DOI: 10.1175/JCLI-D-16-0649.1
Scopus记录号: 2-s2.0-85020028622
论文题名: Land-ocean shifts in tropical precipitation linked to surface temperature and humidity change
作者: Lambert F.H. ; Ferraro A.J. ; Chadwick R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 12 起始页码: 4527
结束页码: 4545
语种: 英语
Scopus关键词: Atmospheric humidity
; Atmospheric temperature
; Classification (of information)
; Climate models
; Precipitation (chemical)
; Surface properties
; Tropics
; Absolute values
; General circulation model
; Hydrologic cycles
; Precipitation change
; Specific humidity
; Surface temperatures
; Tropical precipitation
; Weak temperature gradient approximations
; Climate change
; climate change
; climate classification
; climate feedback
; general circulation model
; humidity
; hydrological cycle
; precipitation (climatology)
; surface temperature
; tropical meteorology
; weather forecasting
; South America
英文摘要: A compositing scheme that predicts changes in tropical precipitation under climate change from changes in near-surface relative humidity (RH) and temperature is presented. As shown by earlier work, regions of high tropical precipitation in general circulation models (GCMs) are associated with high near-surface RH and temperature. Under climate change, it is found that high precipitation continues to be associated with the highest surface RH and temperatures in most CMIP5 GCMs, meaning that it is the "rank" of a given GCM grid box with respect to others that determines how much precipitation falls rather than the absolute value of surface temperature or RH change, consistent with the weak temperature gradient approximation. Further, it is demonstrated that the majority of CMIP5 GCMs are close to a threshold near which reductions in land RH produce large reductions in the RH ranking of some land regions, causing reductions in precipitation over land, particularly South America, and compensating increases over ocean. Recent work on predicting future changes in specific humidity allows the prediction of the qualitative sense of precipitation change in some GCMs when land surface humidity changes are unknown. However, the magnitudes of predicted changes are too small. Further study, perhaps into the role of radiative and land-atmosphere feedbacks, is necessary. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49659
Appears in Collections: 气候变化事实与影响
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作者单位: College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom
Recommended Citation:
Lambert F.H.,Ferraro A.J.,Chadwick R.. Land-ocean shifts in tropical precipitation linked to surface temperature and humidity change[J]. Journal of Climate,2017-01-01,30(12)