DOI: 10.1002/grl.50474
论文题名: Mechanism of tropical low-cloud response to surface warming using weather and climate simulations
作者: Demoto S. ; Watanabe M. ; Kamae Y.
刊名: Geophysical Research Letters
ISSN: 0094-9065
EISSN: 1944-8796
出版年: 2013
卷: 40, 期: 10 起始页码: 2427
结束页码: 2432
语种: 英语
英文关键词: boundary-layer
; climate models
; low-cloud feedback
; Transpose-AMIP
; Walker circulation
Scopus关键词: Atmospheric model intercomparison projects
; Climate simulation
; General circulation model
; Marine boundary layers
; Sea surface temperature (SST)
; Surface wind speed
; Transpose-AMIP
; Walker circulation
; Atmospheric temperature
; Boundary layers
; Climate models
; Global warming
; Subsidence
; Tropics
; boundary layer
; cloud
; experimental design
; global warming
; numerical model
; sea surface
; sea surface temperature
; timescale
; tropical environment
; turbulent mixing
英文摘要: To understand mechanisms of shortwave cloud-radiative feedback to global warming in a general circulation model (GCM), we analyzed the response of tropical clouds to uniform increase of sea surface temperature in an atmospheric GCM with two different experimental designs: a single Atmospheric Model Intercomparison Project (AMIP) run for 30 years and a series of 10 day weather hindcasts following the Transpose AMIP II (TAMIP). Given the fast time scale of cloud processes, the hindcast ensemble can capture initial transient responses toward equilibrium obtained in the AMIP experiment, which shows a reduction of low clouds over tropical subsidence regions. The reduction of clouds occurs in the first 10 days in TAMIP when the marine boundary layer (MBL) is destabilized because of contrast between fast and slow warming in the MBL and aloft. Enhanced evaporation from the sea surface that should moisten the MBL through turbulent mixing is suppressed by a reduced surface wind speed associated with a slowdown of the Walker circulation. The sign of the low-cloud change over the subsidence regime is thus determined roughly by competition between convective drying and turbulent moistening of the MBL. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879936850&doi=10.1002%2fgrl.50474&partnerID=40&md5=c5b52c54497c13a883b6ec3459833b27
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6329
Appears in Collections: 气候减缓与适应
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作者单位: Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba 277-8568, Japan
Recommended Citation:
Demoto S.,Watanabe M.,Kamae Y.. Mechanism of tropical low-cloud response to surface warming using weather and climate simulations[J]. Geophysical Research Letters,2013-01-01,40(10).