| 2007年红河州一次典型两高辐合区强降水过程分析 |
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| 引用本文： | 周秀美,兰兰,侬耀辉.2007年红河州一次典型两高辐合区强降水过程分析[J].云南地理环境研究,2007(Z1). |
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| 作者姓名： | 周秀美 兰兰 侬耀辉 |
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| 作者单位： | [1]红河州气象局 [2]红河州气象局 云南蒙自 [3]云南蒙自 |
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| 摘 要： | 2007年7月,红河州多受两高间辐合区影响,产生强降水,选取7月18～20日强降水过程进行分析,得出:单纯的两高辐合区并不一定能产生强降水。虽然此次过程中有深厚的西南涡从四川东南移,但强降水的触发机制并不是西南涡,而是高空冷平流,且高空冷平流具有高层强、低层弱的特点。水汽、能量条件表现出在高层随着环流背景场南移、中低层少变的特点,较强的上升运动也集中在对流层中上层。MM5对于此次过程较强降水发生的时间、区域有较好的预报能力,但降水量级偏小。
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| 关 键 词： | 两高辐合区 冷平流 西南涡 |
A TYPICAL HEAVY RAINFALL EVENT WHICH CAUSED BY THE CONVERGENCE BETWEEN TWO HIGHTS IN HONGHE PREFECTURE IN 2007 |
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| Institution: | ZHOU Xiu-mei; LAN Lan; NONG Yao-hui(The Meteorological Bureau of Honghe Prefecture; Mengzi 661100; Yunnan; China); |
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| Abstract: | During July,2007,the Honghe area of Yunnan was ofen suffered from the heavy rainfall,which usually caused by the Convergence between two Hights(CBH).A case of heavy rainfall from July 18 to 20 has been selected and studied in this paper.The results show that(1) the heavy rainfall may not be caused by the CBH only;(2) it is the cold advection at high lever that results in the precipitation,though there was a Southwest Vortex moving southwards from Sichuan during the process. |
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| Keywords: | convergence between two hights cold advection southwest vortex |
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