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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https://hal.inria.fr/hal-01117048
Contributor : Luc Giraud <>
Submitted on : Monday, February 16, 2015 - 12:23:36 PM
Last modification on : Wednesday, October 9, 2019 - 1:21:25 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, European Geosciences Union, 2015, 8, pp.205 - 220. ⟨10.5194/gmd-8-205-2015⟩. ⟨hal-01117048⟩

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