Articles | Volume 15, issue 16
Geosci. Model Dev., 15, 6285–6310, 2022
https://doi.org/10.5194/gmd-15-6285-2022
Geosci. Model Dev., 15, 6285–6310, 2022
https://doi.org/10.5194/gmd-15-6285-2022
Development and technical paper
16 Aug 2022
Development and technical paper | 16 Aug 2022

Islet: interpolation semi-Lagrangian element-based transport

Andrew M. Bradley et al.

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Short summary
Tracer transport in atmosphere models can be computationally expensive. We describe a flexible and efficient interpolation semi-Lagrangian method, the Islet method. It permits using up to three grids that share an element grid: a dynamics grid for computing quantities such as the wind velocity; a physics parameterizations grid; and a tracer grid. The Islet method performs well on a number of verification problems and achieves high performance in the E3SM Atmosphere Model version 2.