Effects of convective available potential energy, temperature and humidity on the variability of thunderstorm frequency over Bangladesh

被引:0
作者
Md Wahiduzzaman
Md. Arfan Ali
Jing-Jia Luo
Yu Wang
Md. Jalal Uddin
Shamsuddin Shahid
A. R. M. Towfiqul Islam
Sanjit Kumar Mondal
Ubaydur Rahaman Siddiki
Muhammad Bilal
Zhongfeng Qiu
Ramzah Dambul
Kutubuddin Eibek
Md. Emdadul Haque
机构
[1] Nanjing University of Information Science and Technology,Institute for Climate and Application Research (ICAR)/ Key Laboratory of Meteorological Disaster of Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological
[2] Nanjing University of Information Science and Technology (NUIST),Lab of Environmental Remote Sensing (LERS), School of Marine Sciences (SMS)
[3] Nanjing University of Information Science & Technology,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric Physics
[4] Universiti Teknologi Malaysia (UTM),Department of Water & Environmental Engineering, School of Civil Engineering
[5] Begum Rokeya University,Department of Disaster Management
[6] Rangpur,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster/ Institute for Disaster Risk Management/ School of Geographical Science
[7] Nanjing University of Information Science and Technology,Department of Geography and Environment
[8] Jahangirnagar University,Faculty of Social Sciences and Humanities
[9] Universiti Malaysia Sabah,undefined
来源
Theoretical and Applied Climatology | 2022年 / 147卷
关键词
Thunderstorm; CAPE; Temperature; Humidity; Empirical orthogonal function; Bangladesh;
D O I
暂无
中图分类号
学科分类号
摘要
The present study examines the effects of convective available potential energy (CAPE), temperature and humidity on the spatiotemporal variation of thunderstorm (TS) frequency over Bangladesh using an Empirical Orthogonal Function (EOF) approach. TS and CAPE, temperature, humidity data have been used for 38-year (1980–2017) and collected from the Bangladesh Meteorological Department and ERA-40 reanalysis, respectively. Mann-Kendall nonparametric trend test, Sen’s slope, Pearson’s correlation and EOF modes are applied to understand the variability of TS and the effects of CAPE, temperature and humidity on it. Results show a decrease in TS frequency in Bangladesh at a rate of −0.408/year annually and − 0.384/year during pre-monsoon, when it is most prevalent. The TS frequency spatially varies widely over Bangladesh. The present study shows an increase in TS in the areas where it is less prevalent and a decrease in the areas where it occurs more. CAPE shows a decreasing trend during winter and an increasing trend during post-monsoon and at an annual scale. TS frequency is positively correlated with CAPE and humidity and negatively with temperature. Therefore, the rising temperature may be the cause of decreasing TS frequency in Bangladesh. The findings can be useful for hazard management planning in Bangladesh.
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页码:325 / 346
页数:21
相关论文
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