KUET Institutional Repository

Prediction of Formation and Tracks of Bay of Bengal Cyclones

Show simple item record

dc.contributor.advisor Shafee, Prof. Sultana
dc.contributor.author Alam, Dr. Md. Mahbub
dc.date.accessioned 2018-09-02T10:13:26Z
dc.date.available 2018-09-02T10:13:26Z
dc.date.copyright 1998
dc.date.issued 1998-12
dc.identifier.other ID 3 1/1991-92
dc.identifier.uri http://hdl.handle.net/20.500.12228/450
dc.description This thesis is submitted to the Department of Physics, Dhaka University in partial fulfillment of the requirements for the degree of Doctor of Philosophy, December 1998. en_US
dc.description Cataloged from PDF Version of Thesis.
dc.description Includes bibliographical references (pages 234-241).
dc.description.abstract Rawindsonde data of 0000 UTC for standard isobaric surfaces at the surface, 850, 700, 500, 400, 300, 200, 150 and 100 hPa levels for the periods of different cyclones in the last decade were considered to study the different meteorological parameters. The vertical wind shear, the vertical variation of zonal wind speed and meridional wind speed and temperature were studied for different cyclones in the surroundings of the Bay of Bengal in relation to the movement of cyclones. The dry static energy, the latent heat energy, the moist static energy, the total energy, the meridional and zonal fluxes of moist static energy and their vertical distribution were studied in the surroundings of the Bay of Bengal in relation to the movement of cyclones and their ultimate landfall. A two dimensional model is developed for the prediction of cyclone tracks in the Bay of Bengal. The boundary value problem is then solved by using the complex potentials. The different cyclones are integrated in different time steps to find the relationship between the actual travel time and observed time by the models. The results obtained for cyclone tracks by this model are almost the same as the actual track. The cyclonic track data were collected from the Storm Warning Centre (SWC) of Bangladesh Meteorological Department (BMD). A simplified system of equations that can simulate the evolution and mature stages of tropical cyclones is presented. The study has been done using a three-dimensional numerical model constructed which produces circularly symmetric feature of the tropical cyclone. It has 5 layers in the vertical with the horizontal extent of 1200 km. The horizontal grid length of the model is 80 km. The model equations have been solved using the Leapfrog scheme. Numerical simulation shows that the model sensitivity to the vertical stability is similar to results obtained from other general models. Latent heat release associated with condensation is calculated from the moisture equation. The sensible heating parameter is added to the heating term. Initially the model atmosphere is assumed to be at rest and is then excited by a large scale heating to generate an initial vortex. The evolution of surface pressure drop, tangential wind, radial wind, heat released due to condensation, temperature anomaly, D-value, horizontal structure of vertical p-velocity, vertical structure of vertical p-velocity, vorticity and static stability parameter have been discussed based on the results obtained from the tropical cyclone modelling experiment. en_US
dc.description.statementofresponsibility Dr. Md. Mahbub Alam
dc.format.extent 241 pages
dc.language.iso en_US en_US
dc.publisher Dhaka University (DU), Dhaka, Bangladesh. en_US
dc.rights Khulna University of Engineering & Technology (KUET) thesis/dissertation/internship reports are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission.
dc.subject Cyclone en_US
dc.subject Wind Speed en_US
dc.subject Tropical Cyclone en_US
dc.subject Surface Pressure en_US
dc.title Prediction of Formation and Tracks of Bay of Bengal Cyclones en_US
dc.type Thesis en_US
dc.description.degree Doctor of Philosophy
dc.contributor.department Department of Physics

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search KUET IR


My Account