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Pangolin v1.0, a conservative 2-D advection model towards large-scale parallel calculation

Abstract : To exploit the possibilities of parallel comput-ers, we designed a large-scale bidimensional atmospheric advection model named Pangolin. As the basis for a fu-ture chemistry-transport model, a finite-volume approach for advection was chosen to ensure mass preservation and to ease parallelization. To overcome the pole restriction on time steps for a regular latitude–longitude grid, Pangolin uses a quasi-area-preserving reduced latitude–longitude grid. The features of the regular grid are exploited to reduce the mem-ory footprint and enable effective parallel performances. In addition, a custom domain decomposition algorithm is pre-sented. To assess the validity of the advection scheme, its re-sults are compared with state-of-the-art models on algebraic test cases. Finally, parallel performances are shown in terms of strong scaling and confirm the efficient scalability up to a few hundred cores.
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Contributor : Luc Giraud Connect in order to contact the contributor
Submitted on : Thursday, September 23, 2021 - 8:40:40 AM
Last modification on : Thursday, November 17, 2022 - 4:12:14 AM
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Alexis Praga, Daniel Cariolle, Luc Giraud. Pangolin v1.0, a conservative 2-D advection model towards large-scale parallel calculation. Geoscientific Model Development, 2015, 8, pp.205 - 220. ⟨10.5194/gmd-8-205-2015⟩. ⟨hal-01117048⟩



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