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[Correlation between acidic materials and acid deposition in Beijing during 1997-2011]
Yuan-yuan Chen1, He-zhong Tian, Dong-yan Yang
1Beijing Municipal Environmental Monitoring Center, Beijing 100048, China. 214151318@qq.com
Huan Jing Ke Xue= Huanjing Kexue
|August 7, 2013
Summary
Air pollution in Beijing is linked to fossil fuel combustion and local emissions. Motor vehicle emissions significantly increase nitrate concentrations, impacting acid deposition.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
- Pollution Control
Context:
- Analyzed Beijing's air quality data (1997-2011) considering economic development and energy mix.
- Examined correlations between acid deposition precursors, acidic materials, and precipitation.
Purpose:
- Assess environmental quality improvement performance.
- Provide scientific support for environmental protection policies.
Summary:
- Significant correlations between NO2, NOx, and SO2 indicate fossil fuel combustion as the source of atmospheric nitrogen and sulfur.
- Acidic pollutants primarily stem from local Beijing emissions.
- No clear correlation between wet deposition (S, N) and atmospheric SO2/NOx suggests influence from surrounding regions.
- Nitrate (NO3-) concentration correlates with motor vehicle numbers, highlighting their contribution.
Impact:
- Informs environmental quality assessment and policy-making for Beijing.
- Identifies key pollution sources and regional transport dynamics affecting acid deposition.
- Underscores the role of motor vehicles in air quality degradation.
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