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[Effects of synoptic type on surface ozone pollution in Beijing]
Gui-qian Tang1, Xin Li, Xiao-ke Wang
1State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. tgq@dq.cern
Huan Jing Ke Xue= Huanjing Kexue
|April 3, 2010
Summary
Beijing
Area of Science:
- Atmospheric chemistry and air quality research.
- Meteorological influences on air pollution.
- Photochemical smog formation and dynamics.
Context:
- Urban ambient air quality in Beijing during summer and fall.
- Ozone (O) as a significant gaseous photochemical pollutant.
- Continuous air monitoring data from July to September 2008.
Purpose:
- To analyze the relationship between synoptic weather patterns and ozone concentrations.
- To investigate the meteorological factors driving high and low ozone episodes.
- To assess the predictability of photochemical pollution based on synoptic types.
Summary:
- High ozone episodes in Beijing are linked to pre-low cyclonic conditions with high temperatures and low humidity.
- Low ozone episodes correlate with pre-high anticyclonic conditions, characterized by low temperatures and north winds.
- Local circulations like mountain and valley winds influence diurnal ozone peaks, while synoptic types affect overall concentration and timing.
Impact:
- Understanding synoptic weather patterns is crucial for forecasting photochemical pollution in Beijing.
- Provides insights into the complex interplay of meteorological factors and ozone formation.
- Highlights the importance of regional air quality monitoring and analysis.
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