2012年6月中旬河南持续性高温天气成因分析

利用常规气象观测资料、高空资料以及NCEP 1°×1°6 h分析资料,对2012年6月中旬河南省持续性高温天气进行分析.结果表明:1这次河南地区持续的高温天气是在稳定的大气层结下,高层受强西北气流控制,中低层层有强而持久的暖中心与之配合产生的;2地面场上河南省处于南高北低的气压场,有利于偏南风向北输送暖空气,促进该地区高温天气的形成;3从物理量上看,中低层暖平流对地面增温、辐散下沉、绝热增温以及干燥的水汽条件都是促进此次高温天气过程的重要因素.

The Analysis of Sustained Hot Weather in Henan in Mid-June 2012

By using of conventional observation data,altitude information and the NCEP 1° ×1° 6 hour data,the caseof sustained hot temperatures weather in Henan in mid-June 2012 is analyzed. The results showed as follows：（1）Onthe basis of the stable atmospheric stratification,the sustained hot temperatures weather in Henan is controlled bythe strong northwest flow in high altitude,with a strong and long-lasting warm center in low layers. （2）On the groundfield,Henan Province is in the pressure field whose south higher than the north,and the southerly winds is conduciveto transport warm air to northward,promoting hot temperatures weather in the Henan region formed. （3）From the view ofphysical quantities,the warm advection of the middle and lower forcing the ground temperature increasing,divergencesinking,adiabatic warming and the dry moisture conditions are all important factors for promoting the process of hottemperatures weather.