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Volume 10 Journal of Earth Science & Climatic Change
Page 36
Climate Congress 2019
May 10-11, 2019
conferenceseries .com
May 10-11, 2019 Bangkok, Thailand
8th World Climate Congress
Dynamical approach to identify the track evolution of cyclones over Bay of Bengal
Indrani Ganguly, Jayanti Pal and Sutapa Chaudhuri
University of Calcutta, India
An investigation has been carried out in this research to identify the track evolution process of tropical
cyclones occurred over Bay of Bengal (BOB) through dynamic point of view. Three cyclonic systems
of the same category occurred over Bay of Bengal has been considered for this study. The cyclonic systems,
Kayant, Nada and Maarutha are those systems that have attained their maximum strength and categorize as
Cyclonic System (CS). The Kayant has unique track features that develop over BOB and move east-northeast
ward and subsequently turned westward and dissipated over the ocean. Kayant thus, had no land fall. The
cyclonic systemNada is another system developed as CS over BOB with westward track. Nada developed over
BOB and had landfall at southeast coast of India. The third cyclonic system under investigation is Maarutha,
which had an eastward track and made a land fall over Myanmar. It is observed that the cloud cluster initially
developed under surface westerly current for Maarutha. The analysis depicts that the cloud clusters have
been developing under different surface currents. A tilt in vertical profile of vorticity has been observed
with the track of Kayant and Nada while for Maarutha, tilt of vorticity was not with the track of cyclone. The
divergence field in upper level has been found for the systems Nada and Maarutha however, while for Kayant,
the divergence field in upper level was not observed. The result shows that the evolution of track for each
system was quite different however, they were declared to belong in the same category. The surface current at
initial stage, vertical profile of vorticity and upper level divergence might aid in providing an insight about the
structure of the track of cyclones over BOB.
J Earth Sci Clim Change 2019, Volume 10
DOI: 10.4172/2157-7617-C2-060