DOI: 10.1007/s00382-015-2502-8
Scopus记录号: 2-s2.0-84929709459
论文题名: Higher Laurentide and Greenland ice sheets strengthen the North Atlantic ocean circulation
作者: Gong X. ; Zhang X. ; Lohmann G. ; Wei W. ; Zhang X. ; Pfeiffer M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-01-02 起始页码: 139
结束页码: 150
语种: 英语
英文关键词: Atlantic meridional overturning circulation
; Glacial climate states
; Ice sheet
; North Atlantic gyres
; Western boundary current
英文摘要: During the last glacial–interglacial cycle, changes in the large-scale North Atlantic ocean circulation occurred, and at the same time topography of the Laurentide and Greenland ice sheets also varied. In this study, we focus on detecting the changes of the North Atlantic gyres, western boundary current, and the Atlantic meridional overturning circulation (AMOC) corresponding to different Laurentide and Greenland ice sheet topographies. Using an Earth System Model, we conducted simulations for five climate states with different ice sheet topographies: Pre-industrial, Mid Holocene, Last Glacial Maximum, 32 kilo years before present and Eemian interglacial. Our simulation results indicate that higher topographies of the Laurentide and Greenland ice sheets strengthen surface wind stress curl over the North Atlantic ocean, intensifying the subtropical and subpolar gyres and the western boundary currents. The corresponding decrease in sea surface height from subtropical to subpolar favors a stronger AMOC. An offshore shift of the Gulf Stream is also identified during the glacial periods relative to that during the Pre-industrial due to lower sea levels, explaining a weaker glacial Gulf Stream detected in proxy data. Meanwhile, the North Atlantic gyres and AMOC demonstrate a positively correlated relation under each of the climate conditions with higher ice sheets. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54089
Appears in Collections: 过去全球变化的重建
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作者单位: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bussestr. 24, Bremerhaven, Germany; School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff, United Kingdom; International Arctic Research Center and Department of Atmospheric Sciences, University of Alaska Fairbanks, Fairbanks, AK, United States
Recommended Citation:
Gong X.,Zhang X.,Lohmann G.,et al. Higher Laurentide and Greenland ice sheets strengthen the North Atlantic ocean circulation[J]. Climate Dynamics,2015-01-01,45(2017-01-02)