Geoscientific Model Development A standard test case suite for two-dimensional linear transport on the sphere: results from a collection of state-of-the-art schemes

P. H. Lauritzen 1 P. A. Ullrich 2 C. Jablonowski 3 P. A. Bosler 3 D. Calhoun 4 A. J. Conley 5 T. Enomoto 6 L. Dong 7 S. Dubey 8 O. Guba 9 A. B. Hansen 10 E. Kaas 11 J. Kent 3 J.-F. Lamarque 1 M. J. Prather 12 D. Reinert 13 V. V. Shashkin 14, 15 W. C. Skamarock 1 B. Sørensen 12 M. A. Taylor 16 M. A. Tolstykh 14, 15
1 NCAR - National Center for Atmospheric Research [Boulder]
2 University of California at Davis, Davis, CA, United States
3 AOSS - Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor]
4 Boise State University, Boise, ID, United States
5 University of Colorado Boulder [Boulder]
6 Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto, Japan
7 LASG - Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics
IAP - Institute of Atmospheric Physics [Beijing]
8 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
9 SNL - Sandia National Laboratories [Albuquerque]
10 NIWA - National Institute of Water and Atmospheric Research [Wellington]
11 Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
12 ESS - Department of Earth System Science [Irvine]
13 DWD - Deutscher Wetterdienst [Offenbach]
14 Institute of Numerical Mathematics, RAS, Moscow, Russian Federation
15 Hydrometcentre of Russia, Moscow, Russian Federation
16 University of Calgary
Abstract : Recently, a standard test case suite for 2-D lin-ear transport on the sphere was proposed to assess im-portant aspects of accuracy in geophysical fluid dynam-ics with a "minimal" set of idealized model configura-tions/runs/diagnostics. Here we present results from 19 state-of-the-art transport scheme formulations based on finite-difference/finite-volume methods as well as emerging (in the context of atmospheric/oceanographic sciences) Galerkin methods. Discretization grids range from traditional regular latitude–longitude grids to more isotropic domain discretiza-tions such as icosahedral and cubed-sphere tessellations of the sphere. The schemes are evaluated using a wide range of diagnostics in idealized flow environments. Accuracy is assessed in single-and two-tracer configurations using con-ventional error norms as well as novel diagnostics designed for climate and climate–chemistry applications. In addition, algorithmic considerations that may be important for com-putational efficiency are reported on. The latter is inevitably computing platform dependent. The ensemble of results from a wide variety of schemes presented here helps shed light on the ability of the test case suite diagnostics and flow settings to discriminate between algorithms and provide insights into accuracy in the context of global atmospheric/ocean modeling. A library of bench-mark results is provided to facilitate scheme intercomparison and model development. Simple software and data sets are made available to facilitate the process of model evaluation and scheme intercomparison.
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Article dans une revue
Geoscientific Model Development, European Geosciences Union, 2014, 7 (1), pp.105 - 145. 〈10.5194/gmd-7-105-2014〉
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P. H. Lauritzen, P. A. Ullrich, C. Jablonowski, P. A. Bosler, D. Calhoun, et al.. Geoscientific Model Development A standard test case suite for two-dimensional linear transport on the sphere: results from a collection of state-of-the-art schemes. Geoscientific Model Development, European Geosciences Union, 2014, 7 (1), pp.105 - 145. 〈10.5194/gmd-7-105-2014〉. 〈hal-01074227〉

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