气候变化领域集成服务门户(CCPortal): Ice sheet influence on atmospheric circulation explains the patterns of Pleistocene alpine glacier records in North America

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DOI	10.1016/j.epsl.2020.116115
	Ice sheet influence on atmospheric circulation explains the patterns of Pleistocene alpine glacier records in North America
	Tulenko J.P.; Lofverstrom M.; Briner J.P.
发表日期	2020
ISSN	0012821X
卷号	534
英文摘要	We explore the hypothesis that the relative size of Pleistocene ice sheets in North America modulated regional climate and alpine glaciation. We compare Pleistocene alpine glacier chronologies across North America with a comprehensive general circulation model using reconstructed ice sheet extents at peak glacial conditions during Marine Isotope Stage (MIS) 2 and MIS 4. The effect of continent-wide ice sheets on atmospheric circulation during MIS 2 led to warming in Beringia and cooling in the western US; less expansive ice sheets during MIS 4 resulted in weaker ice sheet modulation of atmospheric circulation. This led to preservation of MIS 4 moraines in Beringia due to limited MIS 2 glaciation (resulting in a MIS 2/4 moraine sequence) and overriding of MIS 4 moraines – for sites with existing chronologies – in the western United States during MIS 2 (resulting in a MIS 2/6 moraine sequence). Our results highlight how influential ice sheets are for regional climate conditions. © 2020 Elsevier B.V.
关键词	alpine glaciers Beringia Laurentide Ice Sheet Marine Isotope Stage 2 Marine Isotope Stage 4 Western US
英文关键词	Climatology; Glacial geology; Glaciers; Isotopes; Alpine glacier; Atmospheric circulation; Beringia; General circulation model; Laurentide ice sheets; Marine isotope stages; Regional climate; Western United States; Ice; atmospheric circulation; Beringia; climate variation; ice sheet; Laurentide Ice Sheet; marine isotope stage; paleoatmosphere; paleoclimate; Pleistocene; regional climate; valley glacier; North America
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202938
作者单位	Department of Geology, University at Buffalo, Buffalo, NY 14260, United States; Department of Geosciences, University of Arizona, Tucson, AZ 85721, United States
推荐引用方式 GB/T 7714	Tulenko J.P.,Lofverstrom M.,Briner J.P.. Ice sheet influence on atmospheric circulation explains the patterns of Pleistocene alpine glacier records in North America[J],2020,534.
APA	Tulenko J.P.,Lofverstrom M.,&Briner J.P..(2020).Ice sheet influence on atmospheric circulation explains the patterns of Pleistocene alpine glacier records in North America.Earth and Planetary Science Letters,534.
MLA	Tulenko J.P.,et al."Ice sheet influence on atmospheric circulation explains the patterns of Pleistocene alpine glacier records in North America".Earth and Planetary Science Letters 534(2020).