ASTER images are being used in an ambitious international project to map the extent of the world's glaciers and the rate at which they are changing. High-resolution ASTER images make it possible to distinguish and track small features on glacier surfaces. Images presented by Rick Wessels from Arizona State University showing details of snow and ice of glaciers are contributing to the Global Land Ice Measurements from Space (GLIMS) project, a global consortium led by the U.S. Geological Survey.
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 220.127.116.11.0