MERRA-2 is the latest version of the data set for global atmospheric reanalysis in the satellite era produced by NASA's Global Modeling and Assimilation Office (GMAO) using Goddard Earth Observation System Model (GEOS) version 5.12.4. With the enhancement of meteorological assimilation, MERRA-2 has taken an important step towards the goal of GMAO Earth system reanalysis. MERRA-2 is the first long-term global reanalysis to assimilate space-based aerosol observations and represent their interactions with other physical processes in the climate system. This data set is a two-dimensional data collection with an average time of every hour in MERRA-2, covering the period from 1980 to 2022, with a spatial resolution of 0.5 ° * 0.625 °. This collection contains the surface diagnostic data of Southwest China, such as base flow flux, surface temperature, runoff, surface soil moisture, root zone soil moisture, surface water, root zone layer water and six layer soil temperature. The data field is time marked using the one hour central time starting from 00:30 UTC, for example: 00:30, 01:30,..., 23:30 UTC.
The surface diagnostic data is stored in the netCDF format. The file name is "MERRA2_SVv.tavg1_2d_lnd_Nx. yyyymmdd. SUB. nc". The number qualifiers S and Vv represent the production flow and version number, yyyy represents the year, mm represents the month, and dd represents the date.
Nasa, N. (2022). MERRA-2 Surface Diagnostic Dataset of 0.5 ° * 0.625 ° in Southwest China (1980-2022). Upper Yangtze River Scientific Data Center, DOI: 10.5067/RKPHT8KC1Y1T. (Download the reference：
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| East: 112.50 | West: 97.00 |
|---|---|
| South: 20.50 | North: 34.50 |
