globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116115
论文题名:
Ice sheet influence on atmospheric circulation explains the patterns of Pleistocene alpine glacier records in North America
作者: Tulenko J.P.; Lofverstrom M.; Briner J.P.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 534
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165316
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Earth and Planetary Science Letters,2020-01-01,534
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