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Early evolution of the largest-sized droplets in maritime cumulus clouds

✍ Scribed by Jason H. Lowenstein; Alan M. Blyth; R. Paul Lawson

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
209 KB
Volume
136
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

Droplet size distributions (DSDs) measured within a distance of approximately 1 km above the base of shallow maritime cumulus clouds during the Rain in Cumulus over the Ocean (RICO) field campaign are compared with results of a condensation and stochastic coalescence model, run in the framework of a closed parcel. New measurements of cloud droplets in the critical size range of 30 to 100 µm are presented from the 2D‐S probe. Observations are also presented of the large‐size tail of the sub‐cloud aerosol size distribution measured by the forward‐scattering spectrometer probe. Results show that droplet growth in this region is dominated by condensation, and the large‐size tail of the observed DSDs can be explained with the observed sub‐cloud particles, including giant and ultra‐giant aerosols. Copyright © 2010 Royal Meteorological Society

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