A Tale of Two Capitols

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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
• [phone] also 752 1120
• tacahill_at_ucdavis.edu
• http//delta.ucdavis.edu
• Detection and Evaluation of Long-range
  Transport of Aerosols

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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

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Major Species ?g/m3 (micrograms per cubic meter
of air)
Major Species (PM2.5) Washington 1992 (IMPROVE) Beijing 2001 (ACE-Asia)
Mass 19.2 ?g/m3 gt 51.5 ?g/m3
Ammonium Sulfate 10.1 ?g/m3 11.0 ?g/m3
Ammonium nitrate 2.2 ?g/m3 not available
Organic matter, Carbon soot 4.8 OC ?g/m3 ,1.2 ?g/m3 EC not available
Soil (non dust storm) 0.7 ?g/m3 40.5 ?g/m3 (129.2 ?g/m3 In 6 dust storms)
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Major Species ?g/m3 (micrograms per cubic meter
of air)
Major Species (PM2.5) Washington 1995 (IMPROVE) Beijing 2001 (ACE-Asia)
Mass 19.2 ?g/m3 gt 51.5 ?g/m3
Ammonium Sulfate 7.5 ?g/m3 11.0 ?g/m3
Ammonium nitrate 2.2 ?g/m3 not available
Organic matter, Carbon soot 4.6 OC ?g/m3 ,1.6 ?g/m3 EC not available
Soil (non dust storm) 0.89 ?g/m3 40.5 ?g/m3 (129.2 ?g/m3 In 6 dust storms)
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Trace metals ng/m3 ( 1/1000 ?g/m3)
Species (PM2.5) Washington 1992 (IMPROVE) Beijing 2001 (ACE-Asia)
Vanadium (oil combustion) 4.5 ng/m3 4.2 ng/m3
Lead (mostly autos? 12.6 ng/m3 4,323.6 ng/m3
Selenium, Mercury (coal combustion) 2.2 ng/m3 lt 1 ng/m3 27.1 ng/m3 232.5 ng/m3 (no std)
Copper, Zinc (industrial) 3.9 ng/m3 21 ng/m3 110.5 ng/m3, 439.3 ng/m3
Arsenic (industrial) 0.3 ng/m3 24.9 ng/m3
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Trace metals ng/m3 ( 1/1000 ?g/m3)
Species (PM2.5) Washington 1995 (IMPROVE) Beijing 2001 (ACE-Asia)
Vanadium (oil combustion) 4.3 ng/m3 4.2 ng/m3
Lead (mostly autos? 6.3 ng/m3 4,323.6 ng/m3
Selenium, Mercury (coal combustion) 2.3 ng/m3 lt 1 ng/m3 27.1 ng/m3 232.5 ng/m3 (no std)
Copper, Zinc (industrial) 4.8 ng/m3 19.4 ng/m3 110.5 ng/m3, 439.3 ng/m3
Arsenic (industrial) 0.83 ng/m3 24.9 ng/m3