Held-Suarez simulations with the Community Atmosphere Model Spectral Element (CAM-SE) dynamical core: a global axial angular momentum analysis using Eulerian and floating Lagrangian vertical coordinates - Sorbonne Université Accéder directement au contenu
Article Dans Une Revue Journal of Advances in Modeling Earth Systems Année : 2014

Held-Suarez simulations with the Community Atmosphere Model Spectral Element (CAM-SE) dynamical core: a global axial angular momentum analysis using Eulerian and floating Lagrangian vertical coordinates

Résumé

In this paper, an analysis of the global AAM conservation properties of NCAR’s Community Atmosphere Model Spectral Element (CAM-SE) dynamical core under Held-Suarez forcing is presented. It is shown that the spurious sources/sinks of AAM in CAM-SE are 3 orders of magnitude smaller than the parameterized (physical) sources/sinks. The effect on AAM conservation by changing various numerical aspects of the dynamical core (e.g., different vertical coordinates, reduced formal order of accuracy, increased dissipation, and decreased divergence damping) is investigated. In particular, it is noted that changing from Eulerian (hybrid-sigma) to floating Lagrangian vertical coordinates does not alter the global AAM conservation properties of CAM-SE.

Domaines

Planétologie
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Dates et versions

hal-01080907 , version 1 (16-06-2017)

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Peter Lauritzen, Julio Bacmeister, Thomas Dubos, Sébastien Lebonnois, Mark A. Taylor. Held-Suarez simulations with the Community Atmosphere Model Spectral Element (CAM-SE) dynamical core: a global axial angular momentum analysis using Eulerian and floating Lagrangian vertical coordinates. Journal of Advances in Modeling Earth Systems, 2014, 6, pp.129-140. ⟨10.1002/2013MS000268⟩. ⟨hal-01080907⟩
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