1. ATS 762: BIOSPHERE, CHEMISTRY, CLIMATE INTERACTIONS

2. BIOSPHERE-ATMOSPHERE IS TRADITIONALLY THIS: CHEMISTRY-CLIMATE IS TRADITIONALLY THIS: Cooling of Stratosphere

3. AN ATMOSPHERIC CHEMISTRY PERSPECTIVE… From UK initiative: QUEST Atmospheric Aerosols and Chemistry DMS, org

4. THE IPCC PERSPECTIVE… Figure 1.1: IPCC, 2001

5. BEACHON: www.essl.ucar.edu

6. BIOGEOCHEMICAL CYCLES Physical exchange, redox chemistry, biochemistry are involved Surface reservoirs Key Questions: how much of budget is in the atmosphere? land? ocean? are the transfer rates between the atmosphere- biosphere large? Important? how will human-scale perturbations affect the geological steady-state? Jacob, 1999