气象与环境学报2012，Vol.28Issue(6)：19-24,6.
天山北坡中部一次罕见局地强降水中小尺度系统分析
Analysis of meso-micro scale system characteristics in a rare heavy rain on the northern slope of Tianshan Mountain
摘要
Abstract
Abstract:Based on the Doppler radar products and T639 reanalysis data, small-scale system characteristics of a rare heavy rain on June 22,2010 in the south of Shihezi and its occurrence time as well as falling area were ana- lyzed. The results show that mesoscale short wave split from cold low-pressure from Siberia to Lake Balkhash is the direct influencing system of this process. The middle scale shear line from low level to ground and convergence line as well as cold front are the trigger mechanism for the local heavy rain. There is the transportation of strong southwest and southeast warm-wet air flow and their strong convergence in front of the mountain near low level, which provides the effective moisture and unstable energy for this process. Multiple-γ convective cells roll and change along the special topography, which are the direct reasons forming failing areas of the local strong rain. The occurrence of meso-cyclone is indicative to the heavy rain. The heavy precipitation occurs in the superposition are- as where the echo intensity is more than 50 dBz, the echo top height exceeds 5 km, vertical accumulated liquid wa- ter content is above 45 kg·m^-2 and it exists in the mesocyclone. It is in advance about 20 rain for warning of short- time strong precipitation using mesocyclone.关键词
局地强降水/中小尺度系统/中气旋Key words
Local heavy precipitation/Meso-small scale system/Mesocyclone分类
天文与地球科学引用本文复制引用
赵俊荣..天山北坡中部一次罕见局地强降水中小尺度系统分析[J].气象与环境学报,2012,28(6):19-24,6.基金项目
中国沙漠气象科学研究基金项目（sqj2010013）资助. （）
