气象科学2011，Vol.31Issue(3)：347-353,7.
一次特大暴雨过程的多普勒天气雷达资料分析
Analysis on Doppler weather radar data of an extraordinarily heavy rainfall
摘要
Abstract
Based on the satellite cloud picture and Doppler weather radar data, the extraordinarily heavy rainfall from 1 August to 2 August, 2008 occurred in southeast of Anhui province and southwest of Jiangsu province was analyzed. The results show that the rainstorm was caused by re-intensified depression as the result of landfall of typhoon. There was severely convergent ascending motion and southwest low-level jet over rainstorm area. The cold air-mass which was intruded into middle troposphere triggered the instability energy. The severely heavy rainfall correlated with several times' developments and long standing maintenance of the meso-β scale MCS. Both the lowest cloud field luminance temperature and the area of meso scale cloud cluster decided the rainstorm intensity. And the area of the temperature below - 73 ℃ of cold cloud cluster correlated with rainstorm area very well. Several convection cells inside the cumulus-stratus mixed echo passed through rainstorm area in turn and brought about "train effect"and led to a sustained rainstorm. During heavy rainfall stage, the thickness of convergence in middle and low troposphere increased and intensity reinforced. The divergence in upper troposphere was weak. Descending motion prevailed in low troposphere( below 2 km) and ascending motion was above 2 km.关键词
特大暴雨/低空急流/多普勒天气雷达Key words
Severe heavy rainfall/ Low-level jet/ Doppler weather radar分类
天文与地球科学引用本文复制引用
蒋义芳,尹东屏,刘安宁,李进喜,吴海英..一次特大暴雨过程的多普勒天气雷达资料分析[J].气象科学,2011,31(3):347-353,7.基金项目
江苏省气象科研开放基金项目(200910) （200910）
中国气象局气象新技术推广项目预报员专项(CMATG2009YB12) （CMATG2009YB12）
