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Unformatted text preview: formation process no T =-( )+ = G 4Rp33vLln S 4Rp2 S ppsat < ; ; > ; ~ S 1 subsaturated G 0 G R p ; droplet cannot grow > ; ; S 1 supersaturated for a critical R p , < ; G 0 droplet grows R p * = , critical radius size of droplet at equilibrium Significant point clouds can only grow if aerosols with R p > R p * are in ! atmosphere Determining R p *: = Set G Rp 0 *= ( )= ( ) Rp 2vLkTln S 2MRTLln S A higher the atmospheric saturation will reduce the necessary R p * Kelvin Equation ( ), In a curved surface situation water droplet molecules are packed less , -. densly and have less intra attraction than the flat surface case . Molecules then have an easier time escaping a curved surface...
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- Winter '10