A new technique of physical dissipation and its application to a mesoscale numerical weather prediction model

In terms of statistical physics, a fluid such as the atmosphere is a many-body system which has a vast amount of degree of freedom and thus obeys the second law of thermodynamics.In this paper, a noticeable improvement of the prognostic outputs is made by reconstructing the terms of the horizontal d...

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Bibliographic Details
Published in:Science China. Earth sciences 2002-09, Vol.45 (9), p.769-780
Main Authors: Liu, Chongjian, Liu, Ying, Kang, Hongwen
Format: Article
Language:English
Subjects:
Acoustic waves
Computer applications
Dissipation
Horizontal diffusion
law
Mathematical models
Meteorology
numerical
Numerical prediction
physical
Physics
prediction
Prediction models
second
technique
Thermodynamics
Viscosity
weather
Weather forecasting
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Summary:In terms of statistical physics, a fluid such as the atmosphere is a many-body system which has a vast amount of degree of freedom and thus obeys the second law of thermodynamics.In this paper, a noticeable improvement of the prognostic outputs is made by reconstructing the terms of the horizontal diffusion of MM5 according to the principles of the second law of thermodynamics; besides, the computational noise is effectively and significantly suppressed since the physical dissipative technique for reconstructing suggested in this paper is based on the physical law rather than on the computational method such as the artificial viscosity.
ISSN:1674-7313
1006-9313
1869-1897
1862-2801
DOI:10.1007/BF02879512