Index of /ftp/oceans/LDEO_Database/Version_2013
Database should be cited as:
Takahashi, T., S.C. Sutherland and A. Kozyr. 2014. Global Ocean Surface Water Partial Pressure of CO2 Database:
Measurements Performed During 1957-2013 (Version 2013). ORNL/CDIAC-160, NDP-088(V2013). Carbon Dioxide Information
Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, doi: 10.3334/CDIAC/OTG.NDP088(V2013).
More than 9.0 million measurements of surface water pCO2 made over the global oceans during 1957-2013 have been processed to
make a uniform data file in this Version 2013. 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. However, as discussed in Section 5,
errors up to about 5 μatm are possible when underway measurements were made across high SST gradient areas due to time lag of sample
water transit from the intake to the equilibrator. 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, 2011, and V2012) of LDEO 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 2013, and includes the data collected through 31 December 2013. In this update, a total of about
2,270,000 pCO2 measurements made during 64 new cruise/ship files (including 170,770 new measurements made by the LDEO group) are added to the
previous version 2012. A substantial number of files/data points from the participants of the NOAA sponsored Vessel of Opportunity (VOS) program
were added. Several additional vessels as well as additional files from previously included vessels contributed significant number of the observations.