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Chemistry-Climate WG Meeting: Advances in CAM Development and Future Directions

Join us for the Chemistry-Climate WG meeting to discuss the latest developments in Chemistry-Climate models, including halogen chemistry, IPCC/community simulations, aerosol and cloud applications, and more. Explore the remaining issues and recommendations for model configurations and chemistry-climate simulations.

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Chemistry-Climate WG Meeting: Advances in CAM Development and Future Directions

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  1. Welcome!Chemistry-Climate WG Peter Hess Jean-Francois Lamarque Michael Prather

  2. Agenda Monday Afternoon • Developments in Chemistry in CAM • Halogen Chemistry • Discussion (Future Directions) • IPCC/Community Simulations • Cam with Chemistry Development Tuesday Morning • Presentations of General Interest Tuesday Afternoon (Joint Session with AMWG) • Update and Progress of CAM Development Research • New Boundary Layer/New Convection • Aerosol and Clouds in CAM4 Wednesday Morning (Joint Session with AMWG) • Aerosol and Cloud Applications

  3. WG Responsibilities 1) CCSM with chemistry • impacts of chemistry/aerosols on climate in a cost effective way 2) Chemistry Model within the CCSM • benchmark for simplified versions • effect of climate on chemistry/air quality • model-measurement comparison • short-term impact studies

  4. Timeline -February -October 2008, Components Assembled -June 2009, Model Released Implementation, Development Testing

  5. Chemistry for Climate Simulations

  6. Remaining Issues (WG recommendations) • Aerosol Configuration • Emissions • Historical Runs • Future Runs • Generation of Input Chemistry/Aerosols(?) • What Model to Use? • Middle Atmosphere/WACCM • CAM4 (Frozen or Preliminary), CAM3.5 • Emissions • Future • Past

  7. Chemistry within the CCSM

  8. Remaining Issues Model Release June 2009 • Configurations • CAM4 • NCEP • Other • Simulations with new dynamics and configurations • Chemistry • Stratospheric Chemistry • Tropospheric Halogen Chemistry • Aerosol Configuration • Secondary Organic Aerosols • Computational Expense • New components

  9. Meeting Goals • Towards CAM4 • Recommendations for model configurations • What can you contribute • Towards the IPCC • What is essential in terms of chemistry-climate • What can we do about it? • Agenda for meeting in Breckenridge

  10. Chemistry model in CCSM • MOZART4 Incorporated into CCSM • CAM and MOZART routines checked against each other • Chemical Mechanism • MZ4 mechanism in place. • Simple input of fixed chemical oxidants • Query functions so chemical mechanism easy to change. • Additions to mechanism for SOA formation (Heald) • Dry deposition • Wesley deposition in place (MZ4) • Wesley deposition input into CLM • Updated scheme using information from CLM (LAI, stomatal resistance) • Photolysis • Fast TUV in place • Update to Prather Fast-J • Use of sophisticated cloud overlap (Neu) • Consistency between CAM and CHEM in treatment of aerosols • Combined radiation/aerosol calculation

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