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Journal for accession number: 0059946
Created on:                    2009-12-07 17:35:34 UTC
By:                            Hernan Garcia,OC5,SSMC3 4230,7133291 x184

Source: Underway PCO2 data received at NODC on December 07, 2009 by Hernan Garcia, data 
downloaded from http://cdiac.ornl.gov/ftp/oceans/LDEO_Database/

NODC cannot guarantee that any data made available by the listed web service will be the same as 
those contained in this data accession or that the web service will be available after the date listed above.

Database should be cited as:

Takahashi, T., S.C. Sutherland, and A. Kozyr. 2009. Global Ocean Surface Water Partial Pressure of CO2 Database: 
Measurements Performed During 1968-2008 (Version 2008). ORNL/CDIAC-152, NDP-088r. Carbon Dioxide Information Analysis 
Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, doi: 10.3334/CDIAC/otg.ndp088r.

Approximately 4.5 million measurements of surface water partial pressure of CO2 obtained over the global oceans during 
1968-2008 are listed in the Lamont-Doherty Earth Observatory (LDEO) database, which includes open ocean and coastal water 
measurements. The data assembled include only those measured by equilibrator-CO2 analyzer systems and have been quality-controlled 
based on the stability of the system performance, the reliability of calibrations for CO2 analysis, and the internal consistency 
of data. To allow re-examination of the data in the future, a number of measured parameters relevant to pCO2 measurements are 
listed. The overall uncertainty for the pCO2 values listed is estimated to be +/- 2.5 uatm on the average.

For simplicity and for ease of reference, this version is referred to as 2008, meaning that data collected through 31 December 
2008 has been included. CDIAC intends to update this database annually. There are 26 new cruise/ship files in this update. 
In addition, some editing has been performed on existing files so this should be considered a "V2008" file.  Also CDIAC has added 
a column reporting the partial pressure of CO2 in seawater in units of Pascals.

The data presented in this database include the analyses of partial pressure of CO2 (pCO2), sea surface temperature (SST), sea 
surface salinity (SSS), pressure of the equilibration, and barometric pressure in the outside air from the ship’s observation 
system. 

Found in 0059946/0-data directory

LDEO_Database_Metadata_V2008.xls
LDEO_Database_Metadata_V2008.csv (a conversion of the LDEO_Database_Metadata_V2008.xls file into comma separated value file)
LDEO_Database_V2008.txt.tar.gz - data in compress format
LDEO_database.jpg - data distributioin plot
NDP-088r.pdf - Complete metadata description