The triggering of subglacial lake drainage during rapid glacier drawdown: Crane Glacier, Antarctic Peninsula
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چکیده
منابع مشابه
The triggering of sub-glacial lake drainage during the rapid glacier drawdown: Crane Glacier, Antarctic Peninsula
Ice surface altimetry from ICESat-1 and NASA aircraft altimeter overflights spanning 2002– 09 indicate that a region of lower Crane Glacier, Antarctic Peninsula, shows an unusual temporal pattern of elevation loss: a period of very rapid drawdown ( 91ma between September 2004 and September 2005) bounded by periods of large but more moderate rates (23ma until September 2004; 12ma after September...
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We present conventional and swath altimetry data from Cryosat-2 revealing a system of subglacial lakes that drained between June 2013 and January 2014 under the central part of Thwaites Glacier, West Antarctica. Much of the 10 drainage happened in less than six months, with an apparent connection between three lakes spanning more than 130 km. Hydropotential analysis of the glacier bed shows a l...
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[1] We present measurements of ice thickness, gravimetry and surface elevation on Pine Island Glacier, West Antarctica, separated by a period of 49 years. At one station, on the main trunk of the glacier we measured a surface elevation lowering with no significant change in ice thickness. We interpret these as indicating subglacial erosion of 31.8 13.4 m at this location, at a mean rate over th...
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1 School of Geography, University of Leeds, Leeds, United Kingdom, 2 Geography, Staffordshire University, Stoke-on-Trent, United Kingdom, 3 Department of Geography, University of Sheffield, Sheffield, United Kingdom, 4 Arctic Technology Centre, Technical University of Denmark, Kemitorvet, Lyngby, Denmark, 5 Department of Geography and Geology, University of Copenhagen, Copenhagen, Denmark, 6 Ge...
متن کاملModeling of subglacial hydrological development following rapid supraglacial lake drainage
The rapid drainage of supraglacial lakes injects substantial volumes of water to the bed of the Greenland ice sheet over short timescales. The effect of these water pulses on the development of basal hydrological systems is largely unknown. To address this, we develop a lake drainage model incorporating both (1) a subglacial radial flux element driven by elastic hydraulic jacking and (2) downst...
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ژورنال
عنوان ژورنال: Annals of Glaciology
سال: 2011
ISSN: 0260-3055,1727-5644
DOI: 10.3189/172756411799096204