Flow Regimes over a Basin Induced by Upstream Katabatic Flows—An Idealized Modeling Study
Flow Regimes over a Basin Induced by Upstream Katabatic Flows—An Idealized Modeling Study
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上游下降流引起的流域内的流态——理想化建模研究
DOI：
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发表时间：
2016
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影响因子：
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通讯作者：
M. Lehner
中科院分区：
文献类型：
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作者：
M. Lehner
AbstractIdealized two-dimensional model simulations are performed to study the frequent nocturnal occurrence of downslope-windstorm-type flows in Arizona’s Meteor Crater. The model topography is a simplified representation of the Meteor Crater and its surroundings, with an approximately 1° mesoscale slope upstream and downstream of the crater basin. A strong surface-based inversion and a katabatic flow develop above the mesoscale slope as a result of radiational cooling. The temperature and flow profiles are evaluated against observations over low-angle slopes from two field campaigns, showing that the model’s turbulence parameterization has a strong impact on the near-surface conditions. The interaction of the katabatic flow with the basin topography leads to the formation of waves and hydraulic jumps over the basin. The simplified two-dimensional simulations show good qualitative agreement with observations of downslope-windstorm-type flows from the Meteor Crater. The sensitivity of the flow solution ov...
