DOI: 10.1016/j.quascirev.2015.04.007
Scopus记录号: 2-s2.0-84928781743
论文题名: A new glacial isostatic adjustment model of the Innuitian Ice Sheet, Arctic Canada
作者: Simon K.M. ; James T.S. ; Dyke A.S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 119 起始页码: 11
结束页码: 21
语种: 英语
英文关键词: Glacial isostatic adjustment
; GPS
; Innuitian Ice Sheet
; Relative sea-level
Scopus关键词: Forecasting
; Geology
; Glaciers
; Global positioning system
; Ice
; Level measurement
; Sea level
; Glacial isostatic adjustment models
; Glacial Isostatic Adjustments
; Global sea level rise
; Ice sheet
; Ice sheet models
; Ice sheet reconstruction
; Relative sea level
; Vertical crustal motions
; Glacial geology
; crustal movement
; elasticity
; GPS
; ice sheet
; lowland environment
; measurement method
; model test
; Postglacial
; prediction
; sea level change
; valley glacier
; Canada
; Canadian Arctic
英文摘要: A reconstruction of the Innuitian Ice Sheet (IIS) is developed that incorporates first-order constraints on its spatial extent and history as suggested by regional glacial geology studies. Glacial isostatic adjustment modelling of this ice sheet provides relative sea-level predictions that are in good agreement with measurements of post-glacial sea-level change at 18 locations. The results indicate peak thicknesses of the Innuitian Ice Sheet of approximately 1600m, up to 400m thicker than the minimum peak thicknesses estimated from glacial geology studies, but between approximately 1000 to 1500m thinner than the peak thicknesses present in previous GIA models. The thickness history of the best-fit Innuitian Ice Sheet model developed here, termed SJD15, differs from the ICE-5G reconstruction and provides an improved fit to sea-level measurements from the lowland sector of the ice sheet. Both models provide a similar fit to relative sea-level measurements from the alpine sector. The vertical crustal motion predictions of the best-fit IIS model are in general agreement with limited GPS observations, after correction for a significant elastic crustal response to present-day ice mass change. The new model provides approximately 2.7m equivalent contribution to global sea-level rise, an increase of+0.6m compared to the Innuitian portion of ICE-5G. SJD15 is qualitatively more similar to the recent ICE-6G ice sheet reconstruction, which appears to also include more spatially extensive ice cover in the Innuitian region than ICE-5G. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59919
Appears in Collections: 过去全球变化的重建
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作者单位: School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada; Geological Survey of Canada - Pacific, Natural Resources Canada, Sidney, BC, Canada; Department of Earth Sciences, Dalhousie University, Halifax, NS, Canada; Department of Anthropology, McGill University, MontrealQC, Canada
Recommended Citation:
Simon K.M.,James T.S.,Dyke A.S.. A new glacial isostatic adjustment model of the Innuitian Ice Sheet, Arctic Canada[J]. Quaternary Science Reviews,2015-01-01,119