大气科学2011，Vol.35Issue(2)：259-271,13.
南海季风爆发期间中尺度对流云带演变特征与持续性加强的机理研究
Studies of Evolution Features and Persistent Development Mechanism of Mesoscale Convective Clouds over the Northern South China Sea
摘要
Abstract
By using data of Precipitation Radar (PR) and Microwave Imager (TMI) sensors on the Tropical Rainfall Measuring Missions (TRMM), and intensive observational sounding data, the evolution characteristics and longlasting development mechanism of mesoscale convective clouds over the northern South China Sea (15°N- 25°N, 108°E- 122°E) in the South China Sea Monsoon Experiment (SCSMEX) are studied. The results show that the cold frontal cloud band from southern China coastal region started to weaken and dissipate as it entered the South China Sea before onset of the monsoon, and intensified and developed into deeper and long-lasting convective clouds with heavy precipitation after onset of the monsoon. The convective available potential energy (CAPE), wind shear and latent heat were found to play very important roles in maintaining and developing of the intense convective clouds. Before the monsoon onset, though the atmosphere over the northern South China Sea had higher CAPE, the wind shear was too weak, thus, the convective cloud band could not last longer. During the monsoon period, the monsoon circulation maintained the high CAPE and wind shear, and led to a long-lasting development of intense convective cloud system. The heating rate due to latent heat release also increased more than two times during the monsoon period, which provided the favorable condition for upward transportation of energy and water vapor from the ocean.关键词
中国南海季风试验(SCSMEX)/中尺度对流云/热带测雨卫星(TRMM)/结构与降水Key words
South China Sea Monsoon Experiment (SCSMEX)； mesoscale convective clouds, Tropical Rainfall Measuring Mission (TRMM)/structure and evolution分类
天文与地球科学引用本文复制引用
李香淑,郭学良,付丹红,杨保..南海季风爆发期间中尺度对流云带演变特征与持续性加强的机理研究[J].大气科学,2011,35(2):259-271,13.基金项目
国家自然科学基金资助项目40575003、41005072和国家科技支撑计划项目2006BAC12B03 （）
