DOI: 10.1175/JCLI-D-16-0502.1
Scopus记录号: 2-s2.0-85018966923
论文题名: Tropical precipitation and cross-equatorial ocean heat transport during the mid-Holocene
作者: Liu X. ; Battisti D.S. ; Donohoe A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 10 起始页码: 3529
结束页码: 3547
语种: 英语
Scopus关键词: Atmospheric movements
; Climate change
; Heat transfer
; Incident solar radiation
; Oceanography
; Solar radiation
; Tropics
; Atmospheric circulation
; Energy transport
; Hadley circulation
; Intertropical convergence zone
; Monsoonal precipitation
; Ocean circulation
; Tropical precipitation
; Upper ocean circulation
; Climate models
英文摘要: Summertime insolation intensified in the Northern Hemisphere during the mid-Holocene, resulting in enhanced monsoonal precipitation. In this study, the authors examine the changes in the annual-mean tropical precipitation as well as changes in atmospheric circulation and upper-ocean circulation in the mid-Holocene compared to the preindustrial climate, as simulated by 12 coupled climate models from PMIP3. In addition to the predominant zonally asymmetric changes in tropical precipitation, there is a small northward shift in the location of intense zonal-mean precipitation (mean ITCZ) in the mid-Holocene in the majority (9 out of 12) of the coupled climate models. In contrast, the shift is southward in simulations using an atmospheric model coupled to a slab ocean. The northward mean ITCZ shift in the coupled simulations is due to enhanced northward ocean heat transport across the equator [OHT(EQ)], which demands a compensating southward atmospheric energy transport across the equator, accomplished by shifting the Hadley cell and hence the mean ITCZ northward. The increased northward OHT(EQ) is primarily accomplished by changes in the upper-ocean gyre circulation in the tropical Pacific acting on the zonally asymmetric climatological temperature distribution. The gyre intensification results from the intensification of the monsoonal winds in the Northern Hemisphere and the weakening of the winds in the Southern Hemisphere, both of which are forced directly by the insolation changes. © 2017 American Meteorological Society. 资助项目: NSF, National Science Foundation
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49670
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
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
Recommended Citation:
Liu X.,Battisti D.S.,Donohoe A.. Tropical precipitation and cross-equatorial ocean heat transport during the mid-Holocene[J]. Journal of Climate,2017-01-01,30(10)