2015年8月30日河南省中部地区一次飑线过程分析
Analysis of a Squall Line Process in Central Henan Province in August 30,2015
周丹丹 1魏鸣2
作者信息
- 1. 南京信息工程大学大气物理学院,江苏南京210044;河南省许昌市气象局,河南许昌461000
- 2. 南京信息工程大学大气物理学院,江苏南京210044
- 折叠
摘要
选取2015年8月30日在东北冷涡影响下发生在河南省中部地区的一次飑线天气过程,运用风矢-位温图、新一代高分辨率天气雷达资料及卫星云图资料,分析此次过程产生的环流背景、大气结构特点,寻找飑线的预报及预警切入点.结果表明,此次天气过程是东北冷涡后部横槽影响下产生;风矢-位温图上强飑线出现前提前12 h以上出现超低温、顺滚流、高层强劲西风、“蜂腰”状结构分布;根据卫星云图演变特征可提前1h左右对强对流天气做出预警;根据雷达云图演变可提前30 rmin以上对各类强天气做出预警.
Abstract
A squall line process in central Henan Province in August 30,2015 was selected,which was affected by the northeast cold vortex.Wind vector-potential temperature,a new generation of weather radar high resolution data and satellite cloud image data were used to analyze the background of atmospheric circulation and the characteristics of atmospheric structure,so as to find the forecast of squall line and to alert the entry point.Results showed that this whether process was produced under the influence of the northeast cold vortex.Ultra-low temperature at the toptroposphere,the clockwise tumble flow,a structure like "bee waist" of wind distribution and strong westerly wind could be observed more than 12 hours in atmospheric energy structure images before the squall line occurred.According to the characteristics of the development of the clouds on satellite images,forecasting and warning of severe convective weather could be made about 1 hour early.According to the evolution of radar images,warning of the strong weather could be made half an hour early.
关键词
飑线/东北冷涡/卫星云图/大气能量结构V-3θ/多普勒天气雷达Key words
Squall line/Northeast cold vortex/Satellite image/Atmospheric energy structure V-3θ/Doppler radar引用本文复制引用
基金项目
许昌市科技发展计划项目(140201022)
河南省科学技术厅课题(122102310583)
许昌市气象局课题(XQ201206)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据