摘要
Abstract
By using daily precipitation, conventional aerial and surface observation data, satellite cloud data, a diagnosis analysis was carried out on a regional rainstorm process during July 29 -31, 2011 occurred in liaoning. The results showed that: the process of precipitation, rainfall mainly occurs in the warm area, near 850 hPa shear. Low level strong water vapor convergence, the altitude of 300 hPa strong divergent wind form a strong " suction" ; subtropical high precipitation area of relatively stable, slow moving, causing the precipitation intensity, long duration, disaster. The process of water vapor source for the South China Sea on tropical cyclones in the amount of water vapor along the southerly wind transported to the Hetao areas east of the low voltage, the low pressure vapor along the South airflow transportation to Liaoning, Liaoning is located in the water vapor transport large shaft, with the vapor transport of large value axis eastward, Liaoning precipitation gradually end. 300 hPa flow field distribution in disperse shape, high level divergence in favor of power suction effect is enhanced, the secondary circulation enhancing, the low-level upward movement of the enhancement and maintenance. 500 hPa trough corresponding to the upper trough and shear line over 850 hPa corresponds to a scale is not large and more dispersive convective cloud cluster binding, in central Liaoning area stimulate strong precipitation cloud, leading to the area of rainstorm weather.关键词
暴雨/区域性/诊断分析/辽宁Key words
Rainstorm/ Regional/ Diagnosis analysis/ Liaoning分类
农业科技
