Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084948 |
The Possible Transition From Glacial Surge to Ice Stream on Vavilov Ice Cap | |
Zheng, Whyjay1; Pritchard, Matthew E.1; Willis, Michael J.2,3; Stearns, Leigh A.4 | |
2019-12-10 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:23页码:13892-13902 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Surge-type glaciers typically undergo cyclical flow instability due to mass accumulation; however, some recent glacier surges have caused irreversible ice loss in a short period. At Vavilov Ice Cap, Russia, surge-like behavior initiated in 2013 and by spring 2019 the ice cap had lost 9.5 Gt of ice (11% mass of the entire basin). Using time series of surface elevation and glacier velocity derived from satellite optical and synthetic-aperture radar imagery, we identify a shift of flow pattern starting in 2017 when shear margins formed within the grounded marine piedmont fan. Multiple summer speedups correlate with warmer summers during 2015-2019 and suggest that surface melt may access the subglacial environment. Force balance analysis and examination of the Peclet number show that glacier thinning propagated upstream in 2016-2017, and diffusion became a significant dynamic response to thinning perturbations. Our results suggest that the glacier has entered a new ice stream-like regime. |
英文关键词 | glacial surge ice stream Vavilov Ice Cap shear margins Peclet number summer speedup |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000502026200001 |
WOS关键词 | TIDEWATER GLACIER ; SEVERNAYA-ZEMLYA ; WEST ANTARCTICA ; MASS-BALANCE ; DYNAMICS ; DESTABILIZATION ; VELOCITIES ; POSITION ; SVALBARD ; CLIMATE |
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/225180 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14850 USA; 2.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; 4.Univ Kansas, Dept Geol, Lawrence, KS 66045 USA |
推荐引用方式 GB/T 7714 | Zheng, Whyjay,Pritchard, Matthew E.,Willis, Michael J.,et al. The Possible Transition From Glacial Surge to Ice Stream on Vavilov Ice Cap[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(23):13892-13902. |
APA | Zheng, Whyjay,Pritchard, Matthew E.,Willis, Michael J.,&Stearns, Leigh A..(2019).The Possible Transition From Glacial Surge to Ice Stream on Vavilov Ice Cap.GEOPHYSICAL RESEARCH LETTERS,46(23),13892-13902. |
MLA | Zheng, Whyjay,et al."The Possible Transition From Glacial Surge to Ice Stream on Vavilov Ice Cap".GEOPHYSICAL RESEARCH LETTERS 46.23(2019):13892-13902. |
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