摘要
对2010年1月21～23日广东清远地区的连续性暴雨过程进行了诊断分析,结果表明,这次连续性暴雨过程是在副高强度强、位置稳定,南支槽活跃,低层冷暖气团在南岭附近长时间对峙的有利形势下产生的。过程前期水汽源于孟加拉湾和南海,后期以孟加拉湾为主,清远北部水汽辐合更明显。过程前期能量锋区较强,后期不稳定能量减弱。暴雨中心出现在垂直上升运动中心附近,次级环流圈使水汽被源源不断地抽吸到清远北部。红外云图上云雨带与水汽辐合带一致,过程前期云顶亮温高,中尺度对流云团发展旺盛,雨强较大,21日夜间后,云顶亮温上升,雨强减弱。
Diagnosis analysis of the continuous rainstorm processes in Qingyuan Guangdong was made on January 21 st- 23rd of 2010. The results showed that he continuous rainstorm processes took place under the beneficial situations of strong subtropical high strength and stable posi- tion, the active Southern Branch Trough, cold warm air mass confrontation for a long time near Nanling Mountains in the low layer. Water va- por eame from Bengal Bay and south china sea in the prophase of processes, in the anaphase of processes Bengal Bay was main, water vapor convergenee was more obvious in northern Qingyuan. In the prophase of processes, energy frontal zone was stronger, unsteady energy was weaken in the anaphase of processes. The rainstorm center appeared at near the center of vertical rising actions, the second-class circulation cell made water vapor constantly and constantly absorb to northern Qingyuan. On satellite image （IR）, the eloud band corresponded with water vapor convergence, in the prophase of processes cloud top brightness temperature was high, mesoseale convective clusters prosperously devel- oped, rain intensity was more heavy, after the nighttime of January 2st, cloud top brightness temperature ascended, rain intensity was weaken.
出处
《安徽农业科学》
CAS
北大核心
2010年第28期15738-15742,共5页
Journal of Anhui Agricultural Sciences
关键词
天气学
连续性暴雨
诊断分析
清远
Synoptic meteorology
Continuous rainstorm
Diagnosis analysis
Qingyuan
