DOI: 10.1175/JCLI-D-16-0570.1
Scopus记录号: 2-s2.0-85014041229
论文题名: Land Surface Precipitation in MERRA-2
作者: Reichle R.H. ; Liu Q. ; Koster R.D. ; Draper C.S. ; Mahanama S.P.P. ; Partyka G.S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 5 起始页码: 1643
结束页码: 1664
语种: 英语
Scopus关键词: Atmospheric humidity
; Atmospheric temperature
; Gages
; Meteorology
; Initial conditions
; Near surface air temperature
; Precipitation data
; Precipitation products
; Production streams
; Research and application
; Retrospective analysis
; Self-consistent surface
; Surface measurement
; atmospheric modeling
; comparative study
; error correction
; instrumentation
; land surface
; precipitation (climatology)
; precipitation intensity
; raingauge
; satellite data
; TRMM
; Africa
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 landonly 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 theMERRA-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 eachMERRA-2 stream (1980, 1992, 2001, and 2011). © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49740
Appears in Collections: 气候变化事实与影响
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作者单位: Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, Science Systems and Applications, Inc., Lanham, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, and Goddard Earth, Sciences Technology and Research, Universities Space Research Association, Columbia, MD, United States
Recommended Citation:
Reichle R.H.,Liu Q.,Koster R.D.,et al. Land Surface Precipitation in MERRA-2[J]. Journal of Climate,2017-01-01,30(5)