DOI: 10.5194/hess-18-3937-2014
Scopus记录号: 2-s2.0-84908053312
论文题名: Variability of moisture recycling using a precipitationshed framework
作者: Keys P ; W ; , Barnes E ; A ; , Van Der Ent R ; J ; , Gordon L ; J
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 10 起始页码: 3937
结束页码: 3950
语种: 英语
Scopus关键词: evaporation
; hydrological cycle
; land use change
; moisture content
; nature-society relations
; precipitation (climatology)
; Argentina
; Buenos Aires [Argentina]
; China
; La Plata
; Sahel [Sub-Saharan Africa]
英文摘要: Recent research has revealed that upwind land-use changes can significantly influence downwind precipitation. The precipitationshed (the upwind ocean and land surface that contributes evaporation to a specific location's precipitation) may provide a boundary for coordination and governance of these upwind-downwind water linkages. We aim to quantify the variability of the precipitationshed boundary to determine whether there are persistent and significant sources of evaporation for a given region's precipitation. We identify the precipitationsheds for three regions (i.e., western Sahel, northern China, and La Plata) by tracking atmospheric moisture with a numerical water transport model (Water Accounting Model-2layers, or WAM-2layers) using gridded fields from both the ERA-Interim (European Reanalysis Interim) and MERRA (Modern-Era Retrospective Analysis for Research and Applications) reanalyses. Precipitationshed variability is examined first by diagnosing the persistence of the evaporation contribution and second with an analysis of the spatial variability of the evaporation contribution. The analysis leads to three key conclusions: (1) a core precipitationshed exists; (2) most of the variance in the precipitationshed is explained by a pulsing of more or less evaporation from the core precipitationshed; and (3) the reanalysis data sets agree reasonably well, although the degree of agreement is regionally dependent. Given that much of the growing-season evaporation arises from within a core precipitationshed that is largely persistent in time, we conclude that the precipitationshed can potentially provide a useful boundary for governing land-use change on downwind precipitation. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78114
Appears in Collections: 气候变化事实与影响
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作者单位: Stockholm Resilience Centre, Stockholm University, Stockholm, Sweden; Department of Atmospheric Science, Colorado State University, Fort Collins, United States; Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands
Recommended Citation:
Keys P,W,, Barnes E,et al. Variability of moisture recycling using a precipitationshed framework[J]. Hydrology and Earth System Sciences,2014-01-01,18(10)