Bidirectional Turbulent Fluxes of Fog at a Subtropical Montane Cloud Forest Covering a Wide Size Range of Droplets

Abstract Size-resolved turbulent fluxes of fog droplets are investigated above a subtropical montane cloud forest in Taiwan. By integrating an aerosol spectrometer into eddy-covariance set-up, we measure droplet number and liquid water size range particles with diameters ranging from 0.25 $${\upmu }\!\mathrm{m}$$ μ m to 17.3 . We find two flux-direction changes within this range: downward flux occurs for accumulation-mode aerosols between 0.83 , upward hydrated 1.1 2.4 again activated 3 The distributions can be modelled by trimodal log-normal distribution, the modes correlate different directions. formation three establishment respective directions explained combining Köhler theory on basis measured ion concentrations transport droplets. Finally, combined analysis distributions, infer relevant processes development dissolving during various phases life cycles events.