DOI: 10.1175/JCLI-D-16-0293.1
Scopus记录号: 2-s2.0-84987771307
论文题名: A mathematical framework for analysis of water tracers. Part II: Understanding large-scale perturbations in the hydrological cycle due to CO2 doubling
作者: Singh H.K.A. ; Bitz C.M. ; Donohoe A. ; Nusbaumer J. ; Noone D.C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 18 起始页码: 6765
结束页码: 6782
语种: 英语
Scopus关键词: Budget control
; Carbon dioxide
; Climate change
; Climate models
; Evaporation
; Lagrange multipliers
; Precipitation (chemical)
; Precipitation (meteorology)
; Radioactive tracers
; Global climate model
; Hydrologic cycles
; Lagrangian circulation/transport
; Large-scale perturbations
; Mathematical frameworks
; Moisture convergence
; Moisture/moisture budgets
; Precipitation change
; Moisture
英文摘要: The aerial hydrological cycle response to CO2 doubling from a Lagrangian, rather than Eulerian, perspective is evaluated using information from numerical water tracers implemented in a global climate model. While increased surface evaporation (both local and remote) increases precipitation globally, changes in transport are necessary to create a spatial pattern where precipitation decreases in the subtropics and increases substantially at the equator. Overall, changes in the convergence of remotely evaporated moisture are more important to the overall precipitation change than changes in the amount of locally evaporated moisture that precipitates in situ. It is found that CO2 doubling increases the fraction of locally evaporated moisture that is exported, enhances moisture exchange between ocean basins, and shifts moisture convergence within a given basin toward greater distances between moisture source (evaporation) and sink (precipitation) regions. These changes can be understood in terms of the increased residence time of water in the atmosphere with CO2 doubling, which corresponds to an increase in the advective length scale of moisture transport. As a result, the distance between where moisture evaporates and where it precipitates increases. Analyses of several heuristic models further support this finding. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50323
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Department of Atmospheric and Oceanic Sciences, Cooperative Institute for Research in Environmental Science, University of Colorado Boulder, Boulder, CO, United States; Department of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Singh H.K.A.,Bitz C.M.,Donohoe A.,et al. A mathematical framework for analysis of water tracers. Part II: Understanding large-scale perturbations in the hydrological cycle due to CO2 doubling[J]. Journal of Climate,2016-01-01,29(18)