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1666309 
Journal Article 
Results of simultaneous measurements of carbon monoxide in the atmosphere and submicron aerosol in the surface layer over Beijing 
Wang, GC; Grechko, EI; Emilenko, AS; Dzhola, AV; Kopeikin, VM; Fokeeva, EV 
2001 
Yes 
Izvestiya, Atmospheric and Oceanic Physics
ISSN: 0001-4338
EISSN: 1531-8443 
37 
S1-S9 
WOS:000173072800001 
Data on surface concentrations of submicron aerosol and soot and data on total carbon monoxide over the whole thickness of the atmosphere are reported from measurements performed on a round-the-clock basis over northern Beijing during the autumns of 1992 and 1996-2000 and the summer of 1999. A very high correlation between surface concentrations of soot and submicron aerosol (rho = 0.9 for the autumns of 1992 and 1996-2000 and rho = 0.8 for the summer of 1999) is characteristic of Beijing. Similarly, a high correlation was found between the logarithm of the total carbon monoxide in the polluted air over the city and the surface concentration of submicron aerosol (daily average values). In comparison with other cities, high average levels of submicron aerosol concentration are characteristic of Beijing; nevertheless, the most probable concentrations do not exceed commonly accepted values. Elevated monthly averages of surface concentrations are caused by the occurrence of days with extremely high concentrations that significantly exceed acceptable values. These days were characterized by weak southerly winds and temperature inversions in the lower 300-m layer. A significant increase in concentrations of soot and aerosol was observed from 1992 to 1999; monthly averages of these concentrations almost doubled. In 2000, the content of soot and submicron aerosol in the surface air layer sharply decreased (by a factor of one and a half), probably due to the fact that the main sources of soot and aerosol in Beijing were converted from coal to gas. The total carbon monoxide in the atmosphere changed only slightly in 2000. The results measured in Beijing were correlated with the results measured in Moscow.