The MERRA is a NASA reanalysis for the satellite era using a major new version (V5) of the Goddard Earth Observing System (GEOS) Data Assimilation System (DAS). The MERRA focuses on historical analyses of the hydrological cycle on a broad range of weather and climate time scales.
This MERRA Instance of Giovanni focuses on visualizing and analyzing the MERRA 3-hourly 3D data from the MERRA HISTORY COLLECTIONS. All data used here are at MERRA reduced resolution of 1.25 longitude by 1.25 latitude degrees, with 42 vertical pressure levels.
Currently this instance contains only part of the MERRA 3-hourly 3D variables. The rest of them will be added in the future releases.