改进的Kuo-Type积云对流参数化方案  

A DIAGNOSTIC STUDY ON KUO-TYPE CUMULUS PARAMETERIZATION SCHEMES

作　　者：刘金良[1] 汪钟兴[1] 

机构地区：[1]中国气象科学研究院中尺度所,中国科学技术大学地球与空间科学系

出　　处：《热带气象学报》1994年第2期185-192,共8页Journal of Tropical Meteorology

摘　　要：通过对热力学方程和水汽方程两端作计算的对比，指出Ｋｕｏ－Ｔｙｐｅ参数化方案的一种改进型Ｋｒｉｓｈｎａｍｕｒｔｉ回归方案在长江中下游地区应用的不足之处，同时结合本地区的积层云共存及相互作用的事实，以实用性为目的，提出一种改进的Ｋｕｏ－Ｔｙｐｅ参数化方案。它具有以下特点：积云对流发生的判据具有区域特点；采用Ｋｒｉｓｈｎａｍｕｒｔｉ的具有明确物理意义的对流参数，但不从统计回归中求得，而是直接由“实时资料”求得，且仍保持着Ｋｕｏ－Ｔｙｐｅ方案的简单易行性；在不引入任何微物理方程的情况下，从物理意义上考虑这些过程，从而把积云尺度对流（积、层云相互作用）引入参数化中。计算结果表明，这种改进方案，在诊断分析中有明显的优点。Comparing the computation made by the thermodynamic and hydrologic equations. it is known that an improved Kuo-type Krishnamurti regression scheme is an insufficient application for the mid-and-lower reaches of the Yangtze River Valley. An improved Kuo type parameterization scheme, therefore, is designed in view of the fact that the local cumulus and stratiform clouds interact in coexistence. It is characterized by 1) the criteria for the generation of cumulus convection is regional; 2) Krishnamurti's convective parameters, which are strongly physically significant are obtained directly from realtime data rather than statistic regression, in addition to the easy applicability seen in the Kuo-type; and 3) the processes are considered physically to incorporate cumulu-scale convection (interaction between cumulus and stratiform clouds) into the parameters without the presence of any microphysical equations. The computation shows that the improved scheme has great positive effects on diagnostic analyses.

关 键 词：积云 参数化 热量 水汽收支 暴雨预报模式 

分 类 号：P426.5[天文地球—大气科学及气象学] P457.6