PPT-Precipitation as a driver of cloud droplet concentration va

Photograph Tony Clarke VOCALS REx flight RF07 Robert Wood University of Washington Dave Leon and Jeff Snider University of Wyoming Radiative impact of cloud droplet concentration variations. Photograph: Tony Clarke, VOCALS . REx. flight RF07. Robert Wood. University of Washington. with help/data from Dan Grosvenor, Daniel McCoy, Chris . Terai. , Matt . Lebsock. , Dave Leon, Jeff Snider, Tony Clarke. Robert Wood. University of Washington. W. ith contributions . from . Eowyn. Baughman, Dan . Grosvenor, Daniel McCoy, Chris . Terai. , Matt . Lebsock. , Dave Leon, Jeff Snider, Tony . Clarke, . Duli. Photograph: Tony Clarke, VOCALS . REx. flight RF07. Robert Wood. University of Washington. “Background” cloud droplet concentration critical for determining aerosol indirect effects. Quaas. et al., AEROCOM . Robert Wood. University of Washington. Radiative. “forcing” components. Cloud effects. Direct . Twomey. Mixed ph.. Semi-dir 2. nd. AIE. t. cld. .  . N. d. rainrate. increases. Kubar. , T., D. L. Hartmann, and R. Wood, 2009: Understanding the importance of microphysics . and macrophysics . for warm rain in marine low clouds: Part I. Satellite observations. . Robert Wood, University of Washington. w. ith Ryan Eastman, Daniel McCoy, Daniel Grosvenor (University of Washington); Matt . Lebsock. (JPL). “Background” (minimum imposed) cloud droplet concentration influences aerosol indirect effects. . Photograph: Tony Clarke, VOCALS . REx. flight RF07. Robert Wood. University of Washington. with Rhea George, Chris . Terai. , Dave Leon, Jeff Snider. or. . Control of cloud droplet concentration in marine stratocumulus clouds. Photograph: Tony Clarke, VOCALS . REx. flight RF07. Robert Wood. University of Washington. with help/data . from Chris . Terai. , Dave Leon, Jeff Snider. Radiative. impact of cloud droplet concentration variations. Robert Wood, Atmospheric Sciences,. University of Washington. Motivation. Aerosols can potentially influence earth’s radiation budget both by direct interaction with sunlight (aerosol . direct . effect), and also by altering cloud radiative properties (aerosol . Photograph: Tony Clarke, VOCALS . REx. flight RF07. Robert Wood. University of Washington. with help/data . from Chris . Terai. , Dave Leon, Jeff Snider. Radiative. impact of cloud droplet concentration variations. Control of Cloud Droplet Concentration in Marine Stratocumulus Clouds Photograph: Tony Clarke, VOCALS REx flight RF07 Robert Wood University of Washington with help/data from Chris Terai , Dave Leon, Jeff Snider Control of Cloud Droplet Concentration in Marine Stratocumulus Clouds Photograph: Tony Clarke, VOCALS REx flight RF07 Robert Wood University of Washington with help/data from Chris Terai , Dave Leon, Jeff Snider about 1000 m/48 hrs. Thus, they usually evaporate quickly upon leaving the cloud mass. . For it to fall as a raindrop the cloud droplet must get bigger. One raindrop = about 1 million cloud droplets, . of . low clouds . to . aerosols. Robert . Wood, Atmospheric . Sciences,. University of Washington. Motivation. Aerosol impacts on clouds are not simply explained by . Twomey’s. arguments. Changes in .