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MERRA-2 M2T1NXSLV provides hourly time-averaged, two-dimensional meteorological diagnostics at standard vertical levels. The dataset is produced by NASA's Global Modeling and Assimilation Office using the GEOS model and covers the period from 1980 to the present. Data includes parameters like air temperature at 2 meters, wind components at multiple levels, sea level pressure, and total precipitable water vapor.
Users must check the 'Records of MERRA-2 Data Reprocessing and Service Changes' for file versioning. Data filenames differ between original and reprocessed versions. Access requires registration with NASA Earthdata.