In commemoration of the end of the International Polar Year, Tom Wagner, NASA Cryosphere Program Scientist, appeared on television stations around the country on April 6, 2009. This video highlights his answers to questions about the IPY, climate change, and new data on the extent and thickness of sea ice covering the Arctic Ocean.
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