globalchange  > 气候减缓与适应
DOI: 10.1029/2017JF004499
Scopus记录号: 2-s2.0-85051950581
论文题名:
Geometric Controls on Tidewater Glacier Retreat in Central Western Greenland
作者: Catania G.A.; Stearns L.A.; Sutherland D.A.; Fried M.J.; Bartholomaus T.C.; Morlighem M.; Shroyer E.; Nash J.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期:8
起始页码: 2024
结束页码: 2038
语种: 英语
英文关键词: Greeenland ; terminus retreat ; tidewater glacier
英文摘要: Glacier terminus changes are one of the hallmarks of worldwide glacier change, and thus, there is significant focus on the controls and limits to retreat in the literature. Here we use the observational record of glacier terminus change from satellite remote sensing data to characterize glacier retreat in central West Greenland with a focus on the last 30 years. We compare terminus observations of retreat to glacier/fjord geometry from available bed and bathymetry data and find that glacier retreat accelerates through wide, overdeepened parts of the bed characterized by retrograde bed slopes. We find that the morphology of the overdeepening can be used as a predictive measure for the length of retreat and that short regions (less than twice the seasonal change in terminus position) of the bed with prograde bed slopes are not sufficient to stop a retreating terminus. Even narrow overdeepenings can control glacier retreat, likely because they focus subglacial runoff, which entrains warm water in the fjords when it emerges at the grounding line and melts the terminus, creating enhanced local retreat. Future retreat of these glaciers is assessed given upstream fjord geometry. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113379
Appears in Collections:气候减缓与适应

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作者单位: Institute for Geophysics, University of Texas at Austin, Austin, TX, United States; Department of Geosciences, University of Texas at Austin, Austin, TX, United States; Department of Geology, University of Kansas, Lawrence, KS, United States; Geological Sciences, University of Oregon, Eugene, OR, United States; Department of Geological Sciences, University of Idaho, Moscow, ID, United States; Earth System Science, University of California, Irvine, CA, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States

Recommended Citation:
Catania G.A.,Stearns L.A.,Sutherland D.A.,et al. Geometric Controls on Tidewater Glacier Retreat in Central Western Greenland[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(8)
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