This visualization was created to be one of the final shots of a video celebrating the 50th anniversary of Earth Day. The camera starts under water off the coast of the Eastern United States showing layers of ocean currents from a computational model called ECCO-2. The camera slowly pulls back revealing the Gulf Stream, one of the most powerful ocean currents on Earth. The camera continues to pull back revealing NASA's Earth observing fleet.
The ocean currents are colored by depth from white (5 meters below the surface) down to dark blue (5906 meters below the surface). The color bar is non-linear; there are more levels near the surface than deeper.
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 22.214.171.124.0