AN ANALYSIS OF THE SYNOPTIC PROCESSES DURING THE EASTWARD MOVEMENT OF TROUGHS IN THE SOUTHERN BRANCH OF THE UPPER WESTERLIES ABOVE A CUSHION OF COLD AIR OVER SOUTH CHINA IN SPRING.
EMMANUEL COLL BOSTON MASS ORIENTAL SCIENCE LIBRARY
Pagination or Media Count:
After the intrusion of cold air into South China in spring a thin layer of cold air often prevails over the east of the Tibetan Plateau, forming a cushion of cold air. When zonal circulation dominates the upper troposphere, troughs over the cold cushion tend to move eastward along the southern branch of the upper westerly jet. Under such circumstances, the high pressure area at the surface tends to break up to make way for frontogenesis and the development of surface troughs. The present study deals with such synoptic processes over South China for the months of March to May during 1958 - 1962. Problems on short-range prediction of precipitation and thunderstorm activities associated with these processes are also discussed. Author