Characteristics of Aerosol Types in Beijing and the Associations with Air Pollution from 2004 to 2015
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Sites
2.2. AERONET Data
2.3. Aerosol Classification Methods
3. Results and Discussion
3.1. Optical Characteristics of Different Aerosol Types
3.1.1. Seasonal Variation of Different Aerosol Optical Properties
3.1.2. Annual Variation of Different Aerosol Optical Properties
3.1.3. Optical Properties of Different Aerosol Types
3.2. Comparison of Aerosol Types in Urban and Suburban Regions
3.2.1. Seasonal Variation of Different Aerosol Types in BJ and XH
3.2.2. Average Proportion of Aerosol Types over 12 Years in BJ and XH
3.2.3. Annual Variation of Different Aerosol Types in BJ and XH
3.3. Correlation between AQI and Aerosol Types
3.3.1. The Incidence of each Aerosol Type at Specific AQI
3.3.2. The Relationship between Aerosol Types and AQI
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sites | Lng E/Lat N | Observation Time | Sample Number |
---|---|---|---|
Beijing (Urban) | 116.381/39.977 | September 2004–December 2015 | 2336 |
Xianghe (Suburban) | 116.962/39.754 | September 2004–December 2015 | 2554 |
AQI | Dust | Mixed | Highly-Absorbing | Moderately-Absorbing | Slightly-Absorbing | Scattering | Total | Dominant Aerosol Type % |
---|---|---|---|---|---|---|---|---|
Good (0–50) | 6 | 52 | 5 | 25 | 21 | 14 | 123 | 42 |
Moderate (51–100) | 11 | 35 | 2 | 23 | 40 | 12 | 123 | 33 |
Unhealthy for Sensitive Groups (101–150) | 18 | 36 | 9 | 30 | 33 | 31 | 157 | 23 |
Unhealthy (151–200) | 12 | 8 | 2 | 13 | 29 | 28 | 92 | 31 |
Very Unhealthy (201–300) | 2 | 2 | 2 | 15 | 24 | 6 | 51 | 47 |
Hazardous (>300) | 1 | 3 | 1 | 5 | 14 | 5 | 29 | 48 |
total | 50 | 136 | 21 | 111 | 161 | 96 | 575 | 28 |
AQI | Dust | Mixed | Highly-Absorbing | Moderately-Absorbing | Slightly-Absorbing | Scattering | Total | Dominant Aerosol Type % |
---|---|---|---|---|---|---|---|---|
Good (0–50) | 1 | 5 | 24 | 32 | 15 | 2 | 79 | 41 |
Moderate (51–100) | 7 | 17 | 46 | 43 | 38 | 19 | 170 | 27 |
Unhealthy for Sensitive Groups (101–150) | 8 | 23 | 17 | 40 | 50 | 20 | 158 | 32 |
Unhealthy (151–200) | 8 | 16 | 11 | 21 | 36 | 14 | 106 | 34 |
Very Unhealthy (201–300) | 5 | 4 | 9 | 17 | 25 | 5 | 65 | 38 |
Hazardous (>300) | 0 | 3 | 3 | 7 | 18 | 6 | 37 | 49 |
total | 29 | 68 | 110 | 160 | 182 | 66 | 615 | 30 |
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Ou, Y.; Zhao, W.; Wang, J.; Zhao, W.; Zhang, B. Characteristics of Aerosol Types in Beijing and the Associations with Air Pollution from 2004 to 2015. Remote Sens. 2017, 9, 898. https://doi.org/10.3390/rs9090898
Ou Y, Zhao W, Wang J, Zhao W, Zhang B. Characteristics of Aerosol Types in Beijing and the Associations with Air Pollution from 2004 to 2015. Remote Sensing. 2017; 9(9):898. https://doi.org/10.3390/rs9090898
Chicago/Turabian StyleOu, Yang, Wenhui Zhao, Junqian Wang, Wenji Zhao, and Bo Zhang. 2017. "Characteristics of Aerosol Types in Beijing and the Associations with Air Pollution from 2004 to 2015" Remote Sensing 9, no. 9: 898. https://doi.org/10.3390/rs9090898