Video slate image reads, "TRMM: Covers El Niño/La Niña Event Over the Pacific Using Monthly Average Rainfall Measurements (January 1998 - October 2000) Monthly moving average is a 30 day moving average. Red indicates areas of high rainfall. Blue indicates areas of low rainfall."
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