- A21F-2080: Composite Characteristics and Lightning Flash Rates in Summer and Winter Thunderstorms over Bangladesh
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Board 2080‚ Hall EFG (Poster Hall)NOLA CC
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Munmun Akter, University of Dhaka (First Author, Presenting Author)
Fatima Akter, University of Dhaka
Alamgir Kabir, University of Dhaka
Khan Md Golam Rabbani, Regional Integrated Multi-Hazard Early Warning System for Africa and Asia
Sifat Tanzil Ovi, University of Dhaka
Lightning is an extremely dangerous weather hazard in Bangladesh, sadly leading to one of the highest numbers of deaths in South Asia each year.This study looked closely at how lightning behaves differently in Bangladesh's summer and winter thunderstorms to help improve forecasts. We examined five typical lightning events from both summer and winter between 2019 and 2025. We used a computer weather model to estimate lightning activity, focusing on two main methods: one based on how fast air moves upwards in storms, and another called the 'Lightning Potential Index.' We also studied atmospheric conditions using reanalysis data and compared our model's predictions of things like rainfall and wind with actual observations.Our findings show that the model did a good job capturing where and when lightning occurred during summer storms, even though its predictions were sometimes slightly off in terms of exact location. However, winter lightning events were much weaker and less widespread, and our model struggled to accurately predict them, showing large differences in timing and location. Still, the 'Lightning Potential Index' method proved more effective for both seasons.This research helps us better understand lightning's unique characteristics in Bangladesh, especially for the less common winter events.
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