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COSP Implementation in CAM/CCSM: Enabling Comparative Analysis of Tropical Warm Pool Reflectivity

This document details the implementation of the Cloud Observing Satellite Simulator (COSP) within the Community Atmosphere Model (CAM) and the Community Climate System Model (CCSM). It provides insights into the achieved milestones, including COSP v1.3 and its operational integration with CAM4/CCSM4. The document outlines tasks for the upcoming summer, such as enhancing compatibility with various compilers and testing the implementation against published results. It also highlights future comparative analyses of COSP results with other major modeling centers, like NASA and GFDL.

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COSP Implementation in CAM/CCSM: Enabling Comparative Analysis of Tropical Warm Pool Reflectivity

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  1. 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

  2. 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 using CAM I/O • - Compiles and runs with lahey or pgi fortran compiler on linux machine • Orbital sub-sampling and advanced namelist control for CFMIP experiments and ROSES09 project implemented • COSP and CAM-compatible COSP code on a branch in the CCSM repository • (https://svn-ccsm-models.cgd.ucar.edu/cam1/branches/cosp_cam4_1_01/). • STILL TO DO THIS SUMMER: • Make compatible with compilers on production platforms (e.g., bluefire, franklin) • Test implementation vs. published offline results (e.g., Zhang et al. (2010 JGR)) • Make compatible with CAM5 physics • Compare COSP implementation and results with other modeling centers (NASA, GFDL, UKMet Office) • Generate curtain output? • Put CAM modifications for COSP onto trunk in the CCSM repository • Production runs for CFMIP5 (w/Haiyan Teng, Gary Strand)

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