DOI: 10.1175/JCLI-D-11-00116.1
Scopus记录号: 2-s2.0-84856971010
论文题名: Extratropical influence on ITCZ shifts in slab ocean simulations of global warming
作者: Frierson D.M.W. ; Hwang Y.-T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 2 起始页码: 720
结束页码: 733
语种: 英语
Scopus关键词: Atmospheric circulation
; Carbon dioxide concentrations
; Data support
; Extratropical
; Extratropics
; Hadley circulation
; Intertropical convergence zone
; Large shifts
; Nonlocal
; Paleoclimates
; Slab ocean
; Slab ocean models
; Transport
; Water vapor contents
; Carbon dioxide
; Climate models
; Climatology
; Computer simulation
; Feedback
; Global warming
; Tropics
; atmospheric transport
; carbon dioxide
; climate modeling
; computer simulation
; concentration (composition)
; extratropical environment
; global warming
; Hadley cell
; intertropical convergence zone
; water content
; water vapor
英文摘要: Recent studies with climate models have demonstrated the power of extratropical forcing in causing the intertropical convergence zone (ITCZ) to shift northward or southward, and paleoclimate data support the notion that there have been large shifts in the ITCZ over time. It is shown that similar notions apply to slab ocean simulations of global warming. Nine slab ocean model simulations from different modeling centers show a wide range of ITCZ shifts in response to doubling carbon dioxide concentrations, which are experienced in a rather zonally symmetric way in the tropics. Using an attribution strategy based on fundamental energetic constraints, it is shown that responses of clouds and ice in the extratropics explain much of the range of ITCZ responses. There are also some positive feedbacks within the tropics due to increasing water vapor content and high clouds in the new ITCZ location, which amplify the changes driven from the extratropics. This study shows the clear importance of simulating extratropical climate responses with fidelity, because in addition to their local importance, the impacts of these climate responses have a large nonlocal impact on rainfall in the tropics. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52584
Appears in Collections: 气候变化事实与影响
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作者单位: University of Washington, Seattle, WA, United States
Recommended Citation:
Frierson D.M.W.,Hwang Y.-T.. Extratropical influence on ITCZ shifts in slab ocean simulations of global warming[J]. Journal of Climate,2012-01-01,25(2)