Climate Effects of Geoengineering Using Cloud Seeding and Stratospheric Aerosols

I will discuss two geoengineering strategies: 1) production of aerosols in the middle atmosphere; and 2) increasing the reflectivity of marine clouds near the surface. A few results will be shown from coupled climate model simulations, suggesting that the geoengineering strategies can cool the planet, and increase sea ice. I will identify other possible consequences to the climate system as well, suggesting that there will be tradeoffs resulting from geoengineering. Much more research is needed to understand these tradeoffs.