Sweep interpolation: a cost-effective semi-Lagrangian scheme in the Global Environmental Multiscale model
Mohammad Mortezazadeh,
Jean-François Cossette,
Ashu Dastoor
et al.
Abstract:Abstract. The interpolation process is the most computationally expensive step of the semi-Lagrangian (SL) approach for solving advection and is commonly used in numerical weather prediction (NWP) models. It has a significant impact on the accuracy of the solution and can potentially be the most expensive part of model integration. The sweep algorithm, which was first described by Mortezazadeh and Wang (2017), performs SL interpolation with the same computational cost as a third-order polynomial scheme but at … Show more
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