Ice‐dammed lake drainage in west Greenland: Drainage pattern and implications on ice flow and bedrock motion

Ice‐dammed lake drainage in west Greenland: Drainage pattern and implications on ice flow and bedrock motion
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格陵兰岛西部冰坝湖排水:排水模式及其对冰流和基岩运动的影响

DOI:
10.1002/2017gl074081
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发表时间:
2017
影响因子:
5.2
通讯作者:
J. Mouginot
J. Mouginot
中科院分区:
地球科学1区
文献类型:
--
作者:
K. Kjeldsen;S. Khan;A. Bjørk;K. Nielsen;J. Mouginot

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在格陵兰,冰坝湖泊经常排水,但这些事件的影响因地点而异。在这里,我们研究了格陵兰岛西部约40平方公里的Tininnilik湖的准循环行为及其对冰流和地壳变形的影响。数据显示,2010年在不到7天的时间里,1.83 ± 0.17 km3的水迅速流失,导致冰川筑坝的速度加快,以及由独立的湖边GPS记录证实的18.6 ± 0.1 mm的瞬时模拟弹性基岩隆起。由于冰坝湖泊在格陵兰岛很常见,我们的研究结果强调了在使用大地测量数据评估冰川均衡调整或弹性反弹时,除了冰量变化外,还包括其他表面负荷来源的重要性。此外,结果表明冰下流量和冰面速度之间的联系,重要的评估冰通量,从而质量平衡,在未来的气候变暖。
Ice‐dammed lakes drain frequently in Greenland, but the impacts of these events differ between sites. Here we study the quasi‐cyclic behavior of the ~40 km2 Lake Tininnilik in west Greenland and its impact on ice flow and crustal deformation. Data reveal rapid drainage of 1.83 ± 0.17 km3 of water in less than 7 days in 2010, leading to a speedup of the damming glacier, and an instantaneous modeled elastic bedrock uplift of 18.6 ± 0.1 mm confirmed by an independent lakeside GPS record. Since ice‐dammed lakes are common on Greenland, our results highlight the importance of including other sources of surface loading in addition to ice mass change, when assessing glacial isostatic adjustment or elastic rebound using geodetic data. Moreover, the results illustrates a linkage between subglacial discharge and ice surface velocity, important for assessing ice flux, and thus mass balance, in a future warming climate.
DOI: 10.1126/sciadv.1600931
发表时间: 2016-09
期刊: Science advances
影响因子: 13.6
作者:
Khan SA;Sasgen I;Bevis M;van Dam T;Bamber JL;Wahr J;Willis M;Kjær KH;Wouters B;Helm V;Csatho B;Fleming K;Bjørk AA;Aschwanden A;Knudsen P;Munneke PK
通讯作者: Munneke PK
来自连续原位 GPS 仪器的格陵兰冰盖八个主要海洋终止出口冰川的季节速度
DOI: 10.5194/essdd-6-27-2013
发表时间: 2013
期刊: --
影响因子: --
作者:
Ahlstrøm A
通讯作者: Ahlstrøm A