DOI: 10.1016/j.earscirev.2021.103645
论文题名: The influence of ice sheet and solar insolation on Holocene moisture evolution in northern Central Asia
作者: Lan J. ; Wang T. ; Dong J. ; Kang S. ; Cheng P. ; Zhou K. ; Liu X. ; Wang Y. ; Ma L.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2021
卷: 217 语种: 英语
中文关键词: Atmospheric circulation
; Holocene moisture
; Laurentide and Fennoscandian ice sheets
; North Atlantic oscillation
; Northern Central Asia
英文关键词: atmospheric circulation
; atmospheric moisture
; climate variation
; global climate
; Holocene
; ice sheet
; insolation
; Laurentide Ice Sheet
; North Atlantic Oscillation
; paleoclimate
; solar radiation
; Central Asia
英文摘要: The arid region of Central Asia is one of the world's major sources of dust and exerts a significant influence on marine ecosystems, atmospheric carbon dioxide concentrations, the global radiation budget, and thus global climate change. Recent global warming has considerably reduced mid-latitude net precipitation by decreasing the latitudinal temperature gradient between the Equator and the Arctic; however, the influence of ice sheet and solar insolation on moisture evolution in Central Asia during the Holocene remains uncertain. Here we show that the relative wet conditions during the early Holocene in northern Central Asia (NCA) were controlled principally by the southern position of the mid-latitude Westerlies under the negative phase of the North Atlantic Oscillation (NAO), a pattern that was influenced by the substantial remnants of the Laurentide and Fennoscandian ice sheets. Subsequent northward migration of the mid-latitude Westerlies under a positive NAO phase resulted in persistent drought conditions during the middle Holocene thermal maximum, due to the combined effects of relatively higher summer insolation and Arctic amplification as well as sea ice loss. In contrast, southward migration of the mid-latitude Westerlies since approximately 3.6 cal kyr BP, driven by declining summer insolation and coincident with the negative NAO phase, increased regional precipitation towards to persistent relatively wet conditions in Central Asia. This reconstructed pattern of Holocene moisture availability contrasts markedly with the increase in precipitation over Central Asia under the current anthropogenically forced warming, thereby justifying further investigation into the multiple forcing mechanisms driving natural and anthropogenic climate change. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166437
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; China-Pakistan Joint Research Center on Earth Sciences, Chengdu, 610041, China; Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin, 300072, China; Xi'an Institute for Innovative Earth Environment Research, Xi'an, 710061, China
Recommended Citation:
Lan J.,Wang T.,Dong J.,et al. The influence of ice sheet and solar insolation on Holocene moisture evolution in northern Central Asia[J]. Earth Science Reviews,2021-01-01,217