影响华南西部的中层气旋

ON THE MIDTROPOSPHERIC CYCLONES INFLUENCING THE WESTERN PART OF SOUTH CHINA

中文摘要:

      中层气旋是发生在对流层中层的低纬系统.国内外曾有过一些研究.我国梁必骐等对1960-1981年发生在南海地区700hPa层上的中层气旋研究后指出:该地区的中层气旋主要发生在暖季,它对我国南方地区天气影响不可低估.本文用1976-1986年4-9月中央气象台逐日历史天气图资料.

英文摘要:

      According to the daily synoptic charts of April to September for the period 1976-1986, the fundmental characters, the formation and the ways by which the effects can take place on the weather of the western part of south China of the midtropospheric cyclones over the area between 10°N and 30°N,100°E and 130°E are studied in this paper.Moreover,based on the data for 07h of Monthly Aerological Bulletin of China for the same period,fifteen influential midtropospheric cyclones whose centers are in south China or the offshore area are selected for studying.Expecially,the structure of the midtropospherie cyclones which have an effect on the western part of south China are investigated systematically by composite method.Finally,the key points to determine whether the midtroposphric cyclones influence the western part of south China are proposed.