Fig. 1. Schematic diagram of the experimental measurement device

Fig. 2. Analysis results of system stability and sensitivity

Fig. 3. Real-time measurement of OAC and number concentration of the ambient aerosol at 1 064 nm

Fig. 4. Effect of particle diameter on light absorption during the process of particles size growth

Fig. 5. Diurnal variation trends of the OAC and air quality in hazy, sunny and rainy weather conditions

Fig. 6. Diurnal variation trend of particle size spectrum in hazy (a), sunny (b) and rainy (c) weather conditions