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大气科学 2002
On Efficiency of Retrospective Time Integration Scheme
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Abstract:
Adopting the barotropical quasi-geostrophic model as a dynamic kernel and taking Rossby-Haurwitz wave as an idealized field, numerical weather forecast experiments were carried out by means of both retrospective time integration scheme and leapfrog one. Results show the former can reduce the forecast error at 10-1-10-2 in comparison with the latter in case of 1h to 24h lead. Moreo- ver, the retrospective scheme is little sensitive to the time-step extending. Therefore, the computational amount for numerical integrations can be saved and valid prediction time can be enlarged when using the retrospective scheme.
