Difference in the lightning frequency between the July 2018 heavy rainfall event over central Japan and the 2017 northern Kyushu heavy rainfall event in Japan
Difference in the lightning frequency between the July 2018 heavy rainfall event over central Japan and the 2017 northern Kyushu heavy rainfall event in Japan
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2018年7月日本中部强降雨事件与2017年日本九州北部强降雨事件闪电频率差异
DOI：
10.1002/asl.1067
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发表时间：
2021
影响因子：
3
通讯作者：
Hashimoto Akihiro
中科院分区：
文献类型：
--
作者：
Sato Yousuke;Hayashi Syugo;Hashimoto Akihiro
使用数值模型与显式大闪电模型相结合，研究了两次强降雨事件（2017 年九州北部强降雨事件和 2018 年日本中部强降雨事件）之间闪电频率差异的原因。 7月这些强降雨事件发生在日本白宇锋系统附近，但降雨特征有所不同。前一案例被前期卫星观测研究归类为极端降雨和极端对流事件，且闪电频率较高。相反，后一种情况属于极端降雨，没有极端对流事件，闪电频率较低。本研究中使用的数值模型成功地再现了两种情况之间闪电频率的差异。我们的分析表明，两种情况下闪电频率的差异归因于电荷分离率和电荷密度的垂直结构的差异，而电荷分离率和电荷密度的差异源于霰石垂直分布的差异。
The causes for the differences in the lightning frequency between two heavy rainfall events, the 2017 northern Kyushu heavy rainfall event and the 2018 heavy rainfall event in central Japan, were examined using a numerical model coupled with an explicit bulk lightning model. These heavy rainfall events occurred near theBaiufrontal system of Japan in July, but the characteristics of rainfall differed. The former case was categorised as an extreme rainfall and extreme convective event by previous satellite observational studies, and the lightning frequency was high. Conversely, the latter case was categorised as an extreme rainfall without extreme convection event, and the lightning frequency was low. The numerical model used in this study successfully reproduced the differences in the lightning frequency between the two cases. Our analyses indicated that the differences in the lightning frequency between the two cases were attributed to the differences in the vertical structure of the charge separation rate and the charge density, which originated from the difference in the vertical distribution of graupel.
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DOI：
10.1016/s0016-0032(26)91419-1
发表时间：
1967
期刊：
The Central African journal of medicine
影响因子：
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作者：
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通讯作者：
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2005
期刊：
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影响因子：
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作者：
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通讯作者：
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影响因子：
1.9
作者：
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通讯作者：
Moteki Qoosaku
影响因子：
4.3
作者：
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DOI：
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发表时间：
1998
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