Clouds without supersaturation

Markku Kulmala (), Ari Laaksonen, Robert J.Charlson and Pekka Korhonen
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Markku Kulmala: University of Helsinki
Ari Laaksonen: University of Helsinki
Robert J.Charlson: University of Helsinki
Pekka Korhonen: University of Helsinki

Nature, 1997, vol. 388, issue 6640, 336-337

Abstract: Abstract Traditional Köhler theory1 describes the equilibrium vapour-pressure relationship between liquid solution particles and humid air. Here we present the concept of multiphase-multicomponent Köhler theory, which reveals that stable cloud droplets of size 1-10 μm could exist in air with a relative humidity of less than 100%. This may explain the occurrence of persistent large-droplet fogs or smogs such as previously existed in London and which are now found in various heavily polluted locations, near the exits of chimneys and in the plumes of volcanoes.

Date: 1997
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DOI: 10.1038/41000

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