Decadal Regional Climate Studies and Applications with Variable-Resolution GCMs Using Advanced Numerical Techniques

We are preparing surface boundary conditions necessary for running the 12-year (1987-1998) regional (U.S.) climate simulation with enhanced 50 km resolution using the variable-resolution stretched-grid (SG) GCM. This experiment will be performed for the international SGMIP (Stretched-Grid Model Intercomparison Project) initiated by the P.I.

Other activities

• The new stretched-grid design with multiple (four) areas of interest with enhanced regional resolution, one within each global quadrant, has been implemented into the SG-GCM. The annual simulation for 1998 was performed with 50 km regional resolution for all four areas of interest that include the major monsoonal circulations. The analysis of anomalous events of 1998 Is described in a journal paper submitted for publication. The results were also presented at the 82nd AMS Meeting, January 2002, Orlando, FL. The SG-GCM successfully tested for the 1998 simulation will be used for the international SGMIP.
• The first version of the new SG-fvGCM using the Lin-Rood finite-volume (fv) scheme and the NCAR CAM physics, has been developed and is being tested. The advanced numerical approximation used in the model will allow us to use new stretching strategies. This model after extensive testing is planned to be used for the international SGMIP as well.

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