globalchange  > 气候减缓与适应
DOI: 10.1002/2017JF004409
Scopus记录号: 2-s2.0-85046666732
论文题名:
Dynamics of Active Subglacial Lakes in Recovery Ice Stream
作者: Dow C.F.; Werder M.A.; Babonis G.; Nowicki S.; Walker R.T.; Csatho B.; Morlighem M.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期:4
起始页码: 837
结束页码: 850
语种: 英语
英文关键词: glacier hydrology ; ice dynamics ; ice streams ; modeling ; subglacial lakes
Scopus关键词: drainage ; glacial hydrology ; glacial lake ; glacier dynamics ; ice stream ; numerical model ; satellite altimetry ; subglacial environment
英文摘要: Recovery Ice Stream has a substantial number of active subglacial lakes that are observed, with satellite altimetry, to grow and drain over multiple years. These lakes store and release water that could be important for controlling the velocity of the ice stream. We apply a subglacial hydrology model to analyze lake growth and drainage characteristics together with the simultaneous development of the ice stream hydrological network. Our outputs produce a good match between modeled lake location and those identified using satellite altimetry for many of the lakes. The modeled subglacial system demonstrates development of pressure waves that initiate at the ice stream neck and transit to within 100 km of the terminus. These waves alter the hydraulic potential of the ice stream and encourage growth and drainage of the subglacial lakes. Lake drainage can cause large R-channels to develop between basal overdeepenings that persist for multiple years. The pressure waves, along with lake growth and drainage rates, do not identically repeat over multiple years due to basal network development. This suggests that the subglacial hydrology of Recovery Ice Stream is influenced by regional drainage development on the scale of hundreds of kilometers rather than local conditions over tens of kilometers. ©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/114189
Appears in Collections:气候减缓与适应

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作者单位: Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON, Canada; Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Zurich, Switzerland; Geology Department, State University of New York at Buffalo, Buffalo, NY, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Department of Earth System Science, University of California, Irvine, CA, United States

Recommended Citation:
Dow C.F.,Werder M.A.,Babonis G.,et al. Dynamics of Active Subglacial Lakes in Recovery Ice Stream[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(4)
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