Year round measurements of O3 and CO at a rural site near Beijing: variations in their correlations

Article English OPEN
Wang, Yuxuan ; Hao, Jiming ; Mcelroy, Michael B. ; Munger, J. William ; Ma, Hong ; Nielsen, Chris P. ; Zhang, Yuqiang (2011)

We examine seasonal variations of carbon monoxide (CO), ozone (O3), and their relationships observed over the course of 3 yr (2005–2007) at Miyun, a rural site 100 km north of Beijing. Monthly mean afternoon mixing ratios of CO have broad maxima in winter and a secondary peak in June. Monthly mean afternoon O3 shows a clear seasonal pattern with a major peak in June (85 ppb), a secondary peak in September (65 ppb) and minimum in winter (50–55 ppb). The seasonal cycles of O3 and CO are associated with seasonal changes in dominant synoptic pattern. Substantial interannual variability is found for CO which is attributed to the interannual variability of meteorology and emissions from biomass burning. The seasonality and magnitude of background CO and O3 derived at Miyun are consistent with observations at upwind remote continental sites. The O3–CO correlation slope is about 0.07 ppb ppb-1 on average in summer, significantly lower than the typical slope of 0.3 ppb ppb-1 reported for developed countries. The O3–CO correlation slope shows large gradients for different types of air masses (0.133 ± 0.017 ppb ppb-1 in aged urban pollution plumes and 0.047 ± 0.008 ppb ppb-1 in biomass burning plumes), suggesting that the conventional method of direct scaling the mean O3–CO slope by CO emissions to deduce O3 production rate is subject to large uncertainties if applied for China.DOI: 10.1111/j.1600-0889.2010.00464.x
  • References (45)
    45 references, page 1 of 5

    Appenzeller, C., Holton, J. R. and Rosenlof, K. H. 1996. Seasonal variation of mass transport across the tropopause. J. Geophys. Res. 101, 15071-15078.

    Chin, M., Jacob, D. J., Munger, J. W., Parrish, D.D. and Doddridge, B.G. 1994. Relationship of ozone and carbon monoxide over North America. J. Geophys. Res. 99(D7), 14565-14573.

    Cooper, O. R., Moody, J. L., Parrish, D. D., Trainer, M., Holloway, J. S. and co-authors. 2002. Trace gas composition of midlatitude cyclones over the western North Atlantic Ocean: a seasonal comparison of O3 and CO. J. Geophys. Res. 107(D7), doi:10.1029/2001JD000902.

    Ding, A. J., Wang, T., Thouret, V., Cammas, J.-P. and Ne´de´lec, P. 2008. Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program. Atmos. Chem. Phys. 8, 1-13.

    Draxler, R. R. and Hess, G.D. 1998. An overview of the HYSPLIT 4 modelling system for trajectories, dispersion, and deposition. Aust. Meterol. Mag. 47, 295-308.

    Fu, T.-M., Jacob, D. J., Palmer, P. I., Chance, K., Wang, Y. X. and co-authors. 2007. Space-based formaldehyde measurements as constraints on volatile organic compound emissions in East and South Asia. J. Geophys. Res. 112, D06312, doi:10.1029/2006JD007853.

    Gao, J., Wang, T., Ding, A. and Liu, C. 2005. Observations study of ozone and carbon monoxide at the summit of mount Tai (1534m a.s.l.) in central-eastern China. Atmos. Environ. 39, 4779-4791.

    GLOBALVIEW-CO. 2009. Cooperative Atmospheric Data Integration Project - Carbon Monoxide. CD-ROM, NOAA ESRL, Boulder, Colorado [Also available on Internet via anonymous FTP to, Path: ccg/co/GLOBALVIEW]

    Hirsch, R. M. and Gilroy, E. J. 1984. Methods of fitting a straight line to data: examples in water resources. Water Resour. Bull. 20, 705- 711.

    Jaffe, D. and Ray, J. 2007. Increase in surface ozone at rural sites in the western US. Atmos. Environ. 41(26), 5452-5463.

  • Metrics
    No metrics available
Share - Bookmark