What is a good measure of "fast" or "slow" when discussing the impact of aerosol injections on the development of a growing cloud? I suggest simple criteria for answering this question, based on a combination of global and local water vapor balance approximations. This results in a compact expression for a characteristic time scale. While approximate, such relaxation time is simple to calculate and has a transparent physical meaning. Several illustrations using realistic scenarios for aerosol loading and updraft speed are discussed.
AGU Fall Meeting Abstracts
- Pub Date:
- December 2007
- 0305 Aerosols and particles (0345;
- 0320 Cloud physics and chemistry