DOI: 10.1002/2016GL069846
论文题名: Destabilization of glacial climate by the radiative impact of Atlantic Meridional Overturning Circulation disruptions
作者: Galbraith E.D. ; Merlis T.M. ; Palter J.B.
刊名: Geophysical Research Letters
ISSN: 0094-8808
EISSN: 1944-8539
出版年: 2016
卷: 43, 期: 15 起始页码: 8214
结束页码: 8221
语种: 英语
英文关键词: bipolar seesaw
; climate model
; deglaciation
; ice ages
; ocean circulation
; radiative balance
Scopus关键词: Carbon dioxide
; Climate models
; Glacial geology
; Ice
; Bipolar seesaw
; Deglaciations
; Ice age
; Ocean circulation
; Radiative balance
; Oceanography
英文摘要: During each of the dramatic global warmings that ended the Pleistocene ice ages, the Atlantic Meridional Overturning Circulation (AMOC) was disrupted. It is not clear whether this was a contributing cause or simply an effect of deglaciation. Here we show that in an ensemble of simulations with a global climate model, AMOC disruption causes a consistent and sustained positive radiative imbalance of ~0.4 W m−2. The imbalance is accommodated by heat accumulation in the ocean interior, representing an overall planetary warming, subsequently released by deep convection in the North Atlantic when the AMOC resumes. The results suggest a means by which AMOC disruptions could have helped to tip the planet out of stable glaciated states. However, the fact that AMOC disruptions occurred during prior Heinrich Stadials without causing deglaciation shows that other factors, such as ice sheet dynamics, or controls on CO2, were also key for deglaciation. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981295728&doi=10.1002%2f2016GL069846&partnerID=40&md5=d9e94dc994b712fdae68224ac8290e77
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9771
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: ICREA, Barcelona, Spain
Recommended Citation:
Galbraith E.D.,Merlis T.M.,Palter J.B.. Destabilization of glacial climate by the radiative impact of Atlantic Meridional Overturning Circulation disruptions[J]. Geophysical Research Letters,2016-01-01,43(15).