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An efficient accurate direct solution of Poisson's equation for computation of meteorological parameters

Chakraborty, DR and Salvekar, PS (1989) An efficient accurate direct solution of Poisson's equation for computation of meteorological parameters. Advances in Atmospheric Sciences, 6 (4). pp. 501-508.

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Abstract

Poisson’s equation is solved numerically by two direct methods, viz. Block Cyclic Reduction (BCR) method and Fourier Method. Qualitative and quantitative comparison between the numerical solutions obtained by two methods indicates that BCR method is superior to Fourier method in terms of speed and accuracy. Therefore, BCR method is applied to solve ∇2 Ψ = ζ and ∇2 x =D from observed vorticity and divergent values. Thereafter the rotational and divergent components of the horizontal monsoon wind in the lower troposphere are reconstructed and are compared with the results obtained by Successive Over-Relaxation (SOR) method as this indirect method is generally in more use for obtaining the streamfunction (Ψ) and velocity potential (x) fields in NWP models. It is found that the results of BCR method are more reliable than SOR method.

Item Type: Article
Additional Information: Copyright of this article belongs to Science Press
Uncontrolled Keywords: block cyclic reduction; Fourier method; parameter computation; Poisson equation; successive over relaxation
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 30 Apr 2015 08:33
Last Modified: 30 Apr 2015 08:33
URI: http://moeseprints.incois.gov.in/id/eprint/1155

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