Advances in modelling subglacial lakes and their interaction with the Antarctic ice sheet
Advances in modelling subglacial lakes and their interaction with the Antarctic ice sheet
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冰下湖泊及其与南极冰盖相互作用建模的进展
DOI：
10.1098/rsta.2014.0296
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
M. Thoma
中科院分区：
文献类型：
--
作者：
F. Pattyn;S. Carter;M. Thoma
冰下湖泊长期以来被认为是冰盖下水力隔离的水体。随着重复通过卫星测高的出现以及多个湖泊排水和充水的发现（与超过 200 公里的输水距离相关），这种观点发生了根本性的改变。冰下湖泊的存在也会影响冰的动力学，导致冰川加速。此外，南极冰盖下的冰下融化比之前想象的更为广泛，冰下融化速率可以解释冰下湖泊和水运输中水储存的可用性。冰下湖泊中冰下水排放的建模本质上遵循硬床上冰下通道的水力学，其中冰盖表面坡度是触发冰下湖泊排放的主要控制因素。最近的证据还表明，南极洲西部可变形沉积物中形成了通道，耕地和冰之间存在显着的水交换。大多数活跃的湖泊会在短时间内流失，并对上游变化做出快速反应。由于水循环，一些南极冰下湖泊与冰盖表现出复杂的相互作用。因此，从建模的角度来看，冰下湖泊可以被视为嵌入冰架下方的封闭小海洋。
Subglacial lakes have long been considered hydraulically isolated water bodies underneath ice sheets. This view changed radically with the advent of repeat-pass satellite altimetry and the discovery of multiple lake discharges and water infill, associated with water transfer over distances of more than 200 km. The presence of subglacial lakes also influences ice dynamics, leading to glacier acceleration. Furthermore, subglacial melting under the Antarctic ice sheet is more widespread than previously thought, and subglacial melt rates may explain the availability for water storage in subglacial lakes and water transport. Modelling of subglacial water discharge in subglacial lakes essentially follows hydraulics of subglacial channels on a hard bed, where ice sheet surface slope is a major control on triggering subglacial lake discharge. Recent evidence also points to the development of channels in deformable sediment in West Antarctica, with significant water exchanges between till and ice. Most active lakes drain over short time scales and respond rapidly to upstream variations. Several Antarctic subglacial lakes exhibit complex interactions with the ice sheet due to water circulation. Subglacial lakes can therefore—from a modelling point of view—be seen as confined small oceans underneath an imbedded ice shelf.
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影响因子：
--
作者：
A. Wright;D. Young;J. Roberts;D. Schroeder;J. Bamber;J. Dowdeswell;N. Young;A. L. Brocq;R. Wa
通讯作者：
A. Wright;D. Young;J. Roberts;D. Schroeder;J. Bamber;J. Dowdeswell;N. Young;A. L. Brocq;R. Wa
模拟南极洲冰下沃斯托克湖的混合和循环
影响因子：
2.3
作者：
Grosfeld
通讯作者：
Grosfeld
影响因子：
5.3
作者：
I. Filina;D. Blankenship;M. Thoma;V. Lukin;V. N. Masolov;Mrinal K. Sen
通讯作者：
I. Filina;D. Blankenship;M. Thoma;V. Lukin;V. N. Masolov;Mrinal K. Sen
活跃的西南极冰下湖的边界条件：对冰盖下水储存的影响
DOI：
10.5194/tc-8-15-2014
发表时间：
2014
期刊：
The Cryosphere
影响因子：
--
作者：
Siegert M
通讯作者：
Siegert M
影响因子：
5.2
作者：
J. Woodward;A. Smith;N. Ross;M. Thoma;H. Corr;E. King;Matt A. King;K. Grosfeld;M. Tranter;M. Siegert
通讯作者：
J. Woodward;A. Smith;N. Ross;M. Thoma;H. Corr;E. King;Matt A. King;K. Grosfeld;M. Tranter;M. Siegert