DOI: 10.1016/j.epsl.2020.116185
论文题名: Climatic patterns over the European Alps during the LGM derived from inversion of the paleo-ice extent
作者: Višnjević V. ; Herman F. ; Prasicek G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 538 语种: 英语
中文关键词: Alps
; equilibrium line altitude
; glacier mass balance
; ice caps
; ice extent
; paleoclimate
英文关键词: Glacial geology
; Inverse problems
; Moisture
; Snow
; Topography
; Alps
; Equilibrium line altitudes
; Glacier mass balance
; Ice-caps
; Paleoclimates
; Ice
; climate modeling
; climate variation
; data inversion
; glacier mass balance
; global climate
; ice cap
; Last Glacial Maximum
; paleoclimate
; Alps
; Fennoscandia
英文摘要: Quaternary climate has been dominated by alternating glacial and interglacial periods. While the timing and extent of past ice caps are well documented, local variations in temperature and precipitation as a response to cyclic glaciations are not resolved. Resolving these issues is necessary for understanding regional and global climate circulation. In particular, the impact of the cold high-pressure zone above the Fennoscandian ice cap on the position of the jet stream in Europe, and a possible change in the direction and the source of moisture flow are still debated. Here we reconstruct climate conditions that led to the observed ice extent in the European Alps during the last glacial maximum (LGM). Using a new inverse method to reconstruct the spatially variable position of the equilibrium line altitude (ELA), we investigate whether the Alpine LGM ice cap dominantly received precipitation in the south due to a strong southward shift of the westerlies in midlatitudes. We report inversion results that enable us to estimate the role of climate, inversion method parameters, ice dynamics, flexure and topography in modulating the inferred equilibrium line altitude. Our main finding is the increase of the position of the ELA from west to east and from north to south of the mountain range, which suggest dominant moisture delivery over the Alps during the LGM relatively similar to today. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165327
Appears in Collections: 气候变化与战略
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作者单位: Institute of Earth Surface Dynamics, University of Lausanne, Lausanne, Switzerland; Interdisciplinary Center for Mountain Research, University of Lausanne, Bramois, Switzerland
Recommended Citation:
Višnjević V.,Herman F.,Prasicek G.. Climatic patterns over the European Alps during the LGM derived from inversion of the paleo-ice extent[J]. Earth and Planetary Science Letters,2020-01-01,538