Twomey effect in subtropical stratocumulus clouds from UV depolarization lidar
Martin de Graaf (Royal Netherlands Meteorological Institute (KNMI), TU Delft - Atmospheric Remote Sensing)
Jessica Brown (Wageningen University & Research)
David Donovan (Royal Netherlands Meteorological Institute (KNMI))
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Abstract
Marine stratocumulus clouds are important climate regulators, reflecting sunlight over a dark ocean background. A UV-depolarization lidar on Ascension, a small remote island in the south Atlantic, measured cloud droplet sizes and number concentration using an inversion method based on Monte Carlo (MC) modelling of multiple scattering in idealised semiadiabatic clouds. The droplet size and number concentration weremodulated due to smoke from the African continent, measured by the same instrument.
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