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LDEO Database 2009 is now available from CDIAC

LDEO Database Version 2009 is now available from CDIAC:
http://cdiac.ornl.gov/oceans/LDEO_Underway_Database/

Takahashi, T., S.C. Sutherland, and A. Kozyr. 2010. Global Ocean Surface Water
Partial Pressure of CO2 Database: Measurements Performed During 1968-2009
(Version 2009). ORNL/CDIAC-152, NDP-088(V2009). Carbon Dioxide Information
Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak
Ridge, Tennessee, doi: 10.3334/CDIAC/otg.ndp088(V2009).

Approximately 4.75 million measurements of surface water partial pressure of
CO2 obtained over the global oceans during 1968-2009 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 2009,
meaning that data collected through 31 December 2009 has been
included. It is our intention to update this database annually. There are 42
new cruise/ship files in this update . In addition, some
editing has been performed on existing files so this should be considered
a "V2009" file.  Also we have 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.

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.

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Alex Kozyr
Carbon Dioxide Information Analysis Center
Environmental Sciences Division
Oak Ridge National Laboratory
U.S. Department of Energy
Building 1509, Mail Stop 6335
Oak Ridge, TN 37831-6335 U.S.A.

tel  1-865-576-8449
fax  1-865-574-2232

Electronic address:  kozyra@ornl.gov
Ocean CO2 WWW Page: http://cdiac.ornl.gov/oceans/home.html

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