Maritime-Continental drizzle contrasts in small cumuli

James G. Hudson, Seong Soo Yum

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

Continuous aircraft measurements of cloud condensation nuclei (CCN) were made during 16 summertime flights in eastern Florida. The air masses were divisible into maritime and continental regimes that respectively corresponded to wind direction - easterly (onshore) and westerly (offshore). Throughout these small cumulus clouds there were consistently higher concentrations of smaller droplets in the continental air. There was much more drizzle (diameter > 50 μm) in the maritime clouds where drizzle was associated with larger mean cloud droplet (2-50-μm diameter) sizes, higher concentrations of large cloud droplets, and greater amounts of cloud droplet liquid water. An apparent cloud droplet mean size threshold for the onset of drizzle was almost never exceeded in the continental clouds but was often exceeded in the maritime clouds, especially at higher altitudes. All together these results demonstrate that higher CCN concentrations suppressed drizzle.

Original languageEnglish
Pages (from-to)915-926
Number of pages12
JournalJournal of the Atmospheric Sciences
Volume58
Issue number8
DOIs
Publication statusPublished - 2001 Apr 15

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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