Transparent Boundary Conditions for the Shallow-Water Equations: Testing in a Nested Environment

McDonald, A.
April 2003
Monthly Weather Review;Apr2003, Vol. 131 Issue 4, p698
Academic Journal
Most operational numerical weather prediction models update their lateral boundaries via the Davies–Kållberg relaxation scheme. In this paper some potential alternatives that take transparency and well-posedness into consideration are derived and tested for the shallow-water equations. The accuracy of the new boundary strategies is displayed by integrating the shallow-water equations in a nested environment using real meteorological data. In these tests they are seen to be superior to the traditional relaxation boundary strategy.


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