摘要
本文建立了一个双向相互作用套网格非静力平衡中尺度(β-γ)大气模式。模式采用Gal-Chen地形坐标系中的全方程作为基本动力框架,采用Klemp分裂时步法计算声波,并考虑了准弹近似。模式引入和改进了Deardorff整体边界层参数化和三种显式湿过程处理方案:暖云、雹云和雪云双参数微物理参数化。地面温度由地面薄层土壤的能量收支方程预报,并考虑了云和山坡走向对短波辐射的影响。该模式不仅为将来发展成能充分应用常规和高时空分辨率的非常规观测资料的中小尺度灾害性天气数值预报系统提供了基本模式框架,也可作为数百公里范围内大气现象和污染输送的模拟研究工具。
A three-dimensional elastic nonhydrostatic mesoscale (β-γ) model with nested-grid is developed. It uses a set of full equations in terrain-following coordinates as its basic dynamic frame, which is solved with a time-spliting algorithm for acoustic and gravity waves. The model physical parameterization includes a K-theory subgrid eddy mixing for cloud and free atmosphere, a bulk planetary boundary layer parameterization, and three sofisticated cloud microphysics schemes with double parameters for hail cloud, warm cloud, and snow cloud, respectively. The model is designed to be used flexibly for simulation of a variety of meso-and small-scale atmospheric processes, and can be improved as a regional and local operational NWP system in future.
出处
《气象学报》
CSCD
北大核心
1993年第3期369-380,共12页
Acta Meteorologica Sinica
基金
国家自然科学基金
关键词
大气过程
天气预报系统
大气模式
Mesoscale(β-γ) model, Meso- and small-scale atmospheric processes, Operational NWP system.
