Characterizations of Aerosol Distribution over Beijing Region in Autumn 2004
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The finemode aerosol concentration and the size distributions from the ground to 7 km over Beijing in 2004 are analyzed， by means of the data within and above the planetary boundary layer from the optical spectrometer probes mounted on a light aircraft. The results show that aerosol particles over the Beijing area had a uniform distribution below the mixed layer， decreased with height significantly between 1 to 2 km， and decreased slowly with height above 2 km. At higher levels， the number concentration of aerosols was smaller than 200 cm-3 with less variation. When there existed inversion， finemode aerosols often formed in the“accumulation layer”near the top of the boundary layer. Under highpressure conditions， the number concentration of aerosols near the ground was about 500 to 800 cm-3; while in a weak lowpressure case， the number concentration of aerosols near the ground was about 8000/cm3.The observed finemode aerosol size distributions show a singlepeaked mode.
Keywords:
Project Supported:
Clc Number:
You are thevisitors
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.