Impact of horizontal resolution on prediction of tropical cyclones over Bay of Bengal using a regional weather prediction model

Mandal, M. ; Mohanty, U. C. ; Potty, K. V. J. ; Sarkar, A. (2003) Impact of horizontal resolution on prediction of tropical cyclones over Bay of Bengal using a regional weather prediction model Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences, 112 (1). pp. 79-93. ISSN 0253-4126

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Official URL: http://www.ias.ac.in/jess/mar2003/Esb1427.pdf

Related URL: http://dx.doi.org/10.1007/BF02710045

Abstract

The present study is carried out to examine the performance of a regional atmospheric model in forecasting tropical cyclones over the Bay of Bengal and its sensitivity to horizontal resolution. Two cyclones, which formed over the Bay of Bengal during the years 1995 and 1997, are simulated using a regional weather prediction model with two horizontal resolutions of 165 km and 55 km. The model is found to perform reasonably well towards simulation of the storms. The structure, intensity and track of the cyclones are found to be better simulated by finer resolution of the model as compared to the coarse resolution. Rainfall amount and its distribution are also found to be sensitive to the model horizontal resolution. Other important fields, viz., vertical velocity, horizontal divergence and horizontal moisture flux are also found to be sensitive to model horizontal resolution and are better simulated by the model with finer horizontal grids.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Tropical Cyclone; Resolution; Track; Regional Model
ID Code:26603
Deposited On:08 Dec 2010 13:30
Last Modified:17 May 2016 09:53

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