Factors Influencing O3 Concentration in Traffic and Urban Environments: A Case Study of Guangzhou City
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area and Measurement Data
2.2. Analysis Approaches
3. Results and Discussion
3.1. Temporal Variations of NO2 and O3
3.1.1. Daily Variations
3.1.2. Weekly Variations
3.2. Influencing Factors
3.2.1. Synergistic Variation of O3 and NO2
3.2.2. Pearson Correlation and Stepwise Regression Analyses
3.2.3. Case Study
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Impact Factors | Daytime | Nighttime |
---|---|---|
Temperature (°C) | 0.047 ** | 0.057 ** |
Wind speed (m/s) | −0.082 ** | −0.057 ** |
Daily precipitation (mm) | −0.101 ** | −0.006 |
Vehicle speed (m/s) | −0.111 ** | −0.111 ** |
Travel-time ratio | 0.150 ** | 0.129 ** |
NO2 (μg/m3) | −0.220 * | −0.153 ** |
RH (%) | −0.495 ** | −0.226 ** |
Solar radiation (J/m2) | 0.448 ** | 0.279 ** |
Model | Daytime | p | Nighttime | p |
---|---|---|---|---|
Beta Value | Beta Value | |||
Temperature (°C) | 0.386 | 0.000 | 0.207 | 0.000 |
Wind speed (m/s) | −0.076 | 0.000 | −0.124 | 0.000 |
Daily precipitation (mm) | 0.092 | 0.000 | 0.036 | 0.037 |
Vehicle speed (m/s) | −0.077 | 0.000 | −0.063 | 0.000 |
NO2 (μg/m3) | −0.407 | 0.000 | −0.611 | 0.000 |
RH (%) | −0.578 | 0.000 | −0.389 | 0.000 |
Solar radiation (J/m2) | - | - | 0.182 | 0.000 |
Period | Station | O3 (μg/m3) | NO2 (μg/m3) | Travel-Time Ratio | Solar Radiation (KJ/m2) | RH (%) | |||
---|---|---|---|---|---|---|---|---|---|
Day Time | Night Time | Day Time | Night Time | Day Time | Night Time | ||||
Sunny days | HS | 97.43 | 52.95 | 54.28 | 79.05 | 1.14 | 1.03 | 17,627.04 | 64.71% |
JY | 94.70 | 63.45 | 48.80 | 63.66 | 1.25 | 1.06 | |||
LH | 102.31 | 45.88 | 38.87 | 79.34 | - | - | |||
Cloudy days | HS | 37.30 | 21.15 | 52.34 | 53.10 | 1.21 | 1.05 | 10,300.89 | 75.08% |
JY | 42.90 | 27.86 | 46.16 | 48.26 | 1.29 | 1.08 | |||
LH | 41.70 | 25.75 | 36.99 | 41.59 | - | - |
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Liu, T.; Sun, J.; Liu, B.; Li, M.; Deng, Y.; Jing, W.; Yang, J. Factors Influencing O3 Concentration in Traffic and Urban Environments: A Case Study of Guangzhou City. Int. J. Environ. Res. Public Health 2022, 19, 12961. https://doi.org/10.3390/ijerph191912961
Liu T, Sun J, Liu B, Li M, Deng Y, Jing W, Yang J. Factors Influencing O3 Concentration in Traffic and Urban Environments: A Case Study of Guangzhou City. International Journal of Environmental Research and Public Health. 2022; 19(19):12961. https://doi.org/10.3390/ijerph191912961
Chicago/Turabian StyleLiu, Tao, Jia Sun, Baihua Liu, Miao Li, Yingbin Deng, Wenlong Jing, and Ji Yang. 2022. "Factors Influencing O3 Concentration in Traffic and Urban Environments: A Case Study of Guangzhou City" International Journal of Environmental Research and Public Health 19, no. 19: 12961. https://doi.org/10.3390/ijerph191912961