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利用NCEP资料分析2016年洞庭湖区岳阳3次暴雨过程

作  者:
袁泉;方庆艳;陈姣荣
关键词:
NCEP;暴雨;分析
摘  要:
利用NCEP再分析物理量场资料,对2016年4月19-21日、5月8-10日、7月1-5日岳阳3次暴雨过程进行了分析.结果表明,3次过程水汽辐合层次低,中心辐合强烈,是典型的热带海洋型降水.降水最强烈时段既是上升运动的最强时段,也就是低层强烈辐合和高层强烈幅散的时段,低层的辐合上升和高空的辐散有利于上升运动的发展加强,为暴雨发生提供了良好的动力条件.强烈的垂直上升运动可将能量向上传播,θse和位势稳定度的分布可以指示强降水发生的时间和区域.
作  者:
YUAN Quan;Yueyang Meteorological Bureau;
单  位:
YUAN Quan%Yueyang Meteorological Bureau
关键词:
NCEP;;Brainstorm;;Analysis
摘  要:
By using the NCEP reanalysis data, the three brainstorms processes which happened on April 19 th-21 st、May8 th-10 th and July 1 st-5 th were analyzed.The results showed that these processes were typical Marine precipitation, as the level of water vapor convergences was low and the center convergence was intensively.The most intensive time of raining was the most strong time of upward motion, also was the time of low level of strong convergence and the high level of strong divergence. The upward of low level convergence and high level divergence was benefit for the development and strengthen of upward motion,which was provide a good dynamic condition for the brainstorm. The strong vertical upward motion could make the energy propagating upward. The distribution of θse and the potential stability could indicate the happening time and district of strong raining

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