气象学报Issue(6)：1035-1046,12.DOI:10.11676/qxxb2013.094
线状中尺度对流系统内多个强降水单体的结构演变及闪电活动特征
摘要
Abstract
The data from the Doppler radar,SAFIR3000 lightning location system and high-density automatic meteorological stations observations are used to design a variety of radar quantitative parameters and analyze the evolution of cells structures, the lightning activity and electrical vertical structure of the severe rainfall cells structure in a Leading Line Meso-scale Convec-tive System (LL-MCS).The relationship between convective cells andβ-mesoscale LL-MCS is revealed.The conclusions are as follows.At first,the four cells (Gu’an in Hebei,Shunyi and Fangshan in Beijing,Baodi in Tianjin)in the single squall respec-tively brought rainfalls of about 23 mm,50 mm,27 mm and 70 mm in one hour.In the Fangshan cell,two smaller monomers were merged.The cell of Shunyi was followed by the other cell.In the Gu’an and Baodi cell,their development is related to LL-MCS by feeding and swallowing.Secondly,V40 (40 dBz echo volume range),V40UP-6 (40 dBz echo volume above the height of 6 km),SET11 (echo area range at 11 km level)could describe the 3D quantitative structure change of a cell,and Fcg(CG light-ning frequency)and Fic (IC flash frequency)were closely related to the radar parameters,such as its correlation coefficient with V40UP-6 being between 0.63 and 0.97.The flash frequency of IC was more sensitive than CG to echo structure change.Thirdly, the height of the radiant point maximum concentration area in the Gu’an cell was below 6 km,which was far lower than the other cells at the same stage.At last,the feature of lightning frequency of CG and lightning frequency of IC increased with the main positive charge area significantly lifted after the merger of convective cells,and the characteristics of the lightning frequen-cy increase showing relationship with the rainfall intensity increasing as well as the lightning frequency peak leading the maxi-mum of rainfall intensity have positive significance for warning of disaster weather.关键词
线状中尺度对流系统/γ中尺度对流单体/结构演变/雷达参量/闪电活动Key words
LL-MCS/γ-mesoscale convective cell/Structure evolution/Radar parameter/Lightning activity分类
天文与地球科学引用本文复制引用
易笑园,张义军,王红艳,董昊,张楠,徐姝..线状中尺度对流系统内多个强降水单体的结构演变及闪电活动特征[J].气象学报,2013,(6):1035-1046,12.基金项目
资助课题公益性行业（气象）专项（GYHY201006005）、国家自然科学基金（41275044、41030960）、灾害天气国家重点实验室开放课题（2013LASW-09）、中国气象局预报员专项（CMATG2009YB04）。 （）
