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This project focuses on advancing carbon cycle modeling to improve climate change projections. Working groups collaborate to analyze simulations, address limitations, and lobby for relevant IPCC scenarios. Additions to the CCSM3 model aim to include dust/iron, reactive nitrogen, and all aerosols for climate feedback analysis. Challenges include computer resources and software assistance for developing complex codes.
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BGC WG Plans (short term)(2005-2006) • Emphasis on coupled carbon work • CSM1.0—coupled carbon cycledone • OCMIP’, CASA’ (Fung, Doney et al.) • CCSM3.0—coupled carbon cycle (T31 x3) • C4MIP-Phase I (land/atmos histfuture) • CLM-CN (Thornton) spin up done • CASA’ (Fung/Hoffman) spin up started • Phase II: (land/ocean/atmos) • OCMIP’, CASA’ (Fung, Hoffmann, Doney) • Ocean ecosystem, CLM-CN (Thornton,Doney, Moore)
BGC WG (2006-2009) • Goal of WG meetings: • Help decide which carbon scenarios will be in next IPCC through lobbying • Make sure we are set up to do them • Try to analyze runs to be sure that basic ‘physics’ is correct • CCSM3—add on dust/iron (need computer time) • CCSM3—add on reactive nitrogen (need FV) • CCSM3—add on all aerosols to include climate feedback • (more ideas in BGC-white paper) • INCITE? T85 versions of CCSM3 simulations
Problems: • Computer time • Software engineering help • PI limitations (developing state of the art codes, analyzing)