Physics
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3303802m&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 3, CiteID L03802
Physics
5
Atmospheric Processes: Clouds And Cloud Feedbacks, Atmospheric Processes: Global Climate Models (1626, 4928), Atmospheric Processes: Precipitation (1854), Atmospheric Processes: Turbulence (4490)
Scientific paper
Effects from turbulence-induced fluctuations in water vapor saturation on cloud droplet growth are examined using a Brownian diffusion model. The model predicts diffusive broadening of the droplet size distribution, tempered by enhanced evaporation-induced drift of droplets to smaller size from vapor depletion, and approach to a stationary condition (Weibull distribution) determined by the balance between size-space diffusion and drift. Monte Carlo simulations of the approach to the stationary limit and of the distribution itself are presented and compared favorably with observation. A key turbulence parameter required by the kinetic potential theory of drizzle formation is estimated using the new results.
Liu Yangang
McGraw Robert
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