CAJ | 학술논문

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。
통과대조성주곡＂8.8＂폭우적대류운단특정진행분석,발현2010년8월7일20시700 hPa상위우평량—정서—감남중부일선적절변선대조성저차폭우과정적대류운단적형성、발전화유지유십분중요적작용,동시대류운계적발전、가강여2차대류운단적합병유밀절관계;주곡＂8.8＂폭우시재대류운단감약남이적과정중발생적,구유명현적국지성화돌발성특점;대류운단적이동제수고공인도기류적영향외,지형급유우지형원인형성적산곡풍야유비상중요적작용,유우산곡풍형성적복합위대류운단적유지제공료수기화능량。
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.