Estimates of Raindrop Collection Efficiencies in Electrified Clouds

  1. Helmut Weickmann
  1. G. B. Moore and
  2. B. Vonnegut

Published Online: 18 MAR 2013

DOI: 10.1029/GM005p0291

Physics of Precipitation: Proceedings of the Cloud Physics Conference, Woods Hole, Massachusetts, June 3-5, 1959

Physics of Precipitation: Proceedings of the Cloud Physics Conference, Woods Hole, Massachusetts, June 3-5, 1959

How to Cite

Moore, G. B. and Vonnegut, B. (1960) Estimates of Raindrop Collection Efficiencies in Electrified Clouds, in Physics of Precipitation: Proceedings of the Cloud Physics Conference, Woods Hole, Massachusetts, June 3-5, 1959 (ed H. Weickmann), American Geophysical Union, Washington D. C.. doi: 10.1029/GM005p0291

Author Information

  1. Arthur D. Little, Inc., Cambridge, Mass.

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 1 JAN 1960

Book Series:

  1. Geophysical Monograph Series

Book Series Editors:

  1. Waldo E. Smith

ISBN Information

Print ISBN: 9780875900056

Online ISBN: 9781118668931

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Keywords:

  • Effects of electric field;
  • Electrified clouds;
  • Formation of rain;
  • Raindrop collection;
  • Thunderstorms, New Mexico

Summary

Observations of thunderstorms from the summit of Mt. Withington, New Mexico, with a sensitive 3 em radar indicate heavy rainfalls from electrified clouds a very short time after the initial detection of a radar echo. Estimates of the drop collection efficiency necessary to fit the observed time sequence give values of 200 to 500% depending on the assumed liquid water content of the cloud. These deduced values for raindrops in electrified clouds are 4 to 10 times greater than the mean collection efficiencies determined by Kinzer and Cobb for drops in the absence of an electric field. It is suggested that electrification in clouds may greatly enhance the accretion and coalescence processes and thus can be a causative factor in the formation of precipitation.