DOI: 10.5194/cp-9-935-2013
Scopus记录号: 2-s2.0-84881174122
论文题名: Climatic impacts of fresh water hosing under last glacial Maximum conditions: A multi-model study
作者: Kageyama M. ; Merkel U. ; Otto-Bliesner B. ; Prange M. ; Abe-Ouchi A. ; Lohmann G. ; Ohgaito R. ; Roche D.M. ; Singarayer J. ; Swingedouw D. ; Zhang X.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 2 起始页码: 935
结束页码: 953
语种: 英语
Scopus关键词: climate change
; climate modeling
; cooling
; correlation
; freshwater environment
; Last Glacial Maximum
; melting
; numerical model
; resolution
; Southern Hemisphere
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Fresh water hosing simulations, in which a fresh water flux is imposed in the North Atlantic to force fluctuations of the Atlantic Meridional Overturning Circulation, have been routinely performed, first to study the climatic signature of different states of this circulation, then, under present or future conditions, to investigate the potential impact of a partial melting of the Greenland ice sheet. The most compelling examples of climatic changes potentially related to AMOC abrupt variations, however, are found in high resolution palaeo-records from around the globe for the last glacial period. To study those more specifically, more and more fresh water hosing experiments have been performed under glacial conditions in the recent years. Here we compare an ensemble constituted by 11 such simulations run with 6 different climate models. All simulations follow a slightly different design, but are sufficiently close in their design to be compared. They all study the impact of a fresh water hosing imposed in the extra-tropical North Atlantic. Common features in the model responses to hosing are the cooling over the North Atlantic, extending along the sub-tropical gyre in the tropical North Atlantic, the southward shift of the Atlantic ITCZ and the weakening of the African and Indian monsoons. On the other hand, the expression of the bipolar see-saw, i.e., warming in the Southern Hemisphere, differs from model to model, with some restricting it to the South Atlantic and specific regions of the southern ocean while others simulate a widespread southern ocean warming. The relationships between the features common to most models, i.e., climate changes over the north and tropical Atlantic, African and Asian monsoon regions, are further quantified. These suggest a tight correlation between the temperature and precipitation changes over the extra-tropical North Atlantic, but different pathways for the teleconnections between the AMOC/North Atlantic region and the African and Indian monsoon regions.© 2013 Author(s). 资助项目: ERC, Fonds National de la Reserche Luxembourg
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49425
Appears in Collections: 气候变化与战略
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Recommended Citation:
Kageyama M.,Merkel U.,Otto-Bliesner B.,et al. Climatic impacts of fresh water hosing under last glacial Maximum conditions: A multi-model study[J]. Climate of the Past,2013-01-01,9(2)