复杂下垫面模拟域大气边界层非局地闭合模拟研究

在非局地闭合大气边界层模拟研究基础上，选取黑河实验研究资料（HEIFE），利用二维模式对绿洲和沙漠交界地区的内边界层结构进行了模拟研究，模式考虑了两种下垫面条件下动力、热力特性的不同，并加入了湿度及水汽通量的预报。模拟结果表明:二维非局地闭合模式能得到合理的TIBL结构的基本特征，包括平均场、湍流场等，并能模拟给出一些由下垫面特性形成的大气现象，如沙漠地区逆湿现象的生消过程、绿洲的冷岛效应、绿洲与沙漠因热力差异而形成的局部环流形势等细致结构，符合沙漠站白天观测事实的典型特征。

Simulation Research for PBL using Non-Local Closure over Complex Underlying Surface Domain

A new closure method based on the transilient turbulence theory developed by Stull is studied, and the results show that the transilient turbulence theory is proper and may have broader applications to atmospheric boundary layer modeling and other models Based on the transilient turbulent theory a non-local closure 2-D model was conducted to simulate the atmospheric advection between oasis and sand and the results show that the model can be successful to simulate oasis-sand region thermal internal boundary layer such as moisture inversion, oasis cold island effect