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CAM high-resolution AMIP simulations using a spectral finite element dynamical core

Presented by: 
Mark Taylor Sandia National Laboratories
Date: 
Friday 28th September 2012 - 09:25 to 09:50
Venue: 
INI Seminar Room 1
Session Title: 
From Dynamical Cores to Operational Models
Abstract: 
We will present results from high-resolution AMIP simulations using CAM-SE: The Community Atmosphere Model (CAM), running with the Spectral finite Element dynamical core from NCAR's High-Order Method Modeling Environment. CAM-SE is now supported within the Community Earth System Model. It uses fully unstructured conforming quadrilateral grids, and thus supports global high resolution through quasi-uniform grids and localized regions of high resolution with unstructured grids. For global 1/4 and 1/8 degree resolutions, CAM-SE runs efficiently on hundreds of thousands of processors on modern Cray and IBM supercomputers and obtains excellent simulation throughput. For variable resolution grids, our simulations benefit from a new mixed-formulation tensor-based hyper-viscosity operator. The mixed-formulation allows for efficient implementation in finite element methods, and a tensor form is used to provide the correct scale-aware dissipation, especially in the distorted elements which appear in resolution transition regions.
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Presentation Material: 
University of Cambridge Research Councils UK
    Clay Mathematics Institute The Leverhulme Trust London Mathematical Society Microsoft Research NM Rothschild and Sons