PPT-Generating cloud drops from CCN

Wallace amp Hobbs 1977 Cloud Drops and Equilibrium Considerations review We discussed how to compute the equilibrium vapor pressure over a pure water drop or a solution droplet as a function of composition which is in turn dependent on the amount and nature of soluble material in the CCN and curvature . cloud. While the drops circulate through areas with different temperatures and humidity levels, they grow on and on in different ice layers. The hailstone freezes and melts alternatively when he move Formation of cloud droplets from supersaturated vapor. Growth of cloud droplets to raindrops in . O. (10 min). Growth of warm cloud droplets. Activated cloud droplets grow by . condensation . then . collection. Supercooled. Liquid . Water. Application . to Aircraft and Ground Icing Problems. Gregory Thompson, Roy Rasmussen, . Trude. . Eidhammer. WRF User’s Workshop 27 Jun 2012, Boulder, CO. Motivation. of Sea-Salt . Aerosols. Magdalena Anguelova. Bridging the Gap. October 30 - 31 , 1999. What are Aerosols?. Aerosols are minute stable particles, solid or liquid, suspended in the atmosphere.. SOURCE. :. www.geos.ed.ac.uk. /~. dstevens. /...DS_L3_Precipitation_development.ppt. Precipitation development;. Warm and Cold clouds. >0. °. C. <0. °. C. Last lectures from me…. Cloud droplet formation (micro-scales). ATM 419/563. Spring 2017. Fovell. 1. The C-C equation. The . Clausius-Clapeyron. (C-C) . equation reveals how saturation . vapor pressure (. e. s. ) varies . with temperature . T. :. …where . a. 1. Quick review. Drop growth by condensation is modeled as a process of diffusion of water vapor to the surface. The “driving force” is the difference between the vapor pressure of water over the droplet, and the vapor pressure of the environment. Condensation “activates” aerosol particles into drops . . condensation grows liquid droplets (initial stages) . . drop-drop collisions / coalescence create larger drops . . formation of rain in mature clouds (removes water from parcel, disrupts the process). n(D. ). , and fall speeds . v(D. ). , . net . vertical flux of drops (m. -2. s. -1. ). The “threshold diameter” has . v(D. th. ) = . w. . Smaller drops move up, larger ones move down.. The larger that . SO 254 – Spring 2017. LCDR Matt . Burich. How many cloud types can you name?. Take about 3 minutes…groups of 2 or 3. Naming Conventions…by type and altitude. Middle clouds . “alto”. Clouds with vertical development . Scott Braun. Goals of Meeting. Review 2012 campaign. Initial science results. Lessons learned. Prepare for 2013 campaign. Status of all instruments. Changes to aircraft operations for 2013. Revised strategies based upon lessons learned and changes from 2012 operations. Guest lecture by Prof. Kathleen . Schiro. 12 October 2020. Cloud Droplet Formation. Review of how condensation occurs. Curvature effect. Cloud condensation nuclei. Solute effect. 3.3 x 10. 5 . J/kg. 2.5 x 10. & Clouds. Earth-Atmosphere Energy Balance. The air is warmed by the surface. Rising “thermals” . of air that were in direct contact with the ground. Condensation of water in clouds. “Ideal . :. www.geos.ed.ac.uk. /~. dstevens. /...DS_L3_Precipitation_development.ppt. Precipitation development;. Warm and Cold clouds. >0. °. C. <0. °. C. Last lectures from me…. Cloud droplet formation (micro-scales).