Aerosol effect on the mobility of cloud droplets

Ilan Koren, Orit Altaratz, Guy Dagan

Research output: Contribution to journalArticlepeer-review


Cloud droplet mobility is referred to here as a measure of the droplets' ability to move with ambient air. We claim that an important part of the aerosol effect on convective clouds is driven by changes in droplet mobility. We show that the mass-weighted average droplet terminal velocity, defined here as the `effective terminal velocity' (eta) and its spread (sigma eta) serve as direct measures of this effect. Moreover, we develop analytical estimations for eta and sigma eta to show that changes in the relative dispersion of eta (epsilon eta = sigma eta/eta) can serve as a sensitive predictor of the onset of droplet-collection processes.
Original languageEnglish
Article number104011
Number of pages10
JournalEnvironmental Research Letters
Issue number10
StatePublished - 14 Oct 2015


  • cloud aerosol interactions
  • cloud invigoration
  • droplet mobility
  • terminal velocity

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Public Health, Environmental and Occupational Health


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