European Space Weather Week 2025

The influence of solar activity like sun spot number, solar flux F10.7, Total Solar Irradiance(TSI) and Lyman-Alpha flux over the Tropical Cyclones and Atlantic Hurricanes during 1979 to 2018

Not scheduled

20m

Mon 27/10, Tue 28/10, Wed 29/10: Idun; Thu 30/10: Tonsalen

Poster SWR2 - Interdisciplinary Insights into Space Weather Events of Solar Cycle 25: From Solar Origins to Planetary Impacts SWR2 – Interdisciplinary Insights into Space Weather Events of Solar Cycle 25: From Solar Origins to Planetary Impacts

Speaker

DHRUBA BANERJEE (Swami Vivekananda Institute of Science and Technology)

Description

This study investigates the variability in the occurrence of Atlantic Hurricanes (AHU) over the Atlantic and East Caribbean regions and Tropical Cyclones (TC) over the Bay of Bengal and Arabian Sea during the period 1979–2018. A comprehensive statistical analysis, including correlation and regression methods, is employed to explore the relationship between solar activity and cyclone occurrences in these regions. Solar activity is represented using the 10.7 cm solar radio flux (F10.7) and Sunspot Number (SSN). Normalized occurrence rates of AHU were derived from datasets provided by the National Hurricane Center (NOAA) and National Ocean Services (NOAA), while data for TC were sourced from the India Meteorological Department (IMD), including Bestpara, Besttrack, and Cyclone e-atlas data.

The correlation analysis reveals significant relationships between solar activity and cyclone occurrence. For TC in the Indian Ocean, the correlation coefficients are 0.646 for F10.7 and 0.82 for SSN, with a statistical significance of 83%. Similarly, for AHU, the coefficients are 0.65 for F10.7 and 0.82 for SSN, with 78% significance. Additional analysis also examines the correlation of Lyman-alpha flux and Total Solar Irradiance (TSI) with both AHU and TC activity. These findings suggest a notable influence of solar variability on tropical cyclone activity across these regions.