The Productiveness of Fog Precipitation in Relation to the Cloud Droplet Spectrum

  1. Helmut Weickmann
  1. Johannes Grunow

Published Online: 18 MAR 2013

DOI: 10.1029/GM005p0110

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

Grunow, J. (1960) The Productiveness of Fog Precipitation in Relation to the Cloud Droplet Spectrum, 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/GM005p0110

Author Information

  1. Deutscher Wetterdienst, Meteorological Observatory Hohenpeissenberg, Germany

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:

  • Cloud droplet spectrum;
  • Measuring method;
  • Productiveness of fog precipitation;
  • Record and types of cloud droplet spectrum;
  • Water content

Summary

On Mount Hohenpeissenberg in Upper Bavaria (975 m NN) the atmospheric offer of fog precipitation is measured by a cylindric net of wires of 0.1 mm diameter, for which a nearly constant relation of deposit amount to wind velocity is found. The amount of deposited fog precipitation depends on (1) locality and exposition of the gage, and (2) weather situation. The efficiency of polar cold air, characterized by dominating small diameters of cloud droplets from 2 to 15 μ, is scanty. Increasing productiveness results, when maritime warm air masses from temperate or subtropical zones pass. The cloud droplet spectrum is then characterized by a broader range of 4 to 25 μ diameter, with a maximum frequency from 8 to 14 μ. The deposits are heaviest with amounts of 2 to 3 mm/hr when persistent cloud decks form on the windward side of the Alps. The air masses have then often degenerated by continental influences. The droplet spectrum indicates a wide range from 5 to 60 μ with a maximal frequent diameter of 12 to 18 μ