Abstract
This paper presents a methodology which is very useful to design shape-preserving advection finite difference scheme on general E-grid horizontal arrangement of variables through introducing a two-step shape-preserving positive definite advection scheme in the moisture equation of the LASG-REM (LASG regional E-grid eta-coordinate forecast model). By trial-forecasting six local heavy raincases, the efficiency of the shape-preserving advection scheme in practical application has been examined. The LASG-REM with the shape-preserving advection scheme has a good forecasting ability for local precipitation.
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References
Yu Rucong (1989), Design of the limited area numerical weather prediction model with steep mountains,Chinese Journal of Atmospheric Sciences,13(2): 145–158.
Yu Rucong (1994), A New Two-Step Shape-Preserving Advection Scheme,Advances in Atmospheric Sciences,11(4): 479–490.
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Rucong, Y. Application of a shape-preserving advection scheme to the moisture equation in an E-grid regional forecast model. Adv. Atmos. Sci. 12, 13–19 (1995). https://doi.org/10.1007/BF02661283
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DOI: https://doi.org/10.1007/BF02661283