物理学报Issue(21)：518-526,9.DOI:10.7498/aps.62.219201
飑线系统中的闪电辐射源分布特征及云内电荷结构讨论
Characteristics of lightning radiation source distribution and charge structure of squall line
摘要
Abstract
Lightning information indicates the intensity and the development of severe convection. The characteristics of lightning activity and charge structure of a squall line over Beijing on 13 June 2010 are analyzed by using the SAFIR3000 lightning detection data, Doppler weather radar and precipitation data. Results show that the lightning radiation sources are the major part in the convective leading region with a high reflectivity in front of the squall line, and the number of lightning radiation sources gradually increases in the back of stratiform region only at the dissipating stage. The correlation coefficient between the total lightning and convective precipitation is found to be 0.82, and that of intra-cloud lightning and convective precipitation is 0.76. It is inferred that the lightning is closely related to dynamical and microphysical processes of the squall line. According to the lightning radiation distribution, the charge structure of squall line is also discussed. At the mature stage of the squall line, the lightning radiation sources have two layers with the upper level centered at 11 km and the lower level at 6 km. Based on the bidirectional leader of lightning propagation and by assuming VHF source density maxima being most likely associated with the positive charge region, it is concluded that the squall line is characterized by a tripole charge structure with a middle charge region between the levels of 8 km and 10 km, and the two positive charge regions at the levels of 10 to 12 km and 4 to 7 km above the ground, respectively.关键词
飑线/闪电辐射源/电荷结构/SAFIR3000Key words
squall line/lightning radiation source/charge structure/SAFIR3000引用本文复制引用
刘冬霞,郄秀书,王志超,吴学珂,潘伦湘..飑线系统中的闪电辐射源分布特征及云内电荷结构讨论[J].物理学报,2013,(21):518-526,9.基金项目
国家自然科学基金重点项目(批准号:40930949)和国家自然科学基金青年基金(批准号:41105002)资助的课题.@@@@Project supported by the Key Program of the National Natural Science Foundation of China (Grant No.40930949), and the National Natural Science Youth Foundation of China (Grant No.41105002) （批准号:40930949）
