Variations of atmospheric aerosol concentration and size distribution with time and altitude in the boundary layer
Abstract
The atmospheric aerosol number concentration and size distribution were measured at six levels (50, 100, 150, 200, 250 and 300 m) on the Beijing 325 m meteorological tower by means of an optical particle counter. From the measured value of the concentrationNz and according to the expression $$N_Z = N_0 e^{ - {\rm Z}/H_p } $$ , the value of aerosol scale heightHP was determined by using a least square method. An analysis shows that there are significant variations of aerosol concentration and size distribution in relation to time and altitude. The average size distribution for each level can be described by $$\frac{{dN}}{{dr}} = ar^b e^{ - cr} $$ , where the parameters vary with the altitude.
- Publication:
-
Advances in Atmospheric Sciences
- Pub Date:
- May 1985
- DOI:
- 10.1007/BF03179756
- Bibcode:
- 1985AdAtS...2..243Y
- Keywords:
-
- Aerosols;
- Air Pollution;
- Altitude;
- Atmospheric Boundary Layer;
- Particle Size Distribution;
- Atmospheric Attenuation;
- Diurnal Variations;
- Particle Density (Concentration);
- Aerosol Particle;
- Atmospheric Aerosol;
- Aerosol Concentration;
- Aerosol Size Distribution;
- Meteorological Tower