Current Climate Model Development Projects

Ongoing Development PROJECTS and SOFTWARE

• SciDAC Collaborative Development of the CCSM, is a six laboratory project to advance and accelerate the development of the CCSM.  Our group is currently heavily involved with the atmospheric code (CAM3), the land model (CLM3), the river transport model and the biogeochemical aspects of ocean and atmosphere.
• Parallel Community Climate Model, Version 2.1, September 1995. A new implementation of CCM3.6 based on the 2-D parallel decomposition is available on request.
• Parallel Climate Model, in a Distributed Computing Environment. Currently adapting atmospheric components in collaboration with researchers at NCAR.
• Parallel Climate Model Ensemble Calculations, on the IBM SP. We are providing support for Warren Washington's group in managing the many, long runs and adapting the program to run efficently.
• ACPI-Avant Garde: Climate System Model Software Engineering, A new project with a multi-lab, multi-agency team to create a modular, performance-portable Climate System Model. Pat Worley and John Drake are participating in the CSM-SW Working group and John is coordinating the DOE effort with Ian Foster (ANL) for the atmospheric models. We are also attending some of the National Modeling Infrastructure meetings.
• Regional Climate Prediction, An ORNL LDRD project in 1999, developed some new methods for Regional Climate Prediction and Analysis.

Performance Evaluation PROJECTS for Climate Modeling

• Parallel Spectral Transform Shallow Water Model, Version 4.0, January 1995. Authored by P. H. Worley and I. T. Foster.
• COWPOKE - Climate, Ocean, Weather Parallel Object KErnels, A parallel MPI/OpenMP collection of F90 modules encapsulating distributed data structures (with transposition between structures) and mathematical operations defined on fields and grids.

Some Interesting RESEARCH Proposals

• ``Performance Portability for Coupled Atmosphere-Ocean General Circulation Models.'' Single source management of climate models will require the use of source translation tools and parallel programming conventions to achieve good performance on a variety of computational platforms. This proposal develops the necessary tools and techniques to realize high performance on massively parallel and vector supercomputers.
• ``New Methods for Global Atmospheric Dynamics on Parallel Computers.'' Three novel numerical methods are being developed for the dynamical core of a General Circulation Model (GCM). Two involve the semi-Lagrangian transport method. The other involves a high order local spectral approximaiton.
• ``Long Term Climate Simulations Using an Adaptable Virtual Machine.'' This seeks to support the development of climate models in general computing environments like HARNESS. Many of the required tools used by a climate model are viewed as "plug-ins" to the virtual machine. Checkpointing and restarting, fault-tolerance as well as coupling mechanisms with other climate components can be treated this way. The result will be a capability for long running climate simulations in a dynmacally changing computing environment.