DOI: 10.1175/JCLI-D-16-0338.1
Scopus记录号: 2-s2.0-85012240094
论文题名: Atmospheric water balance and variability in the MERRA-2 reanalysis
作者: Bosilovich M.G. ; Robertson F.R. ; Takacs L. ; Molod A. ; Mocko D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 4 起始页码: 1177
结束页码: 1196
语种: 英语
Scopus关键词: Atmospheric humidity
; Budget control
; Climate change
; Climate models
; Earth (planet)
; Evaporation
; NASA
; Oceanography
; Precipitation (meteorology)
; Budgets
; Climate variability
; General circulation model
; Hydrologic cycles
; Reanalysis
; Water vapor
; atmospheric general circulation model
; atmospheric moisture
; climate variation
; energy budget
; evaporation
; humidity
; hydrological cycle
; satellite data
; water budget
; water vapor
英文摘要: Closing and balancing Earth's global water cycle remains a challenge for the climate community. Observations are limited in duration, global coverage, and frequency, and not all water cycle terms are adequately observed. Reanalyses aim to fill the gaps through the assimilation of as many atmospheric water vapor observations as possible. Former generations of reanalyses have demonstrated a number of systematic problems that have limited their use in climate studies, especially regarding low-frequency trends. This study characterizes the NASA Modern-Era Retrospective Analysis for Research and Applications version 2 (MERRA-2) water cycle relative to contemporary reanalyses and observations. MERRA-2 includes measures intended to minimize the spurious global variations related to inhomogeneity in the observational record. The global balance and cycling of water from ocean to land is presented, with special attention given to the water vapor analysis increment and the effects of the changing observing system. While some systematic regional biases can be identified, MERRA-2 produces temporally consistent time series of total column water and transport of water from ocean to land. However, the interannual variability of ocean evaporation is affected by the changing surface-wind-observing system, and precipitation variability is closely related to the evaporation. The surface energy budget is also strongly influenced by the interannual variability of the ocean evaporation. Furthermore, evaluating the relationship of temperature and water vapor indicates that the variations of water vapor with temperature are weaker in satellite data reanalyses, not just MERRA-2, than determined by observations, atmospheric models, or reanalyses without water vapor assimilation. © 2017 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49802
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; NASA Marshall Space Flight Center, Huntsville, AL, United States; Science Systems and Applications, Inc. (SSAI), Lanham, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, United States; Science Applications International Corporation (SAIC), NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Bosilovich M.G.,Robertson F.R.,Takacs L.,et al. Atmospheric water balance and variability in the MERRA-2 reanalysis[J]. Journal of Climate,2017-01-01,30(4)