The Science Keywords reflect the GCMD's last Science Keyword release. At this time, we are requesting that the following citation be used by those individuals and groups using the GCMD Keywords.

Olsen, L.M., G. Major, K. Shein, J. Scialdone, R. Vogel, S. Leicester, H. Weir, S. Ritz, T. Stevens, M. Meaux, C.Solomon, R. Bilodeau, M. Holland, T. Northcutt, R. A. Restrepo, 2007 .
NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 6.0.0.0.0

Why hasn't the new version of the GCMD keywords been released?

We are planning to release the new vocabularies to the users within the coming months.   We did not include in our estimates the depth and breadth of the impact the changes and additions on those who currently maintain their metadata using the GCMD keywords outside of the directory itself.   Therefore, it appeared to be prudent to build a well-structured keyword server to handle the mappings from the current version of the keywords to the new and extended sets.   The keyword server is targeted to save valuable time in translations for everyone involved and is being built now.

If you would like to receive the most current keywords in our GCMD database, please contact GCMD Support.