J4 ›› 2011, Vol. 29 ›› Issue (4): 466-471.

• 论文 • 上一篇    下一篇

舟曲“8. 8”暴雨云团的中尺度特征

王建兵1 ,杨建才2汪治桂1   

  1. 1. 甘肃省甘南州气象局,甘肃合作747000; 2. 兰州中心气象台,甘肃兰州730020.
  • 收稿日期:2011-09-05 修回日期:2011-11-07 出版日期:2011-12-31 发布日期:2011-12-31
  • 作者简介:王建兵( 1968 - ) ,男,汉族,甘肃甘谷人,高级工程师,主要从事天气、气候研究. E - mail: wargib gn@163. com.
  • 基金资助:

     中国气象局预报员专项“舟曲“8. 8”短时强降水分析”及甘肃省气象局“甘南高原对流云的研究”课题资助

Meso - scale Characteristics of the Convective Cloud in“8. 8”Heavy Rain Occurred at Zhouqu County

WANG Jianbing1,YANG Jiancai2,WANG Zhigui1   

  1.  1. Gannan Meteorological Bureau of Gansu Province,Hezuo 747000,China;
    2. Lanzhou Central Meteorological Observatory,Lanzhou 730020,China.
  • Received:2011-09-05 Revised:2011-11-07 Online:2011-12-31 Published:2011-12-31

摘要:

通过对造成舟曲“8. 8”暴雨的对流云团特征进行分析,发现2010 年8 月7 日20 时700 hPa上位于平凉—定西—甘南中部一线的切变线对造成这次暴雨过程的对流云团的形成、发展和维持有十分重要的作用,同时对流云系的发展、加强与2 次对流云团的合并有密切关系; 舟曲“8. 8”暴雨是在对流云团减弱南移的过程中发生的,具有明显的局地性和突发性特点; 对流云团的移动除受高空引导气流的影响外,地形及由于地形原因形成的山谷风也有非常重要的作用,由于山谷风形成的辐合为对流云团的维持提供了水汽和能量。

关键词: 对流云团, 暴雨, 中尺度, 特征

Abstract:

The characteristics of the convective cloud in“8. 8”heavy rain process was analyzed in this paper. Results show that the shear line on the upper air chart of 700 hPa located in the middle of Gansu Province played an important role in the convective cloud’ s formation,development and maintenance,and at the same time,the two time coalition of convective cloud had a very close relationship for the convective cloud’s development. The heavy rain occurred in the process of convective cloud subsiding and moving southward,the heavy rain showed an obvious regional and abrupt characters. The moving path of the convective cloud was effected by the steering flow,topography and mountain and valley winds. The convergence resulted by the mountain and valley winds supplied the water vapour and energy to the maintenance of the convective cloud.

Key words:  convective cloud, heavy rain, meso - scale, characteristics