Horizontal Heat Fluxes over Complex Terrain Computed Using a Simple Mixed-Layer Model and a Numerical Model
Horizontal Heat Fluxes over Complex Terrain Computed Using a Simple Mixed-Layer Model and a Numerical Model
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使用简单混合层模型和数值模型计算复杂地形上的水平热通量
DOI：
10.1175/1520-0450-34.2.549
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Tuneo Kuwagata
中科院分区：
文献类型：
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作者：
F. Kimura;Tuneo Kuwagata
摘要本文用不考虑凝结过程的二维数值模式模拟了周期性山谷上的热致局地环流。在晴朗、无风的白天，热量通过上升风及其回流从山区输送到山谷地区。然而，比湿度以相反的方式传输。感热水平交换率具有水平尺度相似性，只要水平尺度小于100 km左右的临界宽度。大气柱中任意一点的感热积累可以用一个简单的均匀混合层模式（UML）来估计。该模型假设混合层中的位温在垂直和水平方向上都是均匀的，即使在复杂的地形上也是如此。只有当地形的水平尺度小于临界宽度并且地形高程的最大差异较小时，UML模型才有效..
Abstract The thermally induced local circulation over a periodic valley is simulated by a two-dimensional numerical model that does not include condensational processes. During the daytime of a clear, calm day, heat is transported from the mountainous region to the valley area by anabatic wind and its return flow. The specific humidity is, however, transported in an inverse manner. The horizontal exchange rate of sensible heat has a horizontal scale similarity, as long as the horizontal scale is less than a critical width of about 100 km. The sensible heat accumulated in an atmospheric column over an arbitrary point can be estimated by a simple model termed the uniform mixed-layer model (UML). The model assumes that the potential temperature is both vertically and horizontally uniform in the mixed layer, even over the complex terrain. The UML model is valid only when the horizontal scale of the topography is less than the critical width and the maximum difference in the elevation of the topography is less...