The imagery here shows the output of a computer model that makes predictions of how the pH will change over time based on best estimates of likely CO2 emissions (RCP 8.5) used in the United Nations Intergovernmental Panel on Climate Change's AR5 assessment. The dataset starts in 1861 and runs through 2100.
This visualization, originally developed by NOAA Environmental Visualization Laboratory for display on NOAA's Science On a Sphere, is adapted here for use on the NASA hyperwall.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 18.104.22.168.0