A spatiotemporal analysis of lightning in the Bangkok Metropolitan Region

IF 1.8 Q2 GEOGRAPHY

Asian Geographer Pub Date : 2021-12-01 DOI:10.1080/10225706.2021.2010579

M. Bentley, Jinda Sae-Jung, S. Kaminski, Charlotte C. Terry

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Abstract

ABSTRACT This investigation analyzes the spatiotemporal lightning distribution from 2016 through 2020 for the Bangkok Metropolitan Region (BMR). Results suggest that significant urban augmentation of the lightning and subsequent thunderstorm distribution is occurring in the BMR. The distribution of lightning across the BMR is shaped by wind direction, wind speed and location of urban land cover. There exists a prominent two-peak (May and October) monthly distribution in the BMR lightning activity. October lightning counts are nearly double the amount occurring in May, with a lull in activity during July, August and the dry monsoonal months of December through March. However, both the number of lighting days and hours remain elevated from April through October, with thunderstorm lightning productivity highest in October, April, and September respectively. Lightning activity in the BMR is most frequent between 1100–1300 and 1900–2300 Local Standard Time. Significant enhancement of the lightning distribution occurs downwind of the Bangkok central business district and appears to be dependent on both the wind direction and speed. As wind speeds decrease, results suggest the spatial distribution of lightning strokes and lightning days become more focused over downtown Bangkok.

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曼谷大都会区闪电的时空分析

摘要本研究分析了2016年至2020年曼谷大都会区（BMR）的时空闪电分布。结果表明，BMR中闪电和随后的雷暴分布正在显著增加。闪电在BMR上的分布受风向、风速和城市土地覆盖位置的影响。BMR闪电活动存在明显的双峰（5月和10月）月分布。10月的闪电数量几乎是5月的两倍，7月、8月以及12月至3月的干燥季风月份的活动有所减弱。然而，从4月到10月，照明天数和小时数仍在增加，雷暴闪电生产力分别在10月、4月和9月最高。BMR的闪电活动在当地标准时间1100–1300至1900–2300之间最为频繁。闪电分布的显著增强发生在曼谷中央商务区的下风处，似乎取决于风向和风速。随着风速的降低，研究结果表明，雷击和雷击天数的空间分布更加集中在曼谷市中心。

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来源期刊

Asian Geographer GEOGRAPHY-

CiteScore

3.30

自引率

0.00%

发文量

期刊介绍： Asian Geographer disseminates knowledge about geographical problems and issues focusing on Asia and the Pacific Rim. Papers dealing with other regions should have a linkage to Asia and the Pacific Rim. Original and timely articles dealing with any field of physical or human geographical inquiries and methodologies will be considered for publication. We welcome, for example, submissions on people-environment interactions, urban and regional development, transport and large infrastructure, migration, natural disasters and their management, environment and energy issues. While the focus of the journal is placed on original research articles, review papers as well as viewpoints and research notes under the category of “Asian Geography in Brief” are also considered. Review papers should critically and constructively analyse the current state of understanding on geographical and planning topics in Asia. The ‘Asian Geography in Brief’ section welcomes submissions of applied geographical and planning research about Asia. The section aims to showcase (1) the diverse geography and planning of Asia; and (2) the diverse geographical and planning research about Asia. The journal will also publish special issues on particular themes or areas. Book reviews can be included from time to time.