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： 謝品華    劉文清    付強(qiáng)    王瑞斌    劉建國    魏慶農(nóng)   作者單位： 謝品華,劉文清,劉建國,魏慶農(nóng)(Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)

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

期 刊： 大氣科學(xué)進(jìn)展(英文版)  ISTICSCI   Journal： ADVANCES IN ATMOSPHERIC SCIENCES  年，卷(期)： 2004, 21(2)  分類號：   Keywords： Differential optical absorption spectroscopy    urban air pollution    intercomparison    remotesensing technique   

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