THE FLOW OF A STABLE ATMOSPHERE OVER A HEATED ISLAND, PART 1
THE FLOW OF A STABLE ATMOSPHERE OVER A HEATED ISLAND, PART 1
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DOI：
10.1175/1520-0469(1953)010
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发表时间：
1953-04
期刊：
影响因子：
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通讯作者：
J. Malkus;M. Stern
中科院分区：
文献类型：
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作者：
J. Malkus;M. Stern
在第一部分中，当假定加热作为坐标的函数分布时，研究了稳定气流绕过平坦小岛时产生的对流运动。在第二部分中，研究了加热的机理。结果表明，热源服从涡流传导方程，是由混合地面层中的湍流涡流建立的。流线位移可分为两个分量，一个服从山脊气流方程，另一个服从热传导方程，后者只在岛屿附近重要。与加热岛相对应的“等效山”可以用解析的方法来确定；它只取决于地面的温度分布、风速、地面层的涡流传导性和不受干扰的稳定性。其幅值与最大流线位移有关。南塔基特岛的“当量山”是这样计算的。
Abstract In Part I, the convective motions produced by the flow of a stable air stream over a small flat island were studied when the distribution of heating as a function of the coordinates was assumed. In Part II, the mechanism of the heating is examined. It is found that the heat source obeys an eddy-conduction equation and is established by turbulent eddying in the mixed ground layer. The streamline displacement may be divided into two components, one obeying the equation for air flow over a mountain ridge and the other obeying a heat-conduction equation, the latter component being important only in the near vicinity of the island. An “equivalent mountain” corresponding to the heated island may be specified analytically; it depends only upon the temperature distribution along the surface, the wind speed, the eddy conductivity in the ground layer, and the undisturbed stability. Its amplitude is related to the maximum streamline displacement. The “equivalent mountain” for Nantucket Island is calculated ...