MERRA is a NASA reanalysis for the satellite era using a major new
version (circa 2008) of the Goddard Earth Observing System Data Assimilation System Version 5 (GEOS - 5) produced by the NASA GSFC Global Modeling and Assimilation Office
version (circa 2008) of the Goddard Earth
Observing System Data Assimilation
System Version 5 (GEOS - 5) produced by the NASA GSFC Global Modeling and Assimilation Office
Version 5 (GEOS - 5) produced by the NASA GSFC Global Modeling and Assimilation Office (GMAO).