ATMOSPHERIC AEROSOLS BETWEEN 700 AND 3000 m ABOVE SEA LEVEL. PART III. A STUDY OF THE EFFECTS OF ATMOSPHERIC FINE STRUCTURE CHARACTERISTICS ON THE VERTICAL DISTRIBUTION OF AEROSOLS.
Final technical rept. Jan 68-Jan 69,
FRAUNHOFER-GESELLSCHAFT GARMISCH-PARTENKIRCHEN (WEST GERMANY)
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The report presents an extensive body of observational data and a preliminary evaluation of the data. The mean vertical mass exchange coefficient between 700 and 1800 m and 1800 and 3000 meters were computed from measurements of RaB concentration at three levels. Incremental exchange coefficients of small, vertical adjoining layers usually 100 m thickness between 700 and 1800 m were determined from aerological sounding of particle concentration from electrical conductivity measurements. The exchange coefficients are related to the mean lapse rates, stability energy and maximum local lapse rates in inversions. The effect of air mass changes, heat of condensation and wind shear are discussed. Lapse rates during the measurements ranged from 0.3c100 meters to 1.1c100. Computed exchange coefficients vary from 0 to 1000 gcmsec. The relation between temperature gradient and exchange coefficient shows considerable scatter, especially in the 800-1800 meters region. The region from 1800-3000 meters shows less scatter. Regression lines show a change of slope at lapse rates of about -0.2c100 meters at the lower levels and at about 0.5c100 at the higher region. Author
- Atmospheric Physics