NASA computer models help scientists identify an uptick in emissions of CFC-11, an ozone-depleting gas, in the atmosphere. NASA and NOAA work together, as part of a long-running research partnership, monitoring efforts on stratospheric ozone. This research continues their partnership, joining scientists from MIT and the University of Bristol.
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 126.96.36.199.0