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Sunil Kumar

Assessment of remote sensing-based environmental features of severe cyclonic storm ‘Dana’ over the Bay of Bengal in October 2024 - P 465-471

The present study investigates the structural, dynamic
and thermodynamic characteristics of severe cyclonic
storm, ‘Dana’, the first post-monsoon tropical cyclone
over the North Indian Ocean in 2024. Using synoptic
data and satellite imageries, we have analysed the evolution of storm, intensity changes and atmospheric interactions. The structural analysis reveals that ‘Dana’
predominantly exhibited an irregular central dense
overcast pattern with a mean diameter of 173 km
throughout its lifecycle. Dynamically, the development
and movement of the cyclone were influenced by wind
profiles, sea-surface temperature (SST), upper-level
divergence, lower-level convergence and atmospheric
pressure patterns. The average vertical wind shear
was 16 knots, increasing to 20 knots during cyclone
strengthening. Regarding thermodynamics, SST ranged
from 29°C to 30°C over the central and northern Bay
of Bengal and the north Andaman Sea, with tropical
cyclone heat potential between 100 and 112 kJ/cm2
.
This study integrates satellite-based observations with
traditional meteorological data, providing valuable insights into the internal dynamics of the cyclone and
contributing to improved forecasting and understanding of factors influencing tropical cyclone intensity and
track in the region.

Subjects--Facted Index Terms:
Bay of Bengal
dynamic features
satellite imagery
structural analysis
thermodynamic processes
tropical cyclone