Numerical studies of heat island circulations
Numerical studies of heat island circulations
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热岛环流的数值研究
DOI：
10.1007/bf00185740
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发表时间：
1970
影响因子：
4.3
通讯作者：
P. Taylor
中科院分区：
文献类型：
--
作者：
Y. Delage;P. Taylor
本文建立了一个二维模式，研究了无天气风时城市热岛引起的环流。边界条件需要仔细制定，由于这里出现的困难，我们限制我们的注意力的情况下，最初稳定的热分层。在最终对称双胞模式出现之前，允许从静止发展热岛环流，在某些情况下观察到过渡的多胞模式。研究了涡动输送系数、热岛强度、初始温度层结和热岛大小等参数对定常环流的影响。一些结果的情况下，在一个初始稳定的大气层下的差异表面冷却产生的环流和不稳定的层盖在城市的高架逆温。人们希望这种情况是模糊的夜间热岛没有地转风的代表。
A two dimensional model has been set up to investigate the circulation induced by an urban heat island in the absence of synoptic winds. The boundary conditions need to be formulated carefully and due to difficulties arising here, we restrict our attention to cases of initially stable thermal stratification. Heat island circulations are allowed to develop from rest and prior to the appearance of the final symmetric double cell pattern, a transitional multi-cell pattern is observed in some cases. The influence on the steady state circulation of various parameters is studied, among which are eddy transfer coefficients, the heat island intensity, the initial temperature stratification and the heat island size. Some results are presented for a case in which differential surface cooling beneath an initially stable atmosphere produces a circulation and an unstable layer capped by an elevated inversion over the city. It is hoped that this case is vaguely representative of the night-time heat island with no geostrophic wind.