近年来我国暴雨中尺度动力分析研究进展

Advances in Meso-Scale Dynamical Analysis of Torrential Rain Systems in Recent Years in China

总结了近十年以来中国气象科研人员在暴雨中尺度动力分析研究领域的主要研究成果,从大尺度环流背景与中小尺度系统的相互作用、高低空急流、低涡、位涡与对流涡度矢量、螺旋度、不稳定等方面对它们进行了分类概括。对暴雨中尺度动力分析研究的回顾表明,以往常用的数值模拟、能量转换收支分析、涡度、散度、涡度收支、涡度平流、温度平流、各种不稳定指数等的诊断仍然是暴雨中尺度动力分析的主要手段,但是,近年来,除了位涡、螺旋度等动力变量在暴雨中尺度动力分析中的广泛应用以外,一些新的物理量,如非均匀饱和广义湿位涡、对流涡度矢量以及有限区域风场分解方法在暴雨中尺度动力分析中也得到了更多的应用。

The main study results on torrential rain and meso-scale dynamical analysis in recent years are summarized, which include large scale circulation, the interaction between the large scale and meso-micro scale systems, upper and low level jet, vortex, potential vorticity and convective vorticity vector, helicity and instability, etc. The review on meso-scale dynamical analysis of torrential rain systems manifests that the numerical simulation, transform and budget of energy, vorticity, divergence, vorticity budget, vorticity advection, temperature advection, various instability indexes, etc., are still the general variables for diagnosing the meso-scale systems. But in recent years, besides the potential vorticity and the helicity are used more effectively than before, some new variables, such as generalized moist potential vorticity in non-uniformly saturated atmosphere, convective vorticity vector, and wind partitioning method in a limited region, are applied more to the meso-scale dynamical analysis of torrential rain systems.