Global Ocean Surface Water Partial Pressure of CO2 Database (LDEO Database Version 2019): Measurements Performed During 1957-2019 (NCEI Accession 0160492)

R/V Nathaniel B. Palmer’s system has been operating since 1995, R/V Laurence M. Gould’s system since 2001, USCGC Healy since 2011, R/V M. Langseth since 2010 (terminated in 2018), and R/V Sikuliaq since 2015. Our contribution to this database through many years of 3.31 million records is primarily for the polar and sub-polar seas. These underway data have been quality controlled and corrected for the time lag and temperature differences between the water intake and pCO2 measurements.

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 uatm on the average. The names and institutional affiliations of the contributors are listed in Table 1.

The documentations for the previous versions (V1.0, V2007, V2008, V2009, V2010, V2011, V2012, V2013, V2014, V2015, V2016, V2017, and V2018) of our database are available at NCEI via Ocean Carbon data System (OCADS) LDEO Database web page: nodc.noaa.gov/archive/arc0105/0160492/ The global pCO2 data set is available free of charge as a numeric data package (NDP) from the OCADS: nodc.noaa.gov/ocads/oceans/LDEO_Underway_Database/.

The NDP consists of the oceanographic data files and this printed documentation, which describes the procedures and methods used to obtain the data.