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Geofisica pura e applicata

, Volume 49, Issue 1, pp 217–224 | Cite as

Condensation nuclei and meteorological factors at Giza, Egypt

  • A. F. El Nadi
  • S. W. Banoub
Article
  • 18 Downloads

Summary

Measurements of the concentration of condensation nuclei, carried out, daily, every two hours with aNolan-Pollak photoelectric nucleus counter in the period 1957–1960, are analysed for the relation between the concentration and the meteorological elements. It was found that the concentration of condensation nuclei changes according to the following behaviour:
  1. 1)

    The concentration increases to a maximum at:a) relative humidity in the range 50–59%,b) temperature in the range 25.0–29.0°C,c) vapour pressure in the range 12.0–12.6 mm Hg.

     
  2. 2)

    The concentration increases with direct sun light and decreases with diffused light.

     
  3. 3)

    The concentration is low during calm weather, high wind speeds and wind directions S-SSW.

     
  4. 4)

    The concentration varies slightly with the form and amount of clouds present in the sky except the case in which all the sky is hidden.

     

Keywords

Relative Humidity Wind Speed Vapour Pressure Egypt Wind Direction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Istituto Geofisico Italiano 1961

Authors and Affiliations

  • A. F. El Nadi
    • 1
  • S. W. Banoub
    • 2
  1. 1.Assiout UniversityAssioutEgypt
  2. 2.Faculty of EngineeringEin Shams UniversityCairoEgypt

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