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Air Quality Disparities: Beijing vs. Washington - A Comparative Analysis by Thomas A. Cahill

Explore the contrasting levels of PM10 aerosols in Beijing and Washington across time, as detailed by Thomas A. Cahill's research. Cahill's work highlights significant spatial and seasonal trends, emphasizing the impact of air quality regulations on sulfate haze levels in the US. The study also delves into long-range transport of aerosols and the influence of ACE-Asia on regional climatic and atmospheric chemical effects. Discover the evolution of pollution levels in these two capitals and the implications for environmental policy and public health.

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Air Quality Disparities: Beijing vs. Washington - A Comparative Analysis by Thomas A. Cahill

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  1. A Tale of Two Capitols – Beijing, PRC and Washington, USA Summary by Thomas A. Cahill, Professor of Physics (recalled) and Atmospheric Sciences (emeritus) and Head, DELTA* Group, University of California, Davis 95616 (530) 752 4674 also 752 1120 tacahill@ucdavis.edu http://delta.ucdavis.edu * Detection and Evaluation of Long-range Transport of Aerosols

  2. PM10 Mass • Beijing • July 2008 BBC data 129.4 g/m3 (note: no dust storms) • Washington • 1992 IMPROVE data 26.5 g/m3 • 1995 IMPROVE data 26.8 g/m3 References • Malm, W.C., Sisler, J.F., Huffman, D., Eldred, R.A. and Cahill, T.A.. Spatial and seasonal trends in particle concentration and optical extinction in the United States. 1994 Journal of Geophysical Research, VOL. 99, No. D1, 1347-1370, January 20, 1994 • Eldred, Robert A. and Thomas A. Cahill. Trends in elemental concentrations of fine particles at remote sites in the United States. 1994 Atmospheric Environment, Vol. 28, No. 5, pp. 1009-1019. • Note: 1992 was about the peak of the US regional sulfate haze prior to improvements from the Clean Air Act Amendments of 1991. • For ACE- Asia, Seinfeld, J.H., Carmichael, G.R., Arimoto, R, Conant, W. C., Brechtel, F. J., Bates, T. S., Cahill, T. A., Clarke, A.D., Flatau, B.J., Huebert, B.J., Kim, J., Markowicx, K.M., Masonis, S.J., Quinn, P.K., Russell, L.M., Russell, P.B., Shimizu, A., Shinozuka, Y., Song, C.H., Tang, Y., Uno, I., Vogelmann, A.M., Weber, R.J., Woo, J-H., Zhang, Y.ACE-Asia: Regional Climatic and Atmospheric Chemical Effects of Asian Dust and Pollution,Bulletin American Meteorological Society 85 (3): 367+ MARCH 2004

  3. Major Species g/m3 (micrograms per cubic meter of air)

  4. Major Species g/m3 (micrograms per cubic meter of air)

  5. Trace metals ng/m3 (= 1/1000 g/m3)

  6. Trace metals ng/m3 (= 1/1000 g/m3)

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