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Synoptic climatology of pre-monsoon frequent lightning events in Bangladesh

Author

Listed:
  • Murad Ahmed Farukh

    (Bangladesh Agricultural University)

  • Md. Azharul Islam

    (Bangladesh Agricultural University)

  • Md. Nasir Uddin

    (Bangladesh Agricultural University)

Abstract

In Bangladesh, there were 1073 lightning-related deaths reported only in May from 2010 to 2021. This figure accounts for 34% of the total lightning-related deaths in the country. A strong sea-level pressure ridge from the north-west and a 500 hPa geo-potential height ridge spanning across north-west to south-east Bangladesh favour frequent pre-monsoon lightning. The elongated low-pressure trough over the Gangetic plains of India towards Bangladesh is a very unique geo-characteristic for convective activity in May. Heightened pre-monsoon lightning activity is also due to a very strong temperature anomaly coupled with an associated convective precipitation system that is triggered by topographic forces from the Shillong Plateau and the Chittagong Hill Tracts. The southerly to south-westerly low-level jet assists moisture transport from the Bay of Bengal in the pre-monsoon. Further, the north to north-westerly subtropical jet stream provides conditions that are conducive to the development of frequent pre-monsoon lightning activity. Moreover, convective available potential energy (CAPE) all over the country in May destabilises the country’s atmosphere with numerous thunderstorms. Precise information of the pre-monsoon climatological anomaly and the associated atmospheric stability indices can be beneficial for the management of lightning-related deaths in Bangladesh.

Suggested Citation

  • Murad Ahmed Farukh & Md. Azharul Islam & Md. Nasir Uddin, 2023. "Synoptic climatology of pre-monsoon frequent lightning events in Bangladesh," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 116(1), pages 1053-1070, March.
  • Handle: RePEc:spr:nathaz:v:116:y:2023:i:1:d:10.1007_s11069-022-05711-2
    DOI: 10.1007/s11069-022-05711-2
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    References listed on IDEAS

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    1. Bhishma Tyagi & V. Naresh Krishna & A. Satyanarayana, 2011. "Study of thermodynamic indices in forecasting pre-monsoon thunderstorms over Kolkata during STORM pilot phase 2006–2008," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 56(3), pages 681-698, March.
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