COSP implementation in CAM/CCSM
This document discusses the current status and achievements of the Cloud Feedback Model Intercomparison Project (COSP) implemented within the Community Atmosphere Model (CAM) and the Community Climate System Model (CCSM). Key milestones include the release of COSP v1.3 and its integration with CAM4/CCSM4, enabling quantitative cloud comparisons with satellite observations. Insights from reflected histograms of the Tropical Warm Pool CAM and CloudSat will enhance our understanding of cloud properties and feedbacks. Future work aims to ensure compatibility with CAM5 physics and to test implementations against offline results.
COSP implementation in CAM/CCSM
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Presentation Transcript
COSP implementation in CAM/CCSM Example of comparisons that COSP will enable: Tropical Warm Pool CAM (left) and CloudSat-observed (right) reflectivity histograms Jennifer E. Kay (jenkay@ucar.edu), NCAR CFMIP/COSP implementation contact with help/advice from Brian Eaton, John Truesdale, Andrew Gettelman (NCAR) Yuying Zhang, Steve Klein, Jim Boyle (LLNL) below CloudSat detection threshold below CloudSat detection threshold
What is a cloud? COSP diagnostics will enable quantitative cloud comparisons with satellite observations.
Current Status of COSP within CAMhttp://www.cgd.ucar.edu/cms/jenkay/cosp/cosp.htm • MILESTONES ACHIEVED: • - COSP v1.3 (production version released June 25, 2010) implemented in-line within CAM4/CCSM4 • - Compiles and runs on multiple platforms (linux, bluefire, franklin) • Orbital sub-sampling and advanced namelist control for CFMIP experiments and ROSES09 project implemented • COSP and CAM-compatible COSP code on the CAM/CCSM trunk. • IN PROGRESS: • Test implementation vs. published offline results (Yuying Zhang, Steve Klein LLNL) • Make compatible with CAM5 physics (Jen Kay) • CCSM4/CAM4 production runs for CFMIP5 (Ben Sanderson, Gary Strand CCR NCAR)
