台风“莫兰蒂”结构变化对粤东风雨的影响分析

Analysis of the Impact of Typhoon Morandi Structure Change on the Wind and Rain in East Guangdong

利用广东、福建两省中尺度自动站观测资料,NCEP再分析资料(1°×1°)等,分析2016年第14号超强台风“莫兰蒂”结构变化对粤东的风雨影响,并初步探讨了“莫兰蒂”登陆厦门后强风暴雨主要位于台风东北侧的原因。结果发现:①台风“莫兰蒂”的结构不对称,其云系和强降水主要集中在台风中心及其东侧,从而造成粤东风雨偏弱;②“莫兰蒂”登陆后,粤东上空环境风切变弱,抑制了对流运动,同时粤东上空垂直上升速度和200 hPa散度也小,环流形势不利于粤东强降水的形成。

Use South China Mesoscale Automatic Station observation data,NCEP reanalysis data,etc.Analysis of the wind and rain impact of the No.14 super typhoon“Moranti”in 2016 on the east of Guangdong。And the reasons for the strong storms of Moranti after being landed in Xiamen are mainly located on the northeast side of the typhoon。The results of the study found that:①The structure of the typhoon“Morante”is asymmetrical,and its cloud system and heavy precipitation are mainly concentrated in the typhoon center and its east side,resulting in weak winds in eastern Guangdong.②After the“Morante”landed,the winds in the east of Guangdong Province weakened and suppressed the convective movement.At the same time,the vertical ascending velocity and 200hpa divergence in the east of Guangdong were also small,and the circulation situation was not conducive to the formation of strong precipitation in eastern Guangdong.