DOI: 10.1002/grl.50701
论文题名: Dependence of abrupt atlantic meridional ocean circulation changes on climate background states
作者: Gong X. ; Knorr G. ; Lohmann G. ; Zhang X.
刊名: Geophysical Research Letters
ISSN: 0094-8791
EISSN: 1944-8522
出版年: 2013
卷: 40, 期: 14 起始页码: 3698
结束页码: 3704
语种: 英语
英文关键词: abrupt AMOC change
; last glacial-interglacial cycle
; South Labrador Sea
Scopus关键词: abrupt AMOC change
; Atlantic meridional overturning circulations
; Deep-water formation
; Glacial-interglacial cycles
; Intermediate layers
; Labrador Sea
; Last Glacial Maximum
; Temperature inversions
; Climate change
; Glacial geology
; Oceanography
; climate change
; experimental study
; freshwater environment
; glacial-interglacial cycle
; Last Glacial Maximum
; meridional circulation
; numerical model
; paleoclimate
; Atlantic Ocean
; Labrador Sea
英文摘要: Abrupt decadal climate changes during the last glacial-interglacial cycle are less pronounced during maximum glacial conditions and absent during the Holocene. To further understand the underlying dynamics, we conduct hosing experiments for three climate states: preindustrial (PI), 32 kiloannum before present (ka B.P.), and Last Glacial Maximum (LGM). Our simulations show that a stronger temperature inversion between the surface and intermediate layer in the South Labrador Sea induces a faster restart of convective processes (32 ka B.P. > LGM > PI) during the initial resumption of the Atlantic meridional overturning circulation (AMOC). A few decades later, an AMOC overshoot is mainly linked to the advection of warmer and saltier intermediate-layer water from the tropical Atlantic into the South Labrador Sea, which causes a stronger deep-water formation than that before the freshwater perturbation. This mechanism is most pronounced during the 32 ka B.P., weaker during the LGM and absent during the PI. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880220169&doi=10.1002%2fgrl.50701&partnerID=40&md5=c1066e091198c1603fa467263fa837e8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6055
Appears in Collections: 气候减缓与适应
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作者单位: Alfred Wegener Institute for Polar and Marine Research, Bussestr. 24, D-27570 Bremerhavenc, Germany
Recommended Citation:
Gong X.,Knorr G.,Lohmann G.,et al. Dependence of abrupt atlantic meridional ocean circulation changes on climate background states[J]. Geophysical Research Letters,2013-01-01,40(14).