Application of a three‐dimensional numerical model to Lake Vostok: An Antarctic subglacial lake
Application of a three‐dimensional numerical model to Lake Vostok: An Antarctic subglacial lake
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三维数值模型在南极冰下湖沃斯托克湖中的应用
DOI：
10.1029/2000gl012107
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发表时间：
2001
影响因子：
5.2
通讯作者：
Michael J. M. Williams
中科院分区：
文献类型：
--
作者：
Michael J. M. Williams
利用一个三维数值模型，对东南极洲中部的一个冰下湖——沃斯托克湖在两种水柱厚度情景下的环流进行了研究。在水柱厚度恒定（覆盖湖泊的倾斜冰盖与湖床之间的距离）的情景下，环流是正压的，但在更符合实际的水柱厚度情况下，流动是斜压的。不同的环流是由于地热热通量更有效地加热了实际湖泊的浅水区，从而形成了不同的水平密度结构。这两种情景之间的差异和不确定性凸显了在很大程度上未知的水柱厚度和地热热通量在确定湖泊环流方面的重要性。
The circulation in two water column thickness scenarios for Lake Vostok, a subglacial lake in central East Antarctica, is investigated using a three‐dimensional numerical model. In a scenario with a constant water column thickness (the distance between the sloping ice sheet which caps the lake and the lake bed) the circulation is barotropic, but with a more realistic water column thickness the flow is baroclinic. The different circulations result from the geothermal heat flux warming shallow regions of the realistic lake more efficiently, thus forming a different horizontal density structure. The differences and uncertainties between the two scenarios highlight the importance that the largely unknown water column thickness and geothermal heat flux have in determining the circulation in the lake.