Spatio-Temporal Characteristics of Energetic Lightning in Southeast Asia: Preliminary Statistical Results
Spatio-Temporal Characteristics of Energetic Lightning in Southeast Asia: Preliminary Statistical Results
复制标题
东南亚高能闪电时空特征：初步统计结果
DOI：
10.1007/978-981-16-8690-0_29
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
H. Kikuchi & M. Stock
中科院分区：
文献类型：
--
作者：
S. Akama;Y. Hobara;A. Izzani Mohamed;C. Gomes;K. Shiokawa;S.Hirai;H. Kikuchi & M. Stock
东南亚地区被称为世界上闪电多发地区之一。然而，高能量闪电放电的空间和时间分布，导致自然灾害，如当地电网系统的重大损害和森林火灾，仍然是未知的。本文报道了马来半岛附近高能闪电统计特征的初步结果。利用ENTLN（Earth Networks Total Lightning Network，地球网络总闪电网络）获得了高精度的闪电时间、闪电位置和闪电峰值电流，并利用马来西亚彭亨州（彭亨）的地面极低频磁场观测数据，获得了垂直电荷矩变化作为高能量闪电的代表，其阈值小于10 C·km。首次成功地导出了该地区雨季和旱季的能量闪电特征。结果表明，高能量闪电频繁发生在整个雨季和旱季，主要是在马六甲海峡。为了进一步了解高能闪电的季节性和年度依赖性及其与当地气候条件的关系，有必要进行长期的统计分析。
The region of Southeast Asia is known as one of the lightning-prone areas in the world. However, spatial and temporal distributions of high-energy lightning discharges, which cause natural disasters e.g. significant damages to local power grid systems and forest fires, are still unknown. This paper reports initial results on the statistical characteristics of energetic lightning around Malay Peninsula. Highly accurate timing and location as well as lightning peak current () of lightning strokes were obtained by ENTLN (Earth Networks Total Lightning Network), while the vertical charge moment changeas a proxy of high-energy lightning was derived by using ground-based ELF magnetic field observations in Pahang, Malaysia with a small threshold of less than 10 C·km. The characteristics of energetic lightning for both rainy and dry seasons were successfully derived for the first time in this region. The results indicate that highly energetic lightning occur frequently throughout the rainy and dry seasons, mainly over the Malacca Strait. Long-term statistical analysis with an extended data analysis period is necessary to understand further the seasonal and yearly dependences of energetic lightning and their relations with local climate conditions.