安徽农业科学2011，Vol.39Issue(27)：16839-16842,4.
河南省中北部一次区域性暴雨天气诊断分析
Diagnostic Analysis on a Regional Rainstorm Weather in North-central Henan Province
孙仲毅 1李继华 2岳超1
作者信息
- 1. 河南省焦作市气象局,河南焦作454003
- 2. 河南省沁阳市气象局,河南沁阳464550
- 折叠
摘要
Abstract
[Objective] The research aimed to analyze a regional rainstorm weather process in north-central Henan Province. [ Method] Based on the conventional meteorological observation data and the rainfall data of Henan Meteorological Observatory, the atmospheric thermodynamics and dynamics diagnosis analysis on a rainstorm weather process in north-central Henan Province on July 19, 2010 was carried out. The charac teristics of physical quantity field and the evolution of weather situation in north-central Henan Province when the rainstorm happened were studied. [ Result] West Pacific subtropical high strengthened to extend westward. The dynamic lifting of low vortex at the middle and low lay ers and the strong water vapor transportation of southwest low-level jet caused the regional rainstorm weather process in north-central Henan Province. The diagnosis results of physical quantity showed that the deep moisture layer and the sustained water vapor convergence provided the plentiful water for rainstorm. The advection center of positive vorticity developed and spread from northwest to southeast, which was favora ble for the development of vertical movement. The structure maintenance of positive vorticity at the middle and low layers and negative vorticity at the middle-upper level provided the power condition for the rainstorm generation. The pumping and suction effect of convergence at the mid dle and low layers and divergence at the high layer was favorable for the strengthening of vertical ascending motion at the low layer. The lifting effect of dew point front at the middle and low layers triggered the release of unstable energy. The confrontation of warm and cold air currents was one of the important reasons for the regional rainstorm. TBB characteristic analysis showed that TBB was from - 60 to - 50 t in north central Henan Province in the whole strong precipitation time, and the moving speed was equal to that of southwest vortex. The low value belt of TBB corresponded with the rainstorm occurrence zone in Henan, and the minimum value center of TBB was basically consistent with the strongest centre of precipitation. [ Conclusion] The research provided the scientific basis for the short-term forecast of rainstorm.关键词
河南省中北部/区域性暴雨/天气过程/诊断分析Key words
North-central Henan Province/ Regional rainstorm/ Weather process/ Diagnostic analysis分类
天文与地球科学引用本文复制引用
孙仲毅,李继华,岳超..河南省中北部一次区域性暴雨天气诊断分析[J].安徽农业科学,2011,39(27):16839-16842,4.
