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首页> 外文期刊>Geophysical Research Letters >Application of a three-dimensional numerical model to Lake Vostok: An Antarctic subglacial lake
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Application of a three-dimensional numerical model to Lake Vostok: An Antarctic subglacial lake

机译:三维数值模型在沃斯托克湖上的应用:南极冰河下湖泊

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摘要

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. [References: 13]
机译:使用三维数值模型研究了南极东部中部冰川湖沃斯托克湖在两种水柱厚度情景下的循环。在水柱厚度恒定(覆盖湖泊的倾斜冰盖与湖床之间的距离)的情况下,循环是正压的,但是在水柱厚度更实际的情况下,流量是斜压的。地热通量更有效地加热了现实湖泊的浅水区,从而形成了不同的环流,从而形成了不同的水平密度结构。两种情况之间的差异和不确定性凸显了很大程度上未知的水柱厚度和地热通量对确定湖泊环流的重要性。 [参考:13]

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