A multi-resolution method for climate system modeling: application of Spherical Centroidal A multi-resolution method for climate system modeling: Application of Spherical Centroidal Voroni Tessellations

Ringler, Todd D; Gunzburger, Max; Ju, Lili

doi:10.1007/s10236-008-0157-2

A multi-resolution method for climate system modeling: application of Spherical Centroidal A multi-resolution method for climate system modeling: Application of Spherical Centroidal Voroni Tessellations

Journal Article · Mon Dec 31 23:00:00 EST 2007 · Ocean Dynamics

DOI:https://doi.org/10.1007/s10236-008-0157-2· OSTI ID:964966

Ringler, Todd D ^[1]; Gunzburger, Max ^[2]; Ju, Lili ^[3]

Los Alamos National Laboratory
FLORIDA STATE UNIV
UNIV OF SOUTH CAROLINA

During the next decade and beyond, climate system models will be challenged to resolve scales and processes that are far beyond their current scope. Each climate system component has its prototypical example of an unresolved process that may strongly influence the global climate system, ranging from eddy activity within ocean models, to ice streams within ice sheet models, to surface hydrological processes within land system models, to cloud processes within atmosphere models. These new demands will almost certainly result in the develop of multi-resolution schemes that are able, at least regional to faithfully simulate these fine-scale processes. Spherical Centroidal Voronoi Tessellations (SCVTs) offer one potential path toward the development of robust, multi-resolution climate system component models, SCVTs allow for the generation of high quality Voronoi diagrams and Delaunay triangulations through the use of an intuitive, user-defined density function, each of the examples provided, this method results in high-quality meshes where the quality measures are guaranteed to improve as the number of nodes is increased. Real-world examples are developed for the Greenland ice sheet and the North Atlantic ocean. Idealized examples are developed for ocean-ice shelf interaction and for regional atmospheric modeling. In addition to defining, developing and exhibiting SCVTs, we pair this mesh generation technique with a previously developed finite-volume method. Our numerical example is based on the nonlinear shallow-water equations spanning the entire surface of the sphere. This example is used to elucidate both the potential benefits of this multi-resolution method and the challenges ahead.

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Research Organization:: Los Alamos National Laboratory (LANL)

Sponsoring Organization:: DOE

DOE Contract Number:: AC52-06NA25396

OSTI ID:: 964966

Report Number(s):: LA-UR-08-05303; LA-UR-08-5303

Journal Information:: Ocean Dynamics, Journal Name: Ocean Dynamics

Country of Publication:: United States

Language:: English

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