DOI: 10.1002/2016GL067821
论文题名: Ice cap melting and low-viscosity crustal root explain the narrow geodetic uplift of the Western Alps
作者: Chéry J. ; Genti M. ; Vernant P.
刊名: Geophysical Research Letters
ISSN: 0094-9143
EISSN: 1944-8874
出版年: 2016
卷: 43, 期: 7 起始页码: 3193
结束页码: 3200
语种: 英语
英文关键词: Alps
; geodesy
; lithosphere rheology
; postglacial rebound
; vertical motion
Scopus关键词: Melting
; Snow
; Structural geology
; Viscosity
; Alps
; Geodetic measurements
; Geodetic observation
; Horizontal motion
; Postglacial rebound
; Uppermost mantle
; Vertical motions
; Viscosity contrast
; Geodesy
英文摘要: More than 10 years of geodetic measurements demonstrate an uplift rate of 1-3 mm/yr of the high topography region of the Western Alps. By contrast, no significant horizontal motion has been detected. Two uplift mechanisms have been proposed: (1) the isostatic response to denudation responsible for only a fraction of the observed uplift and (2) the rebound induced by the Wurmian ice cap melting which predicts a broader uplifting region than the one evidenced by geodetic observations. Using a numerical model to fit the geodetic data, we show that a crustal viscosity contrast between the foreland and the central part of the Alps, the latter being weaker with a viscosity of 1021 Pa s, is needed. The vertical rates are enhanced if the strong uppermost mantle beneath the Moho is interrupted across the Alps, therefore allowing a weak vertical rheological anomaly over the entire lithosphere. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979468088&doi=10.1002%2f2016GL067821&partnerID=40&md5=6e3f47640560c8192ea39f59a1a28129
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10106
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Geosciences Montpellier, CNRS, Université de Montpellier, Montpellier, France
Recommended Citation:
Chéry J.,Genti M.,Vernant P.. Ice cap melting and low-viscosity crustal root explain the narrow geodetic uplift of the Western Alps[J]. Geophysical Research Letters,2016-01-01,43(7).