Seminar Title:
Large-Scale Environmental Features during Maximum Intensity of Tropical Cyclones
Seminar Type:
Departmental Seminar
Department:
Earth and Atmospheric Sciences
Speaker Name:
Mr. Mohan Murali Krishna Gorja
Speaker Type:
Student
Venue:
ER-303 Class Room
Date and Time:
26 Sep 2024 05:00PM
Contact:
8125817908
Abstract:
The study investigates the variation in large-scale environment during the maximum intensity of
tropical cyclones (TC) formed in the Bay of Bengal. TC tracks are classified into four groups based on
their direction of movement using the k-means clustering technique. Results from the pressure level and
azimuthal-averaged radial-height wind fields near the vortex centre show weak deep layer wind shear
(WS) and abundant moisture in all clusters. However, large-scale environmental differences in the
northwest quadrant are identified with a contrasting combination of WS and humid environment
between clusters. The composites of OLR are also analyzed during maximum intensities of TC. Results
show that anomalous high OLR in the west–northwest direction from the vortex centre, along with the
low OLR around the vortex centre, signify the formation of a strong OLR dipole during TC peak
intensity. Furthermore, OLR dipole metrics, such as magnitude, orientation, and distance, are observed
by having mean of 235 Wm−2, 147o , and 1782 km along with standard deviation of 14 Wm−2 , 34°, and 492 km, respectively. The identified large-scale environmental fields from this study could provide
valuable insights for predicting the intensity and movement of TC.