摘要
本文在地形坐标系中建立了一个准静力平衡的三维大气-土壤耦合模式,模式中大气、土壤的耦合通过山地的能量平衡方程来实现,其中考虑了坡地对日照以及日出日没时角的影响。为了增加模式的稳定性,上边界采用了海绵边界条件,侧边界输入端采用了海绵辐射边界条件,输出端采用辐射边界条件。为了提高模拟精度,模式中还采用了静力扣除法。 用本模式对南京方山小气候进行模拟,各坡向的地表温度、1.5m高空气温度模拟结果与观测值吻合良好。此外,还对方山进行了阻塞、冷迳流、山谷环流现象的一系列数值试验,得出了一些有意义的结论。
Presented in this paper is a 3-dimensional air-soil coupling model in which the assumption of static equilibrium is applied, where the air and soil are related through the mountain energy balance equation and that the effect of slope on sunshine and sunrise-sunset hour angles is taken into account. To promote model stability, sponge boundary condition and radiative boundary condition are adopted. Static deductive method is used to increase the model accuracy, too. The model is used to simulate the microclimate in Fangshan. The model result of the surface temperature and the air temperature of 1.5m height fit into the observed data very well. Moreover, the model is also used to simulate blocking, drainage flow, mountain and valley breeze, etc. And the several significance conclusions are obtained.
出处
《气象学报》
CSCD
北大核心
1992年第4期478-484,共7页
Acta Meteorologica Sinica
