Data Listing

This NDP consists of two files: the file called "LDEO_database.txt" contains all the numerical data, and the file "heading.txt" contains information on the data source, credit, institution, etc. The data elements in "LDEO_Database.txt" and their units are listed in Table 2; and those in "Metadata.xls" are explained in Table 3. Detailed cruise documentation (such as names of ship and ports and dates for departure and arrival) may be obtained directly from CDIAC or the respective PI's.

Table 2. Data elements listed in the master data file "LDEO_Database.txt"
FILENAME* Internal LDEO File Name
STN* Station number assigned in the LDEO File
LAT Latitude in decimal degrees (North is positive)
LON Longitude in decimal degrees (East is positive)
MONTH/DAY/YEAR Date
JDATE Julian Date in decimal notation. Convention is 0001 UTC 1 Jan = 1.0
VCO2_SW** Mole fraction concentration of CO2 (ppm) in dried air
PCO2_TEQ Partial Pressure of CO2 in seawater (microatmospheres) at the temperature in the TEMP_PCO2 column
TEMP_PCO2 Temperature at which pCO2 was measured in °C
SST Sea Surface Temperature in °C
SSS Sea Surface Salinity
PCO2_SST Partial Pressure of CO2 in seawater (in units of microatmospheres) at the temperature in the SST column
PCO2_SSTPA Partial Pressure of CO2 in seawater (in units of microatmospheres) at the temperature in the SST column
PCO2_TEQ Partial Pressure of CO2 in seawater (in units of Pascals) at the temperature in the TEMP column
EQ_PBARO Pressure in the equilibration vessel in units of millibars
SHIPPBARO Barometric pressure in the outside air from the ship's observation system in units of millibars

*Cross reference fields to the internal LDEO file name in case problems are discovered
**Missing data have the value -999.9

Table 3. Data elements listed in the metadata file "Metadata.xls"
FILENAME Internal LDEO File Name
DIRNAME Directory Name for the Internal LDEO File Name
LEG Leg Number. This is an arbitrary designation in many files because of our limit of four characters for a station number. For surface underway files that normally have many more than 9,999 observations we have broken the file into "legs".
SHIP The name of the ship or other platform used
OBSERVER A notation of the person making the observation or responsible for running the collection system
DEPARTPORT Port of Departure
DEPARTDATE Date of Departure
ARRIVEPORT Port of Arrival
ARRIVEDATE Date of Arrival
CRUISENAME A notation to identify the general name of the cruise
COMMENT* Air data source and general information

*Additional information may be available for a particular file if needed.


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