Accession Number : ADA019583

Title :   Aircraft Measurements of Aitken Nuclei in the Lower Stratosphere.

Descriptive Note : Final technical rept.,


Personal Author(s) : Podzimek,Josef ; Sedlacek,W. A. ; Haberl,J. B.

Report Date : 24 APR 1975

Pagination or Media Count : 54

Abstract : The purpose of this article is to evaluate the first AN measurements using the new GE AN counter in stratospheric conditions. The instrument briefly described in this article was flown on a WB-57F aircraft in 1974 up to an altitude of 20 km. The vertical profiles of AN concentrations, measured mainly over New Mexico and Texas, showed AN counts comparable with the previous balloon measurements in the tropopause (several hundred to 1,000 n/cc). However, in altitudes above 13 km, the measured AN concentrations were higher by one order of magnitude (30 n/cc) than the older data of Junge et. al. (1961). The flights over the Rocky Mountains and over Texas indicate a potentially strong influence that mountainous areas have on AN counts in the lower stratosphere. The measurements also showed the pollution of the lower stratosphere caused by aircraft emissions in the tropopause.

Descriptors :   *Stratosphere, *Aerosols, *Air pollution, Exhaust gases, New Mexico, Texas, Measurement, Airborne, Particles, Concentration(Composition), Nuclei, Sampling, Monitoring, Calibration, Particle size, Light scattering, Electrostatic precipitation, Charged particles, Mountains

Subject Categories : Atmospheric Physics
      Physical Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE