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DOI | 10.1002/2018GL077204 |
A Century of Stability of Avannarleq and Kujalleq Glaciers, West Greenland, Explained Using High-Resolution Airborne Gravity and Other Data | |
An, L.1; Rignot, E.1,2; Mouginot, J.1; Millan, R.1 | |
2018-04-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:7页码:3156-3163 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The evolution of Greenland glaciers in a warming climate depends on their depth below sea level, flow speed, surface melt, and ocean-induced undercutting at the calving front. We present an innovative mapping of bed topography in the frontal regions of Sermeq Avannarleq and Kujalleq, two major glaciers flowing into the ice-choked Torssukatak Fjord, central west Greenland. The mapping combines a mass conservation algorithm inland, multibeam echo sounding data in the fjord, and high-resolution airborne gravity data at the ice-ocean transition where other approaches have traditionally failed. We obtain a reliable, precision (+/- 40 m) solution for bed topography across the ice-ocean boundary. The results reveal a 700 m deep fjord that abruptly ends on a 100-300 m deep sill along the calving fronts. The shallow sills explain the presence of stranded icebergs, the resilience of the glaciers to ocean-induced undercutting by warm Atlantic water, and their remarkable stability over the past century. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435743400032 |
WOS关键词 | ICE-SHEET ; JAKOBSHAVN ISBRAE ; BED ELEVATION ; OCEAN WATERS ; ACCELERATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27164 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA |
推荐引用方式 GB/T 7714 | An, L.,Rignot, E.,Mouginot, J.,et al. A Century of Stability of Avannarleq and Kujalleq Glaciers, West Greenland, Explained Using High-Resolution Airborne Gravity and Other Data[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(7):3156-3163. |
APA | An, L.,Rignot, E.,Mouginot, J.,&Millan, R..(2018).A Century of Stability of Avannarleq and Kujalleq Glaciers, West Greenland, Explained Using High-Resolution Airborne Gravity and Other Data.GEOPHYSICAL RESEARCH LETTERS,45(7),3156-3163. |
MLA | An, L.,et al."A Century of Stability of Avannarleq and Kujalleq Glaciers, West Greenland, Explained Using High-Resolution Airborne Gravity and Other Data".GEOPHYSICAL RESEARCH LETTERS 45.7(2018):3156-3163. |
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