Accession Number:

ADA036504

Title:

Assessment of Atmospheric Condensation Nuclei Associated with Jet Aircraft Traffic.

Descriptive Note:

Annual rept. May 76-Apr 77,

Corporate Author:

WYOMING UNIV LARAMIE DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s):

Report Date:

1977-04-01

Pagination or Media Count:

12.0

Abstract:

Measurement of condensation nuclei CN in the size range r or 0.01 micrometers by balloon-borne detectors from a number of stations suggests the following a CN profiles concentration vs altitude to 30km are somewhat uniform globally with typically high approximately 1000cc concentrations in the troposphere and typically low approximately 10cc concentrations in the stratosphere. b The troposhere appears to serve as a CN source for the stratosphere. c CN occuring in tropospheric layers are partially volatile at 150C. d A CN layer observed in the stratosphere at 22km was apparently due to the jet engine emissions of a high flying aircraft. In addition, larger particles r or 0.15 micrometers in the stratospheric sulfate layer have continued to decay uniformly following an injection apparently due to a volcanic eruption in October 1974.

Subject Categories:

  • Atmospheric Physics
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE