Radley Horton, Associate Research Scientist, Center for Climate Systems Research, Columbia University Earth Institute, shares his experience and perspective on key decisions made while working with the City of New York to mobilize scientists for a rapid assessment of the damage in the wake of Super Storm Sandy. He also discusses another project involving the loss of Arctic sea ice and its potential for effecting mid-latitude climate.
David Keith explains how solar geoengineering may enable a significant reduction in climate risks by partially offsetting climate change due to increasing greenhouse gases, however this emerging technology entails novel risks and uncertainties along with serious challenges to global governance. He provides a rough summary of the physics of solar geoengineering and present recent findings regarding (a) the climate’s response to radiative forcing by stratospheric aerosols, (b) methods of producing appropriate aerosol distributions, and (c) risks. In closing I will discuss the trade-off between solar geoengineering, emissions reductions and adaptation in climate policy.