气象科学2011，Vol.31Issue(1)：61-66,6.
"0808"号台风残留引发特大暴雨成因分析
Mechanism analysis of torrential rain initiated by residual circulation of typhoon Phoenix (0808)
摘要
Abstract
The torrential rain in Chuzhou on 1 August 2008 was analysed based on the NCEP 1 × 1 reanalysed data , TBB and Doppler radar data. The results showed that this heavy rainstorm process was composed of two periods of heavy rainfalls. It occurred on the background of weakening typhoon ( Phoenix) circulation combined with enhancement of the West Pacific subtropical high. It was triggered separately by accretion of the southwest LLJ and the pressure trough degraded from typhoon circulation. It was caused by four MCSs. Heavy rainfall appeared in the maximal TBB gradient area of newly emerging MCS.Analysis of physical quantity and evolvement of the radar echoes showed that the interaction of the strongest moisture convergence in low-troposphere and inrush of dry cold air at middle levels was the physical mechanism of the heavy rain. The second stage of strong rainfall was caused mainly by shear line and adverse wind area appeared on Doppler base velocity and mesoscale vortex at 500hPa level.关键词
台风/暴雨/MCS/滤波/物理机制Key words
Typhoon/ Torrential rain/ MCS/ Filtering/ Physical mechanism分类
天文与地球科学引用本文复制引用
谢义明,胡玉玲,沙维茹,朱建国,杨柳.."0808"号台风残留引发特大暴雨成因分析[J].气象科学,2011,31(1):61-66,6.基金项目
国家自然科学基金资助项目(30771272),江苏省气象局青年基金项目(200901) （30771272）
