Geoengineering Edwin K. Schneider George Mason University and COLA

How does the climate system respond to changing conditions (big changes). – Test of understanding – Unintended consequences? – Makes a good story Must use complex models of the coupled atmosphere-ocean-land system

Example (complete) Amazon Deforestation in a CGCM: effect on mean climate and climate variability – Pioneered by Shukla and collaborators in the early 1990’s in AGCM (specified SST) – No CGCM simulations until mid-2000’s (Schneider and collaborators, 2006 unpublished).

4 CFS Global and Annual Mean 2m Air Temperature Red: Control Black: Deforest

5 CFS Annual Mean 2m Air Temperature Difference

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Geoengineering Scenarios Deforestation, desertification Changing atmospheric opacity Changing cloud properties Change sea ice albedo Drop nuclear weapon into hurricane Change topography Meteorite impact Move Buffalo a little north