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DOI10.1175/JCLI-D-16-0570.1
Land Surface Precipitation in MERRA-2
Reichle, Rolf H.1; Liu, Q.1,2; Koster, Randal D.1; Draper, Clara S.1,3; Mahanama, Sarith P. P.1,2; Partyka, Gary S.1,2
2017-03-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2017
卷号30期号:5
文章类型Article
语种英语
国家USA
英文摘要

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 has better amplitude but less realistic phasing than MERRA-2 model-generated precipitation. Because correcting the precipitation within the coupled atmosphere-land modeling system allows the MERRA-2 near-surface air temperature and humidity to respond to the improved precipitation forcing, MERRA-2 provides more self-consistent surface meteorological data than were available from MERRA-Land, which is important for applications such as land-only modeling studies. Where precipitation observations of sufficient quality are available for use in the reanalysis, the corrections facilitate the seamless spinup of the land surface initial conditions across the MERRA-2 production streams. At high latitudes, however, the lack of reliable precipitation observations results in undesirable land spinup effects that impact mostly the first published year of each MERRA-2 stream (1980, 1992, 2001, and 2011).


领域气候变化
收录类别SCI-E
WOS记录号WOS:000395539100006
WOS关键词GLOBAL PRECIPITATION ; EAST-ASIA ; MODEL ; VARIABILITY ; REANALYSES ; SCALES ; CYCLE ; SIMULATION ; SYSTEM ; TRMM
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/20655
专题气候变化
作者单位1.NASA, Global Modeling & Assimilat Off, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA;
2.Sci Syst & Applicat Inc, Lanham, MD USA;
3.Univ Space Res Assoc, Goddard Earth Sci Technol & Res, Columbia, MD USA
推荐引用方式
GB/T 7714
Reichle, Rolf H.,Liu, Q.,Koster, Randal D.,et al. Land Surface Precipitation in MERRA-2[J]. JOURNAL OF CLIMATE,2017,30(5).
APA Reichle, Rolf H.,Liu, Q.,Koster, Randal D.,Draper, Clara S.,Mahanama, Sarith P. P.,&Partyka, Gary S..(2017).Land Surface Precipitation in MERRA-2.JOURNAL OF CLIMATE,30(5).
MLA Reichle, Rolf H.,et al."Land Surface Precipitation in MERRA-2".JOURNAL OF CLIMATE 30.5(2017).
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