DOI: 10.1175/JCLI-D-13-00384.1
Scopus记录号: 2-s2.0-84905919616
论文题名: Consistency of estimated global water cycle variations over the satellite era
作者: Robertson F.R. ; Bosilovich M.G. ; Roberts J.B. ; Reichle R.H. ; Adler R. ; Ricciardulli L. ; Berg W. ; Huffman G.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 16 起始页码: 6135
结束页码: 6154
语种: 英语
Scopus关键词: Atmospheric humidity
; Climatology
; Evapotranspiration
; Precipitation (meteorology)
; Decadal climate variability
; Decadal variability
; Eastern tropical pacific
; Global water cycle
; Interannual variation
; Land surface models
; Moisture flux convergences
; Sea surface temperature (SST)
; Oceanography
; annual variation
; atmospheric moisture
; climate variation
; decadal variation
; microwave imagery
; precipitation (climatology)
; relative humidity
; remote sensing
; satellite data
; sea surface temperature
; trend analysis
; wind velocity
英文摘要: Motivated by the question of whether recent interannual to decadal climate variability and a possible "climate shift"may have affected the global water balance, we examine precipitation minus evaporation (P - E) variability integrated over the global oceans and global land for the period 1979-2010 from three points of view-remotely sensed retrievals and syntheses over the oceans, reanalysis vertically integrated moisture flux convergence (VMFC) over land, and land surface models (LSMs) forced with observations-based precipitation, radiation, and near-surface meteorology. Over land, reanalysis VMFC and P 2evapotranspiration (ET) from observationally forced LSMs agree on interannual variations (e.g., El Niño/La Niña events); however, reanalyses exhibit upward VMFC trends 3-4 times larger than P - ET trends of the LSMs. Experiments with other reanalyses using reduced observations show that upward VMFC trends in the full reanalyses are due largely to observing system changes interacting with assimilation model physics. The much smaller P - ET trend in the LSMs appears due to changes in frequency and amplitude of warm events after the 1997/98 El Niño, a result consistent with coolness in the eastern tropical Pacific sea surface temperature (SST) after that date. When integrated over the global oceans, E and especially P variations show consistent signals of El Niño/La Niña events. However, at scales longer than interannual there is considerable uncertainty especially in E. This results from differences among datasets in near-surface atmospheric specific humidity and wind speed used in bulk aerodynamic retrievals. The P variations, all relying substantially on passive microwave retrievals over ocean, also have uncertainties in decadal variability, but to a smaller degree. © 2014 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/51266
Appears in Collections: 气候变化事实与影响
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作者单位: Earth Science Office, NASA Marshall Space Flight Center, Huntsville, AL, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, MD, United States; Remote Sensing Systems, Santa Rosa, CA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Mesoscale Atmospheric Processes Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Recommended Citation:
Robertson F.R.,Bosilovich M.G.,Roberts J.B.,et al. Consistency of estimated global water cycle variations over the satellite era[J]. Journal of Climate,2014-01-01,27(16)