Accession Number:

AD0724046

Title:

Condensation Nuclei Measurements in an Urban Area,

Descriptive Note:

Corporate Author:

ISTITUTO DI FISICA DELL'ATMOSFERA ROME (ITALY)

Personal Author(s):

Report Date:

1970-03-09

Pagination or Media Count:

7.0

Abstract:

Systematic countings of condensation nuclei were carried out at IFA--Chemical Laboratory Rome, Italy with a Nolan-Pollak nuclei counter. The data were elaborated every month and show that 1 dry weather with an overcast sky is generally associated with a large number of nuclei on the contrary, clear sky is almost always associated with a smaller number of nuclei. This behaviour is explained by the fact that overcast sky corresponds to a subsidence situation, while clear sky is associated with strong winds, which cause air turbulence and, as consequences, air mixing and a decrease in the condensation nuclei number 2 during rain the condensation nuclei number is low due to the wash-out effect of the precipitation 3 a remarkable correlation between air relative humidity and condensation nuclei number was found. Author

Subject Categories:

  • Atmospheric Physics
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE