Trend Identification of Thunderstorms and Associated Casualties over Hilly Terrain of Jharkhand and Plains of Gangetic West Bengal

  • Suman Chattopadhyay Regional Meteorological Centre, Kolkata, Alipore
  • Raja Acharya Regional Meteorological Centre, Kolkata, Alipore
Keywords: Thunderstorms, Fatalities, Mann-Kendall trend test and Sen’s slope estimation.

Abstract

An attempt is made in the present study to identify the trends of thunderstorms and associated casualties over two regions, namely Jharkhand and Gangetic West Bengal having different orography with 32yrs of observation across 22 meteorological stations. The non-parametric Mann-Kendall test and Sen’s slope estimators have been used to calculate the trends. The results show that the frequency of thunderstorms is maximum in the month of April during the pre-monsoon season and in June during the monsoon season over both Jharkhand and Gangetic West Bengal. However, there is variability in the occurrence of thunderstorms over different districts of Jharkhand as well as Gangetic West Bengal. The causalities, on the other hand, during the period 1985 to 2017 over both Jharkhand and Gangetic West Bengal are observed to be maximum in the months of May and August respectively. The trend analyses show that in most of the districts of Jharkhand and Gangetic west Bengal, thunderstorms have increasing trends in both pre-monsoon and monsoon seasons during the study period.

Published
2024-02-20
How to Cite
Chattopadhyay, S., & Acharya, R. (2024). Trend Identification of Thunderstorms and Associated Casualties over Hilly Terrain of Jharkhand and Plains of Gangetic West Bengal. Vayumandal, 45(2), 49-56. Retrieved from https://vayumandal.imetsociety.org/index.php/Vayumandal/article/view/86
Issue
Vol 45 No 2 (2019): VAYUMANDAL
Section
Research Paper

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