物理学报2009，Vol.58Issue(11)：8094-8106,13.
强降水过程中垂直螺旋度和散度通量及其拓展形式的诊断分析
Diagnosis of vertical helicity, divergence flux and their extensions in heavy-rainfall events
摘要
Abstract
On the basis of vertical helicity, we define three parameters, namely, the divergence flux, moisture vertical helicity and moisture divergence flux. The parameters axe calculated with NCEP/NCAR real analysis data in the two heavy-rainfall events occurring in China. The result shows that the parameters are closely related to the precipitation systems since they are capable of describing the typical vertical structure of dynamical and moisture fields. The anomalies of the parameters vertically integrated well correspond with the observed 6h-accumulated surface rainfall. This suggests that the parameters are capable of predicting and indicating the development and propagation of precipitation systems. The calculation with the 6-hour forecasting data of NCEP-GFS shows that the parameters have the ability of predicting precipitation and the moisture divergence flux is significantly beller than the other parameters in predicting precipitation.关键词
垂直螺旋度/散度通量/水汽垂直螺旋度/水汽散度通量Key words
vertical helicity/divergence flux/moisture vertical helicity/moisture divergence flux分类
天文与地球科学引用本文复制引用
冉令坤,楚艳丽..强降水过程中垂直螺旋度和散度通量及其拓展形式的诊断分析[J].物理学报,2009,58(11):8094-8106,13.基金项目
国家重点基础研究发展计划(批准号:2009CB421505),国家自然科学基金面上项目(批准号:40875032和40875002),国家科技部项目(批准号:GYH200706042)和IAP领域前沿项目(批准号:IAF07201)资助的课题.Project supported by the National Basic Research Program of China (Grants No. 2009CB421505), the National Natural Science Foundation of China (Grants Nos. 40875032 and 40875002) ,the Technology Project (Grants No. GYH200706042), and the Major Foreland Project of IAP (Grants No.IAP07201). （批准号:2009CB421505）
