Lightning and Doppler radar observations of a squall line system
Lightning and Doppler radar observations of a squall line system
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飑线系统的闪电和多普勒雷达观测
DOI：
10.1016/j.atmosres.2008.05.015
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发表时间：
2009-02
影响因子：
5.5
通讯作者：
Wang Jun
中科院分区：
文献类型：
--
作者：
Gong Dianli;Feng Guili;Qie Xiushu;Wang Jun
2006年4月28日，山东省发生了一次典型的强雹暴过程，造成了巨大的经济损失。利用地面云地闪定位网、多普勒雷达和TRMM卫星上的闪电成像传感器的观测资料，对这次飑线过程中的云地闪特征进行了详细的研究。结果表明，正地闪占总地闪的54.7%。在初始发展阶段，CG闪光速率低于0.5fl min− 1，且大多数CG闪光为正。随着飑线的快速发展，它显著增加，沿着达到4.5 fl min− 1，在此期间正CG的百分比超过75%。在成熟期和消散期，地闪率开始下降，但负地闪所占比例逐渐增加，并超过正地闪所占比例。正的CG闪光倾向于出现在右侧，而负的CG闪光倾向于出现在左侧。地面强风发生在正地闪密集区或其附近。几乎所有的正地闪都发生在强雷达回波区附近，在飑线的前部。然而，负地闪几乎只发生在雷达回波较弱和均匀的区域。风暴中的总闪光频率非常高，高达136 fl min− 1，云内闪光与CG闪光的比例为35：1。密集的正地闪对应于上升气流区，它们不是出现在上升气流的核心，而是出现在主上升气流的后面和附近。3 ~ 6 km的后部入流急流对地面弓形回波和极强风的形成起着重要作用。飑线中的CG分布特征明显不同于一般MCS。电荷结构可以粗略地描述为反向电荷结构。
A typical squall line with damaging wind and hailstones occurred on 28 April 2006 in Shandong Province, middle eastern China, and caused great economic loss. The characteristics of cloud-to-ground lightning (CG) in the squall line were studied in detail by combining the data from the ground-based CG location network, two Doppler radars and the Lightning Imaging Sensor on the TRMM satellite. Results show that positive CG flashes accounted for 54.7% of the total CG flashes. During the initial developing stage, the CG flash rate was lower than 0.5fl min− 1and most of the CG flashes were positive. It increased significantly, up to 4.5fl min− 1, along with the rapid development of the squall line, and the percentage of positive CG was more than 75% during this period. The CG flash rate began to decrease but the percentage of negative CG flash increased gradually and exceeded that of positive CG during the mature and dissipating stages. Positive CG flashes tended to occur on the right flank and negative ones on the left flank. Strong wind at the surface occurred in or near the regions with dense positive CG flashes. Almost all positive CG flashes occurred near the strong radar echo regions, in the front parts of the squall line. However, the negative CG flashes almost exclusively occurred in the regions with weak and uniform radar echoes. The total flash rate in the storm was very high, up to 136fl min− 1, and its ratio of intracloud flashes (IC) to CG flashes was 35:1. Dense positive CG flashes corresponded to updraft regions, they did not occur in the core of the updraft, but just behind and close to the main updraft instead. The rear inflow jet, between 3 and 6 km, played an important role in the formation of the bow echo and very strong wind at surface. The CG distribution features in the squall line were obviously different from that of an ordinary MCS. The charge structure could be roughly described as an inverted charge structure.
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影响因子：
5.2
作者：
R. Thomas;P. Krehbiel;W. Rison;T. Hamlin;D. Boccippio;S. Goodman;H. Christian
通讯作者：
R. Thomas;P. Krehbiel;W. Rison;T. Hamlin;D. Boccippio;S. Goodman;H. Christian
影响因子：
5.5
作者：
J. F. Correoso;E. Hernández;R. Garcia-Herrera;D. Barriopedro;D. Paredes
通讯作者：
J. F. Correoso;E. Hernández;R. Garcia-Herrera;D. Barriopedro;D. Paredes
影响因子：
3.2
作者：
L. Lemon
通讯作者：
L. Lemon
影响因子：
3.1
作者：
W. Gallus;Richard H. Johnson
通讯作者：
W. Gallus;Richard H. Johnson
影响因子：
2.2
作者：
Hai-Tien Lee;R. Ellingson
通讯作者：
Hai-Tien Lee;R. Ellingson