By Zev Levin, William R. Cotton
This publication studies present wisdom at the courting among aerosols and precipitation achieving the Earth's floor. It incorporates a record of strategies which can aid to farther boost wisdom during this area.
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Extra info for Aerosol Pollution Impact on Precipitation A Scientific Review
E. the droplets approach a monodispersed distribution). This sequence of events is illustrated by the results of theoretical calculations shown in Fig. 7. Comparisons of cloud droplet size distributions measured a few hundred meters above the bases of non-precipitating warm cumulus clouds with droplet size distributions computed assuming growth by condensation for about 5 min show good agreement. The droplets produced by condensation during this time period extend only up to about 10 mm in radius.
2007). The variability in ice nuclei concentration is likely not a simple function of temperature but also depends on thermodynamical, dynamical and aerosol characteristics (DeMott et al. 1994). The activity of a particle as a condensation-freezing or a deposition nucleus depends not only on the temperature but also on the supersaturation of the ambient air. R. Cotton, S. Yuter Fig. 10 Ice nucleus concentration measurements versus ice supersaturation; temperatures are noted alongside each line.
Evaporating clouds also release sulphate particles that are somewhat larger than non-cloud processed aerosol because of the additional material deposited onto them in clouds (Radke and Hobbs 1969; Easter and Hobbs 1974; Hegg et al. 1980; Hegg and Hobbs 1981; Hoppel et al. 1986; Birmili et al. 1999; Feingold and Kriedenweis 2002). It has been estimated that $80% of sulphate mass globally is formed in the aqueous phase, and the remainder from the gas phase. As expected from the Kohler ¨ curves, larger sulphate particles serve more efficiently as CCN (Hegg 1985; Leaitch et al.
Aerosol Pollution Impact on Precipitation A Scientific Review by Zev Levin, William R. Cotton