Index of /ftp/oceans/LDEO_Database/Version_2012
Database should be cited as:
Takahashi, T., S.C. Sutherland, and A. Kozyr. 2013. Global Ocean Surface Water Partial Pressure of CO2 Database:
Measurements Performed During 1957-2012 (Version 2012). ORNL/CDIAC-160, NDP-088(V2012). Carbon Dioxide Information
Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, doi: 10.3334/CDIAC/OTG.NDP088(V2012).
Approximately 6.7 million measurements of surface water pCO2 made over the global oceans during 1957-2012 have been processed to make a
uniform data file. Measurements made in open oceans as well as in coastal waters are included. The data assembled include only those measured
using equilibrator-CO2 analyzer systems, and have been quality-controlled based upon the stability of the system performance, the reliability
of calibrations for CO2 analysis and the internal consistency of data. In order to allow re-examination of the data in the future, a number
of measured parameters relevant to pCO2 in seawater are listed. The overall uncertainty for the pCO2 values listed is estimated to be ± 2.5 μatm
on the average. The names and institutional affiliations of the contributors are listed in Table 1. A column is added for reporting the partial
pressure of CO2 in seawater in units of Pascals. The documentations for the previous versions (V1.0, V2007, V2008, V2009, V2010 and V2011) of
our database are available at CDIAC http://cdiac.ornl.gov/ftp/oceans/LDEO_Database/
The global pCO2 data set is available free of charge as a numeric data package (NDP) from the Carbon Dioxide Information Analysis Center (CDIAC).
The NDP consists of the oceanographic data files and this printed documentation, which describes the procedures and methods used to obtain the data.
This version is referred to as Version 2012, and includes the data collected through 31 December 2012. In this update, about 277,000 pCO2
measurements made during 29 new cruise/ship files are added to the previous version 2011. The new additions include the new data from our field
operations aboard L.M. Gould, N.B. Palmer, Marcus G. Langseth, US Coast Guard Cutter Healy These data files from Gould, Palmer, Langseth, and
Healy are also posted on our LDEO website: http://www.ldeo.columbia.edu/res/pi/CO2/. In addition, several files from the Volunteer Observation
Ships (VOS) program, M/V Explorer of the Seas, and 3 NOAA ships., which have recently been released for years 2010 – 2012, are combined into the
master file of CDIAC http://cdiac.ornl.gov/oceans/.