一种简单的对流边界层参数化方法

A SIMPLE METHOD OF PARAMETERIZATION OF CONVECTIVE BOUNDARY LAYER

本文在山西神头地区1984—1989年多次大规模野外测试资料的基础上,对试验区大气边界层气象和湍流特征进行分析,提出一种简单的对流边界层参数化方法。本参数化方法综合利用了对气边界层各种半经验理论和实验结果,在不影响要求精度的前提下,把对对流边界层湍流结构和平均场的探测减少到最小程度。实测检验表明,本方法预测精度较高,绝大部分误差为10～30％是一种估算对流边界层主要气象参数的简单实用、准确有效的方法。

Based on Shentou Field Experments (1984-1989) and analysis of turbulent structure of the conveetive atmospheric boundary layer (ABL), a method of parameterization of conveetive ABL is obtained. According to the method, through a judicious use of simple measurements that are routine taken,it is realizable to estimate the more complex and detailed meteorological parameters required by the models of atmospheric dispersion and the researches on air pollution. The purpose of this analysis,therefore, is to draw together various semi-empirical theories of the conveetive ABL, using these, along with readily available measurements, we demons' trate the accuracy with which one can deduce the mean and turbulent structure of the conveetive ABL.