Science in China Series D: Earth Sciences

, Volume 51, Issue 9, pp 1354–1360

Study of ozone “weekend effect” in Shanghai

  • WenYuan Tang
  • ChunSheng Zhao
  • FuHai Geng
  • Li Peng
  • GuangQiang Zhou
  • Wei Gao
  • JianMing Xu
  • XueXi Tie
Article
  • 178 Downloads

Abstract

Analysis of observed ozone data in 2006 from five monitoring sites (Xujiahui, Chongming, Baoshan, Pudong, Jinshan) in Shanghai reveals that ozone (O3) concentrations in Xujiahui are higher at weekends than those on weekdays, despite the fact that emissions of ozone precursor substances, such as oxides of nitrogen (NOx), carbon monoxide (CO) and volatile organic compounds (VOCs) are lower at weekends than those on weekdays. The possible chemical cause of ozone “weekend effect” is that NO2/NO ratio increases at weekends by 25.61% compared with those on weekdays. In addition, because of an average 12.13% reduction in NOx (NO + NO2) in the early morning (05:00–09:00) at weekends compared with that on weekdays, the ozone inhibition period ends 0.5 h earlier at weekends resulting in the longer duration of ozone accumulation and the higher ozone production rate. The rate of ozone production is a function of VOCs and NOx in the atmosphere. VOCs/NOx ratio in Xujiahui is 4.55 at weekends, and 4.37 on weekdays, belonging to the “NOx-limited”. The increasing VOCs/NOx ratio at weekends leads to ozone enhancement from 73 ppbv to 80 ppbv, which are consistent with ozone “weekend effect” in Xujiahui. Furthermore, combining with MICAPS cloud amount data, the fact that ozone “weekend effect” in Xujiahui weakens gradually along with the increasing of cloud amount indicates that ozone photochemical production leads to ozone “weekend effect” in Xujiahui of Shanghai.

Keywords

Shanghai ozone photochemical pollution “weekend effect” 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Qin Y, Zhao C S. Basis of Atmospheric Chemistry (in Chinese). Beijing: China Meteorology Press, 2004. 34Google Scholar
  2. 2.
    Zhou X J. The Change of Ozone in The Atmosphere of China and Its Influence to the Climatic Environment I (in Chinese). Beijing: China Meteorology Press, 1996. 23Google Scholar
  3. 3.
    Zhou X J. The Change of Ozone in The Atmosphere of China and Its Influence to the Climatic Environment II (in Chinese). Beijing: China Meteorology Press, 1997. 19Google Scholar
  4. 4.
    Zhou X J. Research on the interaction between lower atmosphere and ecosystem over Yangtze Delta region. Beijing: China Meteorology Press, 2004. 31Google Scholar
  5. 5.
    Zhao C S, Tie X X, Wang G L, et al. Analysis of air quality in Eastern China and its interaction with other regions of the world. J Atmos Chem, 2006, 55: 189–204CrossRefGoogle Scholar
  6. 6.
    Tie X X, Brasseur G P, Zhao C S, et al. Chemical characterization of air pollution in Eastern China and the Eastern United States. Atmos Environ, 2006, 40: 2607–2625CrossRefGoogle Scholar
  7. 7.
    Wang T, Cheung V T F, Vincent T F, et al. Ozone and related gaseous pollutants in the boundary layer of eastern China: Overview of the recent measurements at a rural site. Geophys Res Lett, 2001, 28(12): 2373–2376CrossRefGoogle Scholar
  8. 8.
    Ma J Z, Liu H L. Summertime tropospheric ozone over China simulated with a regional chemical transport model. 1. Model description and evaluation. J Geophys Res, 2002, 107(D22): 4660CrossRefGoogle Scholar
  9. 9.
    Ma J Z, Zhou X J, Hauglustaine D. Summertime tropospheric ozone over China simulated with a regional chemical transport model. 2. Source contributions and budget. J Geophysi Res, 2002, 107(D22): 4612CrossRefGoogle Scholar
  10. 10.
    Geng F, Zhao C S, Tang X, et al. Analysis of ozone and VOCs measured in Shanghai: A case study. Atmos Environt, 2007, 41(5): 989–1001CrossRefGoogle Scholar
  11. 11.
    Zhao C S, Peng L, Sun A D, et al. Numerical modeling of tropospheric ozone over Yangtze Delta region. J Environ Sci, 2004, 24(3): 525–533Google Scholar
  12. 12.
    Zheng X D, Chen Z Y, Cui H, et al. Characteristics of vertical zone distribution in the lower troposphere in the Yangtze River Delta at Lin’an in the spring of 2001. Sci China Ser D-Earth Sci, 2005, 48(9): 1184–1192CrossRefGoogle Scholar
  13. 13.
    Hu J L, Zhang Y H. Process Analysis of ozone formation in the Yangtze River Delta. Res Environ Sci, 2005, 18(2): 13–18Google Scholar
  14. 14.
    Xu X B, Lin W L, Wang T, et al. Long-term trend of tropospheric ozone over the Yangtze Delta Region of China. Adv Climate Change Res, 2006, 2(5): 211–216Google Scholar
  15. 15.
    Cleveland W S, Graedel T E, Kleiner B, et al. Sunday and workday variations in photochemical air pollutants in New Jersey and New York. Science, 1974, 186: 1037–1038CrossRefGoogle Scholar
  16. 16.
    Lebron F. A comparison of weekend-weekday ozone and hydrocarbon concentrations in the Baltimore-Washington metropolitan area. Atmos Environ, 1975, 9: 861–863CrossRefGoogle Scholar
  17. 17.
    Vukovich F M. The spatial variation of the weekday/weekend differences in the Baltimore area. J Air Waste Manag Ass, 2000, 50: 2067–2072Google Scholar
  18. 18.
    Elkus B, Wilson K R. Photochemical air pollution: Weekend/weekday differences. Atmos Environ, 1977, 11: 509–515CrossRefGoogle Scholar
  19. 19.
    Levitt S B, Chock D P. Weekday-weekend pollutant studies of the Los Angeles basin. J Air Poll Control Ass, 1976, 26: 1091–1092Google Scholar
  20. 20.
    Altshuler S, Arcado T D, Lawson D R, et al. Weekday vs. weekend ambient ozone concentrations: Discussion and hypotheses with focus on Northern California. J Air Poll Control Ass, 1995, 45: 967–972Google Scholar
  21. 21.
    Diem J E. Comparisons of weekday/weekend ozone: Importance of biogenic volatile organic compound emissions in the semi-arid southwest USA. Atmos Environ, 2000, 34: 3445–3451CrossRefGoogle Scholar
  22. 22.
    Pun B K, Seigneur C, White W. Data analysis for a better understanding of the weekday/weekend ozone and PM differences. Atmospheric and Environmental Research, Inc., San Ramon, CA 94583, 2001Google Scholar
  23. 23.
    Pryor S C, Steyn D G. Hebdomadal and diurnal cycles in ozone time series from the Lower Fraser Valley, B.C. Atmos Environ, 1995, 29: 1007–1019CrossRefGoogle Scholar
  24. 24.
    Bronninmann S, Neu U. Weekend-weekday differences of near-surface ozone concentrations in Switzerland for different meteorological conditions. Atmos Environ, 1997, 31: 1127–1135CrossRefGoogle Scholar
  25. 25.
    Pont V, Fontan J. Comparison between Weekend and Weekday Ozone Concentration in Large Cities in France. Atmos Environ, 2001, 35: 1527–1535CrossRefGoogle Scholar
  26. 26.
    National Research Council. Rethinking the Ozone Problem in Urban and Regional Air Pollution. Washington, D C: National Academy Press, 1991Google Scholar
  27. 27.
    Bower J S, Broughton G F, Dando M T, et al. Surface ozone concentrations in the U K in 1987–1988. Atmos Environ, 1989, 23: 2003–2016CrossRefGoogle Scholar
  28. 28.
    Gery M W, Crouse R R. User’s Guide for Executing OZIPR. Chemical Processes and Characterization Division, Atmospheric Research and Exposure Assessment Laboratory, US Environment Protection Agency, 1990Google Scholar
  29. 29.
    Fujita, E M, Stockwell W, et al. Weekend/weekday ozone observations in the South Coast Air Basin: Retrospective analysis of ambient and emissions data and refinement of hypotheses. Volume I—Executive Summary. National Renewable Energy Laboratory, Golden, CO 80401, 2000Google Scholar

Copyright information

© Science in China Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • WenYuan Tang
    • 1
  • ChunSheng Zhao
    • 1
  • FuHai Geng
    • 1
    • 2
  • Li Peng
    • 2
  • GuangQiang Zhou
    • 2
  • Wei Gao
    • 2
  • JianMing Xu
    • 2
  • XueXi Tie
    • 2
    • 3
  1. 1.Department of Atmospheric Science, School of PhysicsPeking UniversityBeijingChina
  2. 2.Atmospheric Chemistry Laboratory of Shanghai Meteorological BureauShanghaiChina
  3. 3.Atmospheric Chemistry DivisionNCARBoulderUSA

Personalised recommendations