DOI: 10.5194/cp-10-1723-2014
Scopus记录号: 2-s2.0-84907286925
论文题名: The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum
作者: Marson J.M. ; Wainer I. ; Mata M.M. ; Liu Z.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 5 起始页码: 1723
结束页码: 1734
语种: 英语
Scopus关键词: Antarctic Bottom Water
; climate effect
; deglaciation
; Heinrich event
; inflow
; Last Glacial Maximum
; meltwater
; meridional circulation
; North Atlantic Deep Water
; paleoclimate
; water column
; water mass
英文摘要: A NCAR-CCSM3 (National Center for Atmospheric Research - Community Climate System Model version 3) state-of-the-art transient paleoclimate simulation with prescribed freshwater inflows is used to investigate the changes and evolution of the South Atlantic water mass structure from the Last Glacial Maximum (LGM) to the present day. Model results show that 21 000 yr ago the water column was substantially stratified due to the presence of a saltier-than-today Antarctic Bottom Water (AABW), forming a salinity barrier that prevented dense waters from the Northern Hemisphere from sinking. This salinity barrier started to erode after the termination of the Heinrich event 1, when its associated meltwater was transported southward, freshening the AABW. The removal of the barrier after 14 ka triggered the production of the North Atlantic Deep Water (NADW), which spread into the deeper layers of the South Atlantic at the onset of the Holocene. At this point, the NADW acquired its modern-day structure, establishing a deeper Atlantic meridional overturning circulation (AMOC). © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49223
Appears in Collections: 气候变化与战略
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Recommended Citation:
Marson J.M.,Wainer I.,Mata M.M.,et al. The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum[J]. Climate of the Past,2014-01-01,10(5)