1. Simulation of the Late Permian with Community Climate System Model 3
By Michael Fruchtman
And Space Grant Mentor
Dr. Achim Herrmann

2. History of Climate Simulation
Community Climate System Model 3
Released 2004
Used in Intergovernmental Panel on Climate Change Report on global warming.
Modified for Paleoclimate modeling.

3. Structure of CCSM3 Beowulf Linux cluster.
Arizona State University and Saguaro.
Five interconnected programs.
Multiple Program Multiple Data
vs Single Program Multiple Data
Message Passing Interface

4. CCSM3 Process
Thank you George Carr at UCAR.

5. Permian Requirements New datasets, different map.
Small program changes.
500 year simulations.
Automatic restart.
Easy, simple data management.
Fast, default processor configuration too slow.

6. Permian Map
Map made available Dr. Ron Blakey. NAU.

7. Performance of CCSM3 Distribution of processors.
Coupler: Very few needed.
Atmosphere: Dependent on detail level.
Land: Few, always low detail.
Ocean: Dependent on detail level.
Ice: Somewhat higher than land.

9. Performance of Saguaro
Low Resolution
Saguaro 23 years per day, 36 processors.
UCAR 24 years per day, 64 processors.
Medium Resolution
Saguaro 8 years per day, 80 processors.
UCAR 4.5 years per day, 104 processors.
Permian Resolution
Saguaro 15 years per day, 36 processors.

10. Air Pressure at Ground Saguaro

11. Air Pressure at Ground UCAR

12. In the future… Community Climate System Model 4. Early Permian.
Release in June.
More detail.
Faster and Fully Parallel
Early Permian.