The study of meteorology presents significant challenges to scientists. One of the most challenging aspects is the inherent complexity of weather coupled with its high rate of change. In the case of clouds, scientists seek new insights into how they form, behave, and interact with the Earth's atmosphere. Engineers designed Cloudsat and Calipso to deliver the data needed by scientists to provide new understanding of how clouds, water vapor, ice particles, and aerosols affect the weather.
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