Association of India
FANGIO		Feedback Analysis for GCM Intercomparison
		and Observations
FAO		Food and Agriculture Organization (UN) (ICSU)
FAP		Food and Agriculture Project
FAPIS		Formation en Amenagement Pastoral Integre au Sahel
FAQ		Frequently Asked Question
FAR		Federal Acquisition Regulations
FARS		Facility for Atmospheric Remove Sensing
FASINEX		Frontal Air-Sea Interaction Experiment
FAST		Fourier amplitude-sensitivity test
FATE		Formation of Aerosol and their Transformation over Europe (EUROTRAC)
FB		Fraction burned annually
FBS		Frontal Boundary Study
FBC		Fluidized Bed Combustor
FC		Fuel Consumption
FCC		Federal Communications Commission
FCCC		Framework Convention on Climate Change
FCCSET		Federal Coordinating Council for Science,
		Engineering, and Technology (now NSTC)
FCDS		Fleet Consolidated Data Set (U.S. Navy)
FCST		Federal Council for Science and Technology
FD		Fraction that is dead
FDA		facility disposal area
FDH		Fixed Dynamical Heating
FDI		field data investor
FDM		finite difference method
FDOC		Fraction of degradable organic carbon
FE		Fossil Energy Program (DOE)
Fe		iron
FEA		Far East
FEDC		Fusion Energy Design Center
FEDMAP		Federal Geologic Mapping Project
FEIS		final environmental impact statement
FeLINE		Iron as a Limiting-Nutrient Experiment (CSIRO)
FEM		finite element method
FEMA		Federal Emergency Management Agency (U.S.)
FEMA		Finite Element Model of Material Transport through Aquifers
FERC		Federal Energy Regulatory Commission
FEWA		Finite Element of Water Flow through Aquifers
FF		free format
FFES		Fossil Free Energy System
FFO		Fraction of oxidized
FFT		fast Fourier transformation
FGCC		Federal Geodetic Control Committee (U.S.
		National Ocean Service)
FGD		Flue Gas Desulphurisation
FGDC		Federal Geographic Data Commission
FGEF		Federal Geographic Exchange Format
FGGE		First GARP
		Global Experiment (WMO)
FGGE SOP	FGGE Special Observing Period
FICCDC		Federal Interagency Coordinating
		Committee on Digital Cartography (USGS)
FICCDC/SWG	FICCDC/Standards Working Group (U.S.)
FID		flame ionization detector (GC)
FIELD		Foundation for International Environmental Law and Development
FIFE		First ISLSCP Field Experiment
FIFRA		Federal Insecticide, Fungicide, and Rodenticide Act
FIN		Fish Information Network (data base)
FIPS		Federal Information Processing Standard
FIRE		First ISCCP Regional Experiment
FIREIFO		First ISCCP Regional Experiment
FIRESCAN	Fire Research Campaign Asia-North
FIT		Field Investigation Team (EPA)
FIZ		Fachinformationszentrum
FL		Fraction that live
FLAIR		Measurement of Micronutrient Absorption and Status
FLINN		Fiducial Laboratories for an International Natural Sciences Network
FLM		federal land manager (e.g., National Park Service)
FLUPAC		flux dans l'ouest du Pacifique equatorial (France) (JGOFS)
FMFR		four-minus-five restoral
FMFT		four-minus-five test
FNOC		Fleet Numerical Oceanographic Center (U.S. Navy)
FNWC		Fleet Numerical Weather Center (U.S. Navy)
FO		furnace oil
FOAM		Fates of Aromatic Model
FOLD		federally owned Landsat data
FOR		Forestry Resources (project)
FORAST		Forest Response to Anthropogenic Stress (model)
FORET		Forest of East Tennessee (model)
FORTE		fast on-orbit recording of transient events
FORTRAN		FORmula TRANslation (a computer language)
FOT		flight operations team
FOT		Fourier Optical Transform
FOV		field-of-view (of vision)
FPD		flame photometric detector
FR		Federal Register (use with numbers in text; use "Fed. Regis." in
		reference lists)
Fr		Quantity of biomass cleared annually from natural forests
Fr		Fraction of liquid waste treated anaerobically (In methane emissions from
		municipal liquid waste)
FRAM 		Fine Resolution Antarctic Model (U.K.)
FRG		Federal Republic of Germany (now Germany)
FRI		Forest Research Institute
FRLAB		Front Range Lidar, Aircraft, and Balloon (experiment)
FRONTAL		frontal process studies (France) (JGOFS)
FRR		fast repetition rate
FRRPA		Forest and Rangeland Renewable Planning Act (1974)
FS		Forest Service (USDA)
FSI		Forest Survey of India
FSL		Forecast Systems Laboratory (ERL and NOAA)
FSSP		forward scattering spectrometer probe
FST		field support terminal
FSU		Florida State University (Tallahasee)
FT		Free troposphere
FTIR		Fourier transform infrared
FTIR		Fourier transform infrared radiometer (spectroscopy)
FTP		file transfer protocol
FTP/A		field task proposal/agreement
FTS		Fournier transform spectrometer
FTS		full turbulence simulation
FTS		file transfer system
FTU		Formazin turbidity unit
FUA		Fuel Use Act
FW		filter wheel
FWCA		Fish and Wildlife Coordination Act (1958)
FWM		food web model
FWP		Field Work Proposal
FWPCA		Federal Water Pollution Control Act (1972)
FWS		United States Fish and Wildlife Service
FWWTA		Fraction of waste water treated anaerobically
FY		fiscal year

G

G-1		Gulfstream-1 (airplane)
G-7		Group of Seven (Canada, France, Germany, Italy, Japan, United Kingdom,
		United States 
g		gram
GA		geographic analysis
GAC		global area coverage
GAGE		Global Atmospheric Gases Experiment
GAIM		Global Analysis, Interpretation, and Modelling
		(IGBP)
GH		Gas Heater
GALE		Genesis of Atlantic Lows Experiment
GAME		GEWEX-related Asian Monsoon Experiment
GAMETAG		Global Atmospheric Measurements Experiment of Tropospheric
		Aerosols and Gases
GARP		Global Atmospheric Research Program (WMO, ICSU, and NOAA)
GATE		GARP Atlantic Tropical Experiment
GATE		Global Atmosphere Tropical Experiment
GATT		General Agreement on Tariffs and Trade
GAW		Global Atmosphere Watch (WMO)
GBF/DIME	Geographic Base Files/Dual Independent Map Encoding (U.S. Census Bureau)
Gbps		gigabits per second
GBSRN		Global Baseline Surface Radiation Network
GC		gas chromatography (chromatograph)
GCC		global change category
GCCD		Global Climate Change Digest (CEI)
GCDB		Geographic Coordinates Data Base
GCDIS		Global Change Data and Information System
GCEP		Global Change Education Program
GCHC		Gulf Coast Hydroscience Center (USGS)
GCIP		GEWEX
		Continental-Scale International Project
GCM		General (global) Circulation Model
GCM		Global Climate Model
GC/MS		gas chromatography/mass spectrometry
GCO		Generation Certification Official (waste generation)
GCOS		Global Climate Observing System (WMO, IOC, UNEP, and ICSU)
GCP		Ground Control Point
GCPI		Cape Grim Photochemical Intensive (CSIRO)
GCRIO		Global Change Research Information Office
GCRP		Global Change Research Program
GCSS		GEWEX Cloud System Study
GCSS		Global Cloud Systems Study
GCTE		Global Change in Terrestrial Ecosystems
		(program) (IGBP)
GCTE-SSC	GCTE Scientific Steering Committee
GCTM		Global Chemical Transport Model
GCV		gross calorific value
GDAAC		Goddard Distributed Active Archive Center
GDAS		Grimco data acquisition system
GDC 		Global Data Centre
GDP		gross domestic product
GDPS		Global Data-Processing System (WMO and WWW)
GDSIDB		Global Digital Sea-Ice Data Bank (WMO/CMM)
GDR		Geophysical Data Record
GDR		German Democratic Republic (now Germany)
GE		General Electric
GEBA		Global Energy Balance Archive
GEC		global environment change
GEDEX		Greenhouse Effect Detection Experiment
GEF		Global Environment Facility (WB, UNDP, and UNEP)
GEF		Global Environmental Fund
GEIA		Global Emissions Inventory Activity (IGAC)
GEISA		Gestion et d'Etude des Information Spectroscopiques Atmospheriques
GEM		Geospace Environment Modeling
GEM-HEX		Geochemical, Microbiological, and Hydrological Experiment
GEMS		Global Environmental Monitoring System (UNEP)
GENESIS		Global Environmental and Ecological Simulation of Interactive Systems
GENIE		Global Environmental Network for Information Exchange
GENLEAF		generic models of leaf response
GEO		Geostationary Earth Observation
GEOM		geographically detailed model
GEOS		Geodynamics Experimental Ocean Satellite
Geos-3		Geodetic Satellite Mission (NASA)
Geosat		Geologic Satellite (program) (USN)
Geosat		Geodesy satellite (USN)
GEOSECS		Geochemical Ocean Sections Study
GER		Global Environmental Research (U.K.)
GERG		Global Environment Research Group
GESAMP		Group of Experts on the Scientific Aspects of Marine Pollution
GEWEX		Global Energy and Water Cycle Experiment
		(WCRP)
GF3		General Format No. 3
GFDL		Geophysical Fluid Dynamics Laboratory (NOAA)
GFDL		Goddard Fluid Dynamics Laboratory
GFLOPS		one gigaflop equals 1 billion (109) floating point operations
		per second (measure of computer processing capability)
GFO		Geosat follow-on
GGI		GPS geoscience instrument
GGI		greenhouse-gas indices
GGS		global geospace science
GHCN		Global Historical Climatology Network
GHG		greenhouse gas(es)
GHz		gigahertz
GIF		Graphical Interchange Format
GIM		Global Integration and Modeling (IGAC)
GIMMS		Global Inventory Modeling and Monitoring Study
GIS		geographic information system (a system for
		management, manipulation, analysis, and display of spatial data)
GISMO		graphic-information-system modeling
GISP		Greenland Ice Sheet Project (NSF and PAGES)
GISP2		Greenland Ice Sheet Project
GISP II		Second Greenland Ice Sheet Project (U.S.)
GISS		Goddard Institute for Space Studies (NASA) 
GIT		gastrointestinal tract
GIT		Georgia Institute of Technology (Atlanta)
GJ		giga (109) joule
GL		Geophysics Laboratory
GLAS		Geoscience Laser Altimeter System (formerly
		GLRS-A)
GLAS		Goddard Laboratory of Atmospheric Sciences
GLBC		Great Lakes Basin Commission
GLI		global imager
GLIS		Global Land Information System
GLL		Galileo
GLOBE		Global Land One kilometer Base Elevation (DIS)
GLOBE		Global Learning and Observations to Benefit the Environment
GLOBEC		Global Ocean Ecosystems Dynamics (SCOR)
GLOBEC		Global Marine Ecosystem Dynamics (program)
GLOCARB		Global Tropospheric Carbon Dioxide Network (IGAC)
GLOCHANT	Global Change Research in the Antarctic (SCAR)
GLOCHEM		Global Atmospheric Chemical Survey (IGAC)
GloED		Global Emissions Database
GLONET		Global Tropospheric Ozone Network (IGAC)
GLOSS		Global Sea-Level Observing System (IOC)
GLRC		Great Lakes Research Center (LSC and NOAA)
GLRD		Great Lakes Research Division
GLRS		Geoscience Laser Ranging System
GLRS-A		Geoscience Laser Ranging System-Altimeter
		(now GLAS)
GLRS-R		Geoscience Laser Ranging System-Ranger
GMCC		Geophysical Monitoring for Climate Change (now CMDL)
GMDSS		Global Maritime Distress and Safety System (IMO)
GMP		genetically modified plants
GMS		Geostationary Meteorological Satellite (Japan)
GMSC		Geologic Map Standards Committee (USGS)
GMT		Greenwich Mean Time
GNIS		Geographic Names Information System (USGS)
GNP		Gross National Product
GNO		Gross Product Originating
GO3OS		Global Ozone Observing System (WMO)
GOALS		Global Ocean-Atmosphere-Land System (program)
GOED		Global Oceans Ecosystems Dynamics
GOES		Geostationary Operational Environmental
		Satellite
GOES		Geosynchronous Operational Environmental Satellite
GOES		Global Oceans Ecosystems Dynamics
GOES		Global Omnibus Environmental Survey (HDGEC)
GOEZS		Global Ocean Euphotic Zone Study (IGBP, SCOR, and WCRP)
GOF		Global Ocean Flux
GOFS		Global Ocean Flux Study
GOI		government of India
GOIN		Global Observation Information Network
GOME		Global Ozone Monitoring Experiment
GOMI		Global Ozone Monitoring Instrument
GOMOS		Global Ozone Monitoring by Occultation of Stars
GOMR		global ozone monitoring radiometer
GONG		Global Oscillation Network Group
GOOS		Global Ocean Observing System (IOC, UNESCO, WMO, and ICSU)
GOOS		Global Ozone Observing System (IOC, UNESCO, WMO, and ICSU)
GOP		Geographical Observatories Programme
GOS		Global Observing System (WMO and WWW)
GOS		:Geomagnetic Observing System
GPC		Global Processing Center
GPCC		Global Precipitation Climatology Center (data base)
GPCP		Global Precipitation Climatology Project
GPI		GOES Precipitation Index
GPO		Government Printing Office (U.S.)
GPS		Global Positioning System
GPSDR		Global Positioning System Demonstration Receiver
GR		growth rate
GRADO		CNES Gravity Satellite (France)
GRASS		Geographic Resources Analysis Support System (U.S. Army Corps of Engineers)
GRDC		Global Runoff Data Centre
GRECA		Group of Experts on Accident Consequences (NEA and OECD)
GREENS		Global Redevelopment with Energy Environment Sustainability
GREENTIE	Greenhouse Gas Technology Information Exchange
GRGS		Groupe de Recherches de Geodesic Spatiale (France)
GRID		Global Resource Information Database (UNEP)
GRIP		Greenland Icecore Project (PAGES) (Europe)
GRIMCO		CGBAPS computing system
GRM		NASA Gravity Satellite (U.S.)
GRO		Gamma Ray Observatory (NASA)
GSA		General Services Administration
GSA		Geological Society of America
GS&M		Modeling (task team)
GSC		Geological Survey of Canada (DEMR)
GSF		Gesellschaft fur Strahlen und Umweltforschung mbH Munchen (Germany)
GSFC		Goddard Space Flight Center (NASA)
GSL		Gulf Stream Locale
GSMNP		Great Smoky Mountains National Park
GSN		Global Seismic Network
GSP		Greenland Sea Project
GSPDC		Geostationary Satellite Precipitation Data Centre
GSRN		Global Surface Radiation Network
Gt		gigaton (1,000 million tons)
GtC		gigatons (or gigatonnes) of carbon
GTCC		Gas Turbine Combined Cycle
GTCE		Global Tropospheric Chemistry Experiment
GTE		Global Tropospheric Experiment
GTOS		Global Terrestrial Observing System
GTS		Global Telecommunications System (WMO and
		WWW)
GUI		graphical user interface
GVap		GEWEX Water Vapor Project ("GvaP"is
		preferred)
GVaP		GEWEX Water Vapor Project (preferred over
		"GVap")
GW		Gigawatt
GWE		Global Weather Experiment
GWh		giga watt hour
GWP		greenhouse (global) warming potential

H

H-1211		Halon 1211; CBrClF2
H-1301		Halon 1301; CBrF3
H2		hydrogen
H2O		water
H2O2		hydrogen peroxide
ha		hectare
HAAP		high-altitude aerial photograph
HAE		height above ellipsoid
HAGE		human activity and global environment
HALOE		Halogen Occultation Experiment
HALSS		high-altitude lidar sensing station
HAMOCC		Hamburg Ocean Carbon Cycle Model
HAO		High Altitude Observatory (NCAR)
HAP		hazardous air pollutant
HAPEX		Hydrological-Atmospheric Pilot Experiment
		(GEWEX)
HAPEX-MOBILHY	HAPEX-MOdelisation du BILan
		Hydrique
HARM		Hazard Assessment Rating Methodology
HASL		Health and Safety Laboratory
HASP		High Altitude Sampling Program
HBJ		Hazira-Bijapur-Jagdishpur (India)
HBL		Hudson Bay Lowland
HBr		hydrogen bromide
HBW		half band-width
HCBP		hexachlorobiphenol
HCCD		Historical Canadian Climate Database
HCFC		hydrochlorofluorocarbon
HCFC-141b	hydrochlorofluorocarbon-141b (CH3CCl2F)
HCFC-142b	hydrochloroflourocarbon-142b (CH3CClF2)
HCFC-22		hydrochloroflourocarbon-22 (CHClF2,
		chlorodifluoromethane)
HCHO		formaldehyde (also written as CH2O)
HCl		hydrogen chloride
HCMM		Heat-Capacity Mapping Mission
HCMM/AEM-1	HCMM/Applications Explorer Mission-1
HCMR		heat-capacity mapping radiometer
HCN		Historical Climatology Network
HCN		hydrogen cyanide
HCND		Historical Climatology Network-Daily
HD		hierarchical diagnosis
HDF		hierarchical data format
HDGCB		Human Dimensions of Global Change (programme) (UNU, ISSC, and IFIAS)
HDGEC		Human Dimensions of Global Environmental
		Change (programme) (ISSC)
HDP		Human Dimensions Program (SEDAC)
HDP		Human Dimensions of Global Environmental
		Change Program (ISSC)
HDRL		High-Dose Reference Laboratory
HDTV		High-Definition Television
HEC		Hydro-Electric Commission (Tasmania)
HECP		Herbaceous Energy Crops Program
HEIFE		Heihe River Field Experiment
HELCOM		Helsinki Commission
HEM		Harmonizations of Environmental Measurement (program)
HESS		High Latitude Ecosystems as Sources and Sinks of Trace Gases (IGAC)
HEW		Health, Education, and Welfare
HF		hydrogen fluoride
HFC		hydrofluorocarbon
HGCC		Hot Gas Clean Up
HHMS		Hydrostatic Head Monitoring Station
HHS		Department of Health and Human Services
HHV		Higher Heating Value (thermal efficiency basis)
HI		human interactions
HIC		Habitat International Coalition
HILDA		high-latitude diffusive-advective model
HIMSS		high-resolution microwave spectrometer
		sounder (now MIMR)
HIRDLS		high-resolution dynamics limb sounder
HIRIS		high-resolution imaging spectrometer
HIRS		high-resolution infrared radiation sounder
HIS		high-resolution interferometer sounder
HIS		high-spectral resolution interferometer sounder
HITRAN 		High Resolution Transmission Molecular Absorption Database
HLQ		holocellulose/lignocellulose quotient
HLW		high-level waste
HMCRI		Hazardous Materials Control Research Institute
HMMR		high-resolution multifrequency microwave radiometer
HMSU		high-resolution microwave sounding unit
HMTA		Hazardous Materials Transportation Act
HMW		high molecular weight
HNO3		nitric acid
HNRC		HOMS National Reference Centre
HOC		hydrophobic organic compounds
HOCl		hypochlorous acid
HOMS		Hydrological Operational Multipurpose
		Subprogramme (OHP and WMO)
HOT		Hawaii ocean time (series)
HOx		odd hydrogen (OH and H2O2)
HP		health physicist
HP		health physics
HP		Hewlett-Packard (gas chromatograph manufacturer) 
HP		High Pressure
HPCC		High Performance Computing and Communications
HPCRC		High Performance Computing Research Center (ORNL)
HPD		Hydrometeorological Processes Division
HPLC		high-precision liquid chromatography
HPLC		high-pressure liquid chromatograph/chromatography
HPS		Health Physics Society (Bethesda, Maryland)
HQ		headquarters
HRDI		high-resolution Doppler imager
HRE		Homogeneous Reactor Experiment (impoundment)
HRIRS		high-resolution infrared radiation sounder
HROI		high-resolution optical instrument
HRPT		high-resolution picture transmission (AVHRR)
HRS		Hazard Ranking System (EPA)
HRSG		Heat Recovery Steam Generator
HRV		high resolution video (SPOT)
HRV		high resolution visible
HSA		Historic Sites Act (1935)
HSL		Hazardous Substance List (EPA)
HSRL		High Spectral Resolution Lidar
HSRP		High Speed Research Program
HST		Hawaii standard time
HST		Hubble Space Telescope
HSWA		Hazardous and Solid Waste Amendments (1984)
html		hypertext markup language
http		hypertext transport protocol
HTW		High Temperature Winkler gasifier
HUD		Department of Housing and Urban Development (U.S.)
HUMICAP		Humidity sensor on drifters (FASINEX)
HVI		high-volume impactor
HVS		high-volume sampler
HWRP		Hydrology and Water Resources Programme (WMO)
HYNET		Intercomparison of Operational Hydrological Network Design
		Techniques
Hz		hertz (cycles per second)

I

3I		improved initialization inversion
IAA		International Academy of Astronautics
IABO		International Association of Biological Oceanography (ICSU)
IABP		International Arctic Buoy Programme
IAC		International Activities Committee
IACG		Interagency Committee on Geomatics (DEMR)
IACGEC		Inter-Agency Committee on Global Environmental Change
IAEA		International Atomic Energy Agency (UN)
IAEG		International Association for Engineering Geology
IAF		International Astronautical Federation
IAG		International Association of Geodesy (IUGG)
IAGA		International Association of  Geomagnetism and Agronomy (IUGG)
IAGC		International Association of Geochemistry and Cosmochemistry
IAH		International Association of Hydrogeologists (IUGS)
IAHR		International Association for Hydraulic Research
IAHS		International Association of Hydrological
		Sciences (IUGG)
IAI		Inter-American Institute for Global Change Research (START)
IAL		International Association of Theoretical Applied Limnologists
IAMAP		International Association of Meteorology and
		Atmospheric Physics (IUGG)
IAMAP-IAHS	IAMAP-International Association of
		Hydrological Sciences (IUGG)
IAMAS		International Association of Meteorology and
		Atmospheric Sciences (IUGG and ICSU)
IAOPA		International Aircraft Owners and Pilots Association
IAP		Institute of Atmospheric Physics
IAPSO		International Association for Physical Sciences of the Ocean (IUGG and ICSU)
IAR		Institute for Atmospheric Radioactivity (Feiberg, Germany)
IAS		Image Analysis System
IASC		International Arctic Sciences Committee
IASI		infrared atmospheric sounding instrument
IASI		improved atmospheric sounding interferometer
IASI		infrared atmospheric sounding interferometer
IASPEI		International Association of Seismology and Physics of the Earth's
		Interior (IUGG)
IASTED		International Association of Science and
		Technology for Development
IATA		International Air Transport Association
IATUL		International Association of Technological University Libraries
IAU		International Astronomical Union
IAVCEI		International Association of Volcanology and Chemistry of the Earth's
		Interior (IUGG)
IAWPRC		International Association on Water Pollution Research and Control
IBM		International Business Machines (Corp.)
IBM PC		International Business Machines Personal Computer
IBP		International Biological Programme (ICSU)
IBP		International Biophysical Program
IBRD		International Bank for Reconstruction and Development
IBSRAM		International Board for Soil Research and Management
IBSS		Institute of Biology of the Southern Seas (Russian Federation; 
		formerly U.S.S.R.)
IBWC		International Boundary and Water Commission (Independent; U.S. and Mexico)
IC		industrialized country
IC		interaction coefficient
IC		Intergovernmental Council
IC		ion chromatography
ICA		International Communication Agency
ICACGP		International Commission on Atmospheric
		Chemistry and Global Pollution (IAMAS)
ICALPE		International Centre for Alpine Environments (Chambery, France)
ICAO		International Civil Aviation Organization
ICAR		Indian Council of Agricultural Research
ICAR		International Center for Action Research
ICARDA		International Center for Agricultural Research in Dry Areas
ICARUS		Interagency Climate-Aerosol Radiative Uncertainties and Sensitivities
		(Program)
ICAS		International Council of the Aeronautical Sciences
ICASVR		International Committee on Atmosphere-Soil-Vegetation Relations
		(IAHS)
ICC		Instrument Control Center
ICCE		International Commission on Continental Erosion (IAHS)
ICDB		Ice Core Data Bank
ICE		International Cirrus Experiment
ICE		International Cometary Explorer
ICEAR		International Centre for Equatorial Atmospheric Research (Indonesia)
ICES		International Council for the Exploration of the Seas
ICF		Instrument Control Facility
ICGW		International Commission on Ground Water (IAHS)
ICIC		Intercalibrations-Intercomparisons (IGAC)
ICICI		Industrial Credit and Investment Corporation of India
ICID		International Commission on Irrigation and Drainage
ICIMOD		International Centre for Integrated Mountain Development for the
		Hindu-Kush Himalayan Region (Katmandu, Nepal)
ICIP		International Conference on Image Processing
ICL		integrated cloud liquid
ICL		International-Union Commission on the Lithosphere (ICSU)
ICLD		International Commission on Large Dams
ICN		ice condensation nuclei
ICOLD		International Commission on Large Dams
ICP		inductively coupled plasma emission (spectroscopy)
ICP/MS		inductively coupled plasma/mass spectrometry
ICP-OES		inductively coupled plasma--optical emission spectroscopy
ICPP		Idaho Chemical Processing Plant
ICRAF		International Council for Research in Agroforestry
ICRCCM		Intercomparison of Radiation Codes in Climate Models (program)
ICRM		International Committee on Radionuclide Meteorology
ICRP		International Commission on Radiological Protection
ICRSDT		International Committee on Remote Sensing and Data Transmission
		(IAHS)
ICRU		International Commission on Radiological Units
ICSC		International Civil Service Commission
ICSD		International Continental Scientific Drilling (program)
ICSI		International Commission on Snow and Ice (IAHS)
ICSTI		International Council for Scientific and Technical Information
ICSU		International Council of Scientific Unions
ICSU-ACE	ICSU Advisory Committee on the Environment
ICSW		International Commission on Surface Water (IAHS)
ICTP		International Centre for Theoretical Physics
ICWG		International Coordination Working Group
ICWQ		International Commission on Water Quality (IAHS)
ICWRS		International Commission on Water Resources Systems (IAHS)
IDA		International Development Agency
IDASS		Integrated Data Assimilation and Sounding System
IDB		Inter-American Development Bank
IDCCC		Interior Department Cartographic Coordinating Committee (DOI)
IDCS		Image Dissector Camera System
IDDSAC		Interim Data Documentation Standard for ARC/INFO Averages
IDEAL		International Decade for the East African Lakes (project) (PAGES)
IDNDR		International Decade for Natural Disaster Reduction
IDP		Instrument Development Program
IDRI		Thailand Development Research Institute
IDS		interdisciplinary science
IDSS		Integrated Data Sounding System
IDRI		Thailand Development Research Institute
IEA		Institute of Energy Analysis
IEA		International Energy Agency
IEA/ORAU	Institute of Energy Analysis/Oak Ridge Associated Universities
IEC		Implementation and Effectiveness of International Environmental
		Commitments
IEE		Institution of Electrical Engineers
IEEE		Institute of Electrical and Electronics Engineers, Inc. 
IEEE		Institute for Electronics and Electrical Engineering
IELV		intermediate expendable launch vehicle
IEM		Institute of Experimental Meteorology
IEOS		International Earth Observing System
IERS		International Earth Reference System
IERS		International Ellipsoid Reference System
IEW		International Energy Workshop
IFAD		International Fund for Agricultural Development (UN)
IFDC		International Fertilizer Development Center
IFE		Institute for Energy Technology (Norway)
IFIAS		International Federation of Institutes for
		Advanced Study
IFIM		Instream Flow Incremental Methodology (U.S. Fish
		and Wildlife Service)
IFMH		Institut fur Meereskunde, Hamburg, Germany
IFMK		Institut fur Meereskunde, Kiel, Germany
IFN		Ice-freezing nuclei
IFO		intensive field observation
IFOV		instantaneous field of view
IFRB		International Frequency Registration Board
IFREMER		Institut Francais de Recherche pour l'Exploration de la Mer
IFRTP		Institut Francais pour la Researche et la Technologie Polaire (French
		Institute for Polar Research Technology)
IFS		Integrated Forest Study on the Effects of Atmospheric Deposition
IFS		International Foundation for Science
IFU		Fraunhofer Institute for Atmospheric Environmental Research (Germany)
IFYGL		International Field Year for the Great Lakes (IHD)
IG		Institute of Geography
IGAC		International Geosphere-Biosphere Programme
IGAC		International Global Atmospheric Chemistry
		(Program) (IGBP and ICACGP)
IGAC-SSC	IGAC Scientific Steering Committee
IGAP		International Global Aerosol Program
IGBP		International Geosphere-Biosphere Programme
		(ICSU)
IGBP-DIS	IGBP Data and
		Information System
IGC		International Geophysical Cooperation
IGCC		Integrated Gasification Combined Cycle
IGCP		International Geological Correlation Programme (IUGS and UNESCO)
IGEA		International Group of Funding Agencies for Global Change Research
IGFA		Inter-Governmental Funding Agencies
IGFA		International Group of Funding Agencies (for Global Change Research)
IGLD		International Great Lakes Datum
IGN		Institut Geographique National
IGO		Intergovernmental Organization
IGOSS		Integrated Global Ocean Services System (WMO/IOC)
IGOSS		Integrated Global Ocean Station System (UNESCO)
IGPO		International GEWEX Project Office
IGRSS		International Geoscience and Remote Sensing Society
IGS		International Glaciological Society
IGT		Institute of Gas Technology (Chicago)
IGU		International Geographical Union (ICSU)
IGY		International Geophysical Year (1 July 1957 - 31 December 1958)
IHB		International Hydrographic Bureau
IHD		International Hydrological Decade (UNESCO)
IHO		International Hydrographic Organization
IHP		International Hydrological Program (UNESCO)
IHS		International Heliospheric Study
IHSS		International Humic Substances Society
II		interdisciplinary investigator
IIASA		International Institute for Applied Systems Analysis (Vienna)
IIG		Indian Institute of Geomagnetism
IIID		International Institute of Information Design
IIOE		International Indian Ocean Expedition
IISL		International Institute of Space Law
IITM		Indian Institute for Tropical Meteorology
IJC		International Joint Commission (Independent; Canada and U.S.)
ILAS		Improved Limb Atmospheric Spectrometer
ILO		International Labor Organization
ILWAS		Integrated Lake-Watershed Acidification Study (EPRI)
IMA		Information Management and Archives (Office)
IM-Al		inorganic monomeric aluminum
IMAGE		Integrated Model to Assess the Greenhouse Effect
IMAGES		International Marine Global Change Study (PAGES and SCOR)
IMB		Investigator of Micro-Biosphere
IMC		ice mass content
IMCO		Inter-Governmental Maritime Consultative Organization
IMD		India Meteorological Department
IMF		ice mass flux
IMF		International Monetary Fund
IMG		Interferometric Monitor for Greenhouse Gases
IMO		International Maritime Organization
IMO		International Meteorological Organization (formerly WMO)
IMOP		Instruments and Methods of Observation Programme (WMO)
IMP		ice mass path
IMS		Information Management Services
IMS		Information Management System
IMS		International Mountain Society
IMU		International Mathematical Union
IN		ice nuclei
in.		inch
Inc.		Incorporated
INC		Intergovernmental Negotiating Committee (for a Framework Convention on
		Climate Change)
INC		International Negotiating Convention 
INCD		International Convention to Combat Decertification
IND		Industrial Metabolism Project
INDIGO		French programme, Indien Gaz Ocean
INEL		Idaho National Engineering Laboratory
INFOCLIMA	World Climate Data Information and Referral System
INFOTERRA	International Referral System for Sources of Environmental Information (UNEP)
INPA		Instituto Nacional de Pesquisas da Amazona (Brazil)
INPE		Brazilian Institute for Space Research (Brazil)
INPE		Instituto Nacional de Pesquisas Espacialis Brazilian (Brazil) 
INQUA		International Union for Quaternary Research
INRA		Institut National de Recherche Agronomiques (France)
INS		inertial navigation system
INS		Institute Scholars
INSA		Institut National des Sciences Appliques (France)
INSAT		Indian Satellite
INSTARR		Institute for Arctic and Alpine Research (University of Colorado, Boulder)
INSULA		International Scientific Council for Island Development (NGO)
INT		p-iodonitrotetrazolium
INTECOL		International Association of Ecology (ICSU
		and IUBS)
INZN		Institut Zairois pour la Conservation de la Nature
I/O		input/output
IO		input/output
IOB		Inter-Organization Board for Information Systems and Related Activities
IOC		Intergovernmental Oceanographic Council (UNESCO)
IOC		Intergovernmental Oceanographic Commission (UNESCO)
IOC		International Ozone Commission
IOCARIBE	IOC Sub-Commission for the Carribbean and Adjacent Regions
IODE		International Oceanographic Data/Information Exchange (IOC)
IOP		intensive observing period
IOPG		Indian Ocean Planning Group (JGOFS)
IOS		Institute of Ocean Sciences (Canada)
IP		independent pixel
IP		Internet Protocol
IPB		Bogor Agriculture Institute (Indonesia)
IPCC		Intergovernmental Panel on Climate Change (WMO and UNEP)
IPCC-EIS	IPCC-Energy and Industry Subgroup
IPCC/RSWG/EIS	IPCC/Response Strategies Working
		Group/Energy and Industry Subgroup
IPEI		Ionospheric Plasma and Electrodynamics Instrument
IPMS		International Polar Motion Service
IPO		WOCE International Planning Office
IPOC		International Partner Operations Center
IPR		Intellectual Property Right
IPS		Inter Press Service
IPV		isentropic potential vorticity
IQSY		International Quiet Sun Years
ir		infrared (preferred over "IR")
IR		Infrared ("ir" is preferred)
IRAP		Interdisciplinary Panel on Climate Change
IRC		International Radiation Commission
IRD		Instituto de Radioprotecao e Dosimetria (Brazil)
IRF		instantaneous radiative transfer
IRGA		infrared gas analyzer
IRI		International Reference Ionosphere
IRIS		Incorporated Research Institution for Seismology
IRIS		infrared interferometer spectrometer
IRIS		integrated radar imaging system
IRP		Installation Restoration Program
IRRI		International Rice Research Institute
IRSS		Indian Remote Sensing Satellite
IRSSP		Interactive Remote Sensing Software Package
IRTM		infrared thermal mapper
IRTS		infrared temperature sounder
IS92 		IPCC Scenarios, 1992
IS		Image Subtraction
ISA		Israel Space Agency
ISA		Italian Space Agency
ISAMS		improved stratospheric and mesospheric sounder
ISAR		Intelligent Synthetic Aperture Radar
ISAS		Institute of Space and Astronautical Science (Japan)
ISC		International Seismological Centre
ISCCP		International Satellite Cloud Climatology
		Program (WCRP) 
ISEATRA		International Symposium on Ecological Aspects of Tree-Ring Analysis
ISEB 10		Tenth International Symposium on Environmental Biogeochemistry
ISEE		International Sun-Earth Explorer
ISEM		International Society for Ecological Modelling
ISFA		International Scientific Film Association
ISI		International Statistical Institute
ISLSCP		International Satellite Land-Surface
		Climatology Project (GEWEX and WCRP)
ISO		International Standards Organization
ISOS		International Southern Ocean Studies
ISP		International Society for Photogrammetry
ISPRS		International Society for Photogrammetry and Remote Sensing
ISPs		Integrated Steel Plants
ISRIC		International Soil Reference and Information Centre
ISRO		Indian Space Research Organization
ISS		integrated sounding system
ISSC		International Social Science Council
ISSP		ICSU Solar System Panel
ISSS		International Society of Soil Science
ISSMFE		International Society of Soil Mechanics and Foundation Engineering
IST		Instrument Support Terminal
ISTAP		International Space Technology Assessment Program
ISTP		International Solar Terrestrial Physics
ISU		International Space University
ISWS		Illinois State Water Survey
ISY		International Space Year (1992)
ITASE		International Trans-Antarctic Scientific Expedition (PAGES)
ITB		Bandung Institute of Technology (Indonesia)
ITB		Intergovernmental TOGA Board
ITC		International Institute for Aerospace Survey and Earth Sciences
ITCZ		Intertropical Convergence Zone
ITE		Institute of Terrestrial Ecology (NERC)
ITEM		International Technology Environmental (data base) Management (system)
ITEX		International Tundra Experiment (USMAB
		Directorate on High Latitude Ecosystems)
ITIR		infrared thermal imaging radiometer (now ASTER)
ITIR		intermediate and thermal infrared radiometer
ITOS		Improved TIROS Operational System
ITOY		International Tropospheric Ozone Year
ITPO		International TOGA Planning Office
ITPP		International TOVS Processing Package
ITPR		infrared temperature profile radiometer
ITRA		intercomparison of transmittance and radiance algorithms
ITRC		Industrial Toxicology Research Centre
ITRDB		International Tree-Ring Data Bank
ITSC		International TOVS Study Conference
ITU		integrated terrain unit
ITU		International Telecommunication Union
IUAES		International Union of Anthropological and Ethnological Sciences
IUB		International Union of Biochemistry (ICSU)
IUBMB		International Union of Biochemistry and Molecular Biology
IUBS		International Union of Biological Sciences (ICSU)
IUCAF		Inter-Union Commission on Frequency Allocation for Radio Astronomy
		and Space Science
IUCC		Information Unit on Climate Change
IUCN		International Union for the Conservation of
		Nature and Natural Resources (now World Conservation Union) (Switzerland)
IUCr		International Union of Crystallography
IUCRM		Inter-Union Commission on Radio Meteorology
IUCS		Inter-Union Commission on Spectroscopy
IUE		international ultraviolet explorer
IUFRO		International Union of Forestry Research Organizations (Secretariat,
		Schonbruan, Vienna)
IUGG		International Union of Geodesy and Geophysics
		(ICSU)
IUGS		International Union of Geological Sciences (ICSU)
IUHPS		International Union of the History and Philosophy of Science
IUNS		International Union of Nutritional Sciences
IUPAB		International Union for Pure and Applied Biophysics (ICSU)
IUPAC		International Union of Pure and Applied
		Chemistry (ICSU)
IUPAP		International Union of Pure and Applied Physics (ICSU)
IUPHAR		International Union of Pharmacology
IUPS		International Union of Physiological Sciences
IUPsyS		International Union of Psychological Science
IUR		International Union of Radioecologists
IUTAM		International Union of Theoretical and Applied Mechanics (ICSU)
IVA		intra vehicular activities Instituto Venezuelan de Investigaciones Cientificas
IVL		Swedish Environmental Research Institute
IV&V		independent verification and validation
IWC		Ice water content
IWG		Investigators Working Group
IWGDMGC		Interagency Working Group on Data Management for Global Change
		(U.S.)
IWP		Ice water path
IWRA		International Water Resources Association
IWSA		International Water Supply Association
IZMIRAN		Institute of Terrestrial Magnetism, Radio Research, and the Ionosphere
		(Academy of Sciences) (Russian Federation; formerly U.S.S.R.)

J

JASIN		Joint Sea-Air Interaction Experiment
JASON		Scientific panel (MITRE Corporation
JAWS		Joint Airport Weather Studies (project)
JECOR		U.S.-Saudi Arabian
		Joint Commission of Economic Cooperation
JEDA		Joint Environmental Data Center
JEE 		Japan Environment Agency
JEM		Japanese Experiment Module
JEOS		Japanese Earth Observing System
JEOS		Japanese Earth Observing Satellite
JERS-1		Japanese Earth Remote-sensing Satellite-1
JERS		Japanese Earth Resources Satellite (JPOP)                                                                                                                    
JGOFS		Joint Global Ocean Flux Study (program) (IGBP and SCOR)
JGOFS GS	JGOFS Global Synthesis 
JGOFS PM	JGOFS Photosynthetic Measurements (task
		team)
JGOFS-SSC	JGOFS Scientific Steering Committee
JI		Joint Implementation
JICST		Japan Information Center of Science and Technology
JIN		Joint Implementation Network
JIU		joint inspection unit
JJA		June-July-August
JMA		Japan Meteorological Agency
JOC		Joint Organizing Committee
JOI		Joint Oceanographic Institutions (Inc.)
JPL		Jet Propulsion Laboratory (California Institute of Technology) (NASA)
JPOP		Japanese Polar-Orbiting Platform (JERS)
JSC		Johnson Space Center
JSC		Joint Scientific Committee (ICSU, WCRP, and WMO)
JSC-WCRP	Joint Scientific Committee for the WCRP (ICSU and WMO)
JST		Japan Standard Time
JTC		joint transfer correlation
JTU		Jackson turbidity unit

K

K		kelvin, unit of thermodynamic temperature (the number of kelvins equals the
		number of degrees Celsius plus 273.15)
ka		thousands of years
KAHE		time series station off Kahe Point, Hawaii
kbps		kilobits per second
KEEP		Kuroshio Edge Exchange Processes
KERFIX		Kerguelen fixed station (France) (JGOFS)
keV		kilo electron volts
kg		kilogram
kHz		kilohertz
kJ		kilojoule (energy measure)
km		kilometer
KNMI		Royal Netherlands Meteorological Institute
Kow		octanol-water partition coefficient
kPa		kiloPascal (pressure above ambient (100 kPa = 1 atmosphere excess))
Kr		krypton
KSC		Kennedy Space Center (NASA)
KUM		Cape Kumukahi, Hawaii
kW		kilowatt
kWh		kilowatt hours (3.6 million joules)
kyr		kiloyear

L

L/C		land cover
L		liter
LAC		levelized annual cost
LAC		local area coverage
LAF		Lake Acidification and Fisheries (EPRI)
LAGCM		general circulation model at Los Alamos National Laboratory (LANL)
LAGEOS		Laser Geodynamics Satellite
LAI		leaf area index
LAID		land-atmosphere interactions dynamics
LAMBADA		Large-scale Atmospheric Moisture Balance of Amazona using Data
		Assimilation (BAHC and GEWEX)
LAMP		Lake Acidification Mitigation Project (EPRI)
LAN		local area network
Landsat		Land Remote-Sensing Satellite (formerly
		ERTS) (NASA)
Landsat		land satellite (photographs of the ground)
LANL		Los Alamos National Laboratory
LANL/ACL	Los Alamos National Laboratory's Advanced Computing Laboratory
LAPAN		National Institute for Aeronautics and Space (Indonesia)
LaRC		Langley Research Center (NASA)
LASE		Lidar Atmospheric Sensing Experiment
LASER		light amplification by stimulated emission of radiation
LASR		Library Access, Search, and Retrieval
LASS		Local Area Sounding System
lat.		latitude
LAWS		laser atmospheric wind sounder
LBL		Lawrence Berkeley Laboratory (University of California)
LBL		line-by-line
LBLRTM		line-by-line radiative transfer model
LCC		land cover change
LCL		lifting condensation level
LDC		less-developed country
LDEO		Lamont-Doherty Earth Observatory
LDGO		Lamont-Doherty Geological Observatory
LDR		linear depolarization ratio
LEADEX		Leads Experiment
LEAPS		Low Electron Attachment Potential Species
LEBS		Low Emission Boiler Systems
LEFI		local electric field instrument
LEMA		Long-term Ecological Modelling Activity (GCTE)
LERTS		Laboratoire d'Etudes et de Recherches en Teledetection Spatiale (France)
LES		Lincoln Experimental Satellite
LFM		limited fine-mesh model
LGM 		Last Glacial Maximum
LHV		Lower Heating Value
LI		library
Lidar		laser-radar
Lidar		light detection and ranging (instrument)
LIDQA		Landsat Image Data Quality and Analysis
LIGA		Last InterGlacial in the Arctic (project)
LIMS		Limb Infrared Monitor of the Stratosphere
LIPI		Marine Pollution Monitoring Center (including LIPI's Network of the Center
		for Research and Development in Oceanography)
LIPI		Minister of State for Population and Research Environment (Indonesia)
LIPI		The Indonesian Institute of Sciences
LIRAD		lidar/radiometer
LIS		land information system
LIS		lightning imaging sensor
LITE		Lidar In-Space Technology Experiment
LLL		Lawrence Livermore National Laboratories
LLNL		Lawrence Livermore National Laboratory
LLW		low-level waste
LMA		Laboratoire de Meteorologie
LMD		Laboratoire de Meteorologie Dynamique
LMER		Land Margins Ecosystem Research
LMER		Lockheed Martin Energy Research Corporation (ORNL)
LMES		Lockheed Martin Energy Systems, Inc. ("Energy Systems" is preferred)
LNG		Liquified Natural Gas
LODYC		Laboratoire d'Oceanographic Dynamique et de Climatologie
LOICZ		Land-Ocean Interactions in the Coastal Zone
		(IGBP)
LOICZ-SSC	LOICZ Scientific Steering Committee
long.		longitude
LOIS		Land Oceans Interactions Study
LONGLINES	Long Hydrographic Sections Programme (U.S.)
LORAN		Long-Range Area Navigation System
LORCS		League of the Red Cross and Red Crescent Societies
LOTREX		Land-Ocean Interactions in the Coastal Zone (IGBP)
LOTREX		Longitudinal Land-Surface Traverse Experiment
LOTUS		Long-Term Upper Ocean Study, Woods Hole, 1983
LOWESS		locally weighted least squares
LP		Low Pressure
LPDA		laser-phased Doppler anemometer
LPDM		Lagrangian particle dispersion model
LPG		Liquid Petroleum Gas
LPI		low-pressure impactor
LPM		liters per minute
LR		laser retroreflector
LRA		laser retroreflector array
LRP		Landscape Research Project (DOE)
LRPT		low-resolution picture transmission
LSC		Lake Survey Center (NOAA)
LSD		least significant difference
LSM		LAWS Simulation Model
LSN		long- and short-normal resistivity (geophysical logging)
LST		local solar time
LST		local standard time
LTER		Long-Term Ecological Research (program) (NSF)
LTM		linear tangent model
LTM		long-term monitoring
LTREB		Long-Term Research in Environmental Biology
LTRMP		Long-Term Resource Monitoring Program (U.S.
		Fish and Wildlife Service)
LTRRS		Long-Term Regional Research Site
LUCC		Land Use and Cover Change (IGBP and HDP)
LUCC-CPPC	LUCC Core Project Planning Committee
LUCIE		Study of circulation north and west of Australia (Leeuwin Current)
LV		Large Volume water samples (>100 liters)
LVS		Large Volume Sampling
LVS		low-volume sampler
LW		longwave
LWC		liquid water content
LWIR		long-wavelength (thermal) infrared
LWP		liquid water path
LWRM		longwave radiation model

M

m		meter
M-region	Maunder region
M&CD		Metals and Ceramics Division (<