摘要
本文建立一个三维非静力边界层模式对杭州湾附近复杂地形域区进行了数值模拟。模式采用常用的能量闭合和一种新的非局地反梯度闭合方案，结合实测资料，以验证不同闭合方案模拟实际大气的能力，进一步分析三维边界层模式的效能。结果表明，两种闭合方案都能较好地模拟海陆环流及温度场，而反梯度闭合比能量闭合更能细致、敏感的模拟湍流场随地形的变化，且模拟结果与实测更接近。
In this paper,a 3-dimensional non-hydrostatic PBL model has been developed and used for numerical simulation in the complex terrain,near Hang Zhou gulf. In order to test the validity of the different closure scheme simulating atmosphere and analyse the ability of the 3-dimension model,a turbulent kinematic energy (TKE)closure and a new non-local counter gradient (CG)closure were applied to the model,combining with observed data. It is shown that by using the two closure metheds one can obtain good results for the simulation of wind and temperature fields in coastal areas. The result obtained by CG closure scheme can reflect the variation of turbulent fields with terrain more sensitively and finely than that by TKE closure. Moreover, the former is closer to the observation than later.
出处
《气象科学》
CSCD
北大核心
2000年第2期150-160,共11页
Journal of the Meteorological Sciences
关键词
海岸边界层模式
三维非静力模式
湍流
能量闭合
Structure of boundary-layer in coast areas
3-D nonhydrostatic model
Nonlocal counter gradient closure
Tubulent kinematic
Energy closure
