Global Estimate of Surface Ocean pH, Omega of Calcite, and Omega of Aragonite

This page contains data and maps created for our estimate of global surface ocean pH. It is the source for the report "Final Report Submitted to the National Science Foundation, 08 January 2013, Climatological Mean Distribution of pH and Carbor Ion Concentration in Global Ocean Surface Waters in the Unified pH Scale and Mean Rate of their Changes in Selected Areas."

There are two databases. One is the individual observations, mostly from the GLODAP project where pCO2 observations from the LDEO database have been merged into the GLODAP file. This is the "observed" database. We also re-ran our interpolation scheme to create an updated pCO2 gridded database, using 2005 as the target year. Those data and the pH, CO3=, Hydrogen Ion Concentration, etc. are contained in the "calculated" data base.

The database of 21,084 monthly, gridded data elements including pCO2, calculated TCO2, Calculated Potential and Total Alkalinity, calculated pH, and calculated Omega of Calcite and Aragonite is here.