DOI: 10.5194/cp-13-333-2017
Scopus记录号: 2-s2.0-85017383379
论文题名: Holocene evolution of the North Atlantic subsurface transport
作者: Repschläger J. ; Garbe-Schönberg D. ; Weinelt M. ; Schneider R.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2017
卷: 13, 期: 4 起始页码: 333
结束页码: 344
语种: 英语
Scopus关键词: Foraminifera
英文摘要: Previous studies suggested that short-term freshening events in the subpolar gyre can be counterbalanced by advection of saline waters from the subtropical gyre and thus stabilize the Atlantic Meridional Overturning Circulation (AMOC). However, little is known about the inter-gyre transport pathways. Here, we infer changes in surface and subsurface transport between the subtropical and polar North Atlantic during the last 11ĝ€000 years, by combining new temperature and salinity reconstructions obtained from combined δ 18O and Mgĝ€-ĝ•ĝ€-Ca measurements on surface and subsurface dwelling foraminifera with published foraminiferal abundance data from the subtropical North Atlantic, and with salinity and temperature data from the tropical and subpolar North Atlantic. This compilation implies an overall stable subtropical warm surface water transport since 10ĝ€-kaĝ€-BP. In contrast, subsurface warm water transport started at about 8ĝ€-ka but still with subsurface heat storage in the subtropical gyre. The full strength of intergyre exchange was probably reached only after the onset of northward transport of warm saline subsurface waters at about 7ĝ€-kaĝ€-BP, associated with the onset of the modern AMOC mode. A critical evaluation of different potential forcing mechanisms leads to the assumption that freshwater supply from the Laurentide Ice Sheet was the main control on subtropical to subpolar ocean transport at surface and subsurface levels. © 2017 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48931
Appears in Collections: 气候变化与战略
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Recommended Citation:
Repschläger J.,Garbe-Schönberg D.,Weinelt M.,et al. Holocene evolution of the North Atlantic subsurface transport[J]. Climate of the Past,2017-01-01,13(4)