Statistically accurate simulations for atmospheric flows

Dubinkina, Svetlana;Frank, Jason
(2009) European Geosciences Union General Assembly — Location: Vienna, Austria (19.April.2009)

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  • Dubinkina, SvetlanaUCLouvain
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  • Frank, JasonCWI, the Netherlands
    Author
Abstract
A Hamiltonian particle-mesh method for quasi-geostrophic potential vorticity flow is proposed. The microscopic vorticity field at any time is an area- and energy-conserving rearrangement of the initial field.We construct a statistical mechanics theory to explain the long-time behavior of the numerical solution. The statistical theory correctly predicts the spatial distribution of particles as a function of their point vorticity. A nonlinear relation between the coarse grained mean stream function and mean vorticity fields is predicted, consistent with the preservation of higher moments of potential vorticity reported in [R. V. Abramov, A. J. Majda 2003, PNAS 100 3841–3846].

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Dubinkina, S., & Frank, J. (2009). Statistically accurate simulations for atmospheric flows. European Geosciences Union General Assembly, Vienna, Austria. https://hdl.handle.net/2078.5/158506