Land Surface Precipitation in MERRA-2 | Zendy

Rolf H. Reichle | Zendy; Qing Liu | Zendy; Randal D. Koster | Zendy; Clara Draper | Zendy; Sarith Mahanama | Zendy; Gary Partyka | Zendy

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Land Surface Precipitation in MERRA-2

Author(s) -

Rolf H. Reichle,

Qing Liu,

Randal D. Koster,

Clara Draper,

Sarith Mahanama,

Gary Partyka

Publication year - 2016

Publication title -

journal of climate

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.315

H-Index - 287

eISSN - 1520-0442

pISSN - 0894-8755

DOI - 10.1175/jcli-d-16-0570.1

Subject(s) - precipitation , environmental science , climatology , forcing (mathematics) , latitude , atmospheric sciences , atmosphere (unit) , meteorology , geology , geography , geodesy

The Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), features several major advances from the original MERRA reanalysis, including the use, outside of high latitudes, of observations-based precipitation data products to correct the precipitation falling on the land surface in the MERRA-2 system. The method for merging the observed precipitation into MERRA-2 has been refined from that of the (land-only) MERRA-Land reanalysis. This paper describes the method and evaluates the MERRA-2 land surface precipitation. Compared to monthly GPCPv2.2 observations, the corrected MERRA-2 precipitation (M2CORR) is better than the precipitation generated by the atmospheric models within the cycling MERRA-2 and MERRA systems. M2CORR is also better than MERRA-Land precipitation over Africa because in MERRA-2 a merged satellite–gauge precipitation product is used instead of the gauge-only data used for MERRA-Land. Compared to 3-hourly TRMM observations, the M2CORR diurnal cycle ha...

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