Intercomparison of Nox,SO2,O3,and Ar

Intercomparison of Nox,SO2,O3,and Aromatic Hydrocarbons Measured by a Commercial DOAS System and Traditional Point Monit

Abstract： A field-based intercomparison study of a commercial Differential Optical Absorption Spectroscopy (DOAS) instrument (OPSIS AB, Sweden) and different point-sample monitoring techniques (PM, based on an air monitoring station, an air monitoring vehicle, and various chemical methods) was conducted in Beijing from October 1999 to January 2000. The mixing ratios of six trace gases including NO, NO2, SO2,O3, benzene, and toluene were monitored continuously during the four months. A good agreement between the DOAS and PM data was found for NO2 and SO2. However, the concentrations of benzene, toluene,and NO obtained by DOAS were significantly lower than those measured by the point monitors. The ozone levels monitored by the DOAS were generally higher than those measured by point monitors. These results may be attributed to a strong vertical gradient of the NO-O3-NO2 system and of the aromatics at the measurement site. Since the exact data evaluation algorithm is not revealed by the manufacturer of the DOAS system, the error in the DOAS analysis can also not be excluded. 作 者： 谢品华    刘文清    付强    王瑞斌    刘建国    魏庆农   作者单位： 谢品华,刘文清,刘建国,魏庆农(Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)

付强,王瑞斌(China National Environmental Monitoring Center,Beijing,100029) 

期 刊： 大气科学进展(英文版)  ISTICSCI   Journal： ADVANCES IN ATMOSPHERIC SCIENCES  年，卷(期)： 2004, 21(2)  分类号：   Keywords： Differential optical absorption spectroscopy    urban air pollution    intercomparison    remotesensing technique   

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