DOI: 10.1002/2016GL067832
论文题名: Bathymetry data reveal glaciers vulnerable to ice-ocean interaction in Uummannaq and Vaigat glacial fjords, west Greenland
作者: Rignot E. ; Fenty I. ; Xu Y. ; Cai C. ; Velicogna I. ; Cofaigh C.Ã. ; Dowdeswell J.A. ; Weinrebe W. ; Catania G. ; Duncan D.
刊名: Geophysical Research Letters
ISSN: 0094-9250
EISSN: 1944-8981
出版年: 2016
卷: 43, 期: 6 起始页码: 2667
结束页码: 2674
语种: 英语
英文关键词: Bathymetry
; Climate Change
; Glaciology
; Greenland
; Ice-Ocean interaction
; Oceanography
Scopus关键词: Bathymetry
; Climate change
; Glacial geology
; Glaciers
; Oceanography
; Radio systems
; Atlantic water
; Continental shelves
; Glacial erosion
; Glaciology
; Greenland
; Ice-ocean interactions
; Mass balance
; West Greenland
; Ice
; bathymetry
; echo sounding
; fjord
; glacial erosion
; glacier dynamics
; glacier mass balance
; ice-ocean interaction
; oceanography
; seafloor
; snowmelt
; Arctic
; Greenland
; Greenland Ice Sheet
; Uummannaq
英文摘要: Marine-terminating glaciers play a critical role in controlling Greenland's ice sheet mass balance. Their frontal margins interact vigorously with the ocean, but our understanding of this interaction is limited, in part, by a lack of bathymetry data. Here we present a multibeam echo sounding survey of 14 glacial fjords in the Uummannaq and Vaigat fjords, west Greenland, which extends from the continental shelf to the glacier fronts. The data reveal valleys with shallow sills, overdeepenings (>1300 m) from glacial erosion, and seafloor depths 100-1000 m deeper than in existing charts. Where fjords are deep enough, we detect the pervasive presence of warm, salty Atlantic Water (AW) (>2.5°C) with high melt potential, but we also find numerous glaciers grounded on shallow (<200 m) sills, standing in cold (<1°C) waters in otherwise deep fjords, i.e., with reduced melt potential. Bathymetric observations extending to the glacier fronts are critical to understand the glacier evolution. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978001461&doi=10.1002%2f2016GL067832&partnerID=40&md5=16baf11be733e455879d204826fbffcb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10213
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: Department Earth System Science, University of California, Irvine, CA, United States
Recommended Citation:
Rignot E.,Fenty I.,Xu Y.,et al. Bathymetry data reveal glaciers vulnerable to ice-ocean interaction in Uummannaq and Vaigat glacial fjords, west Greenland[J]. Geophysical Research Letters,2016-01-01,43(6).