Observation of atmospheric nitrous acid with DOAS in Beijing, China  

作　　者：QIN Min XIE Pin-hua LIU Wen-qing LI Ang DOU Ke FANG Wu LIU Jian-guo ZHANG Wei-jun 

机构地区：[1]Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei230031, China

出　　处：《Journal of Environmental Sciences》2006年第1期69-75,共7页环境科学学报（英文版）

基　　金：TheK eyProjectofChineseA cadem yofSciences (N o.K JCX 2-SW -H08)andtheH i-TechResearchandD evelopm entProgram (863)ofChina(No.2002A A641020)

摘　　要：Measurements of nitrous acid （HONO） and nitrogen dioxide （NO2） in Beijing City have been performed by means of a developed differential optical absorption spectroscopy （DOAS） system based on photodiode array （PDA）, during the autumn of 2004. HONO and NO2 were simultaneously identified by their characteristic absorption bands in the spectral region between 337 nm and 372 nm with high sensibility and time resolution. The concentrations of HONO exhibit obviously diurnal variation with a nocturnal maximum and a daytime minimum. The highest HONO value up to 11.8 μg/m^3 was observed during the night of 2/3 September. Possible sources of the observed HONO were discussed. Good correlation to NO2 indicates that NO2 is a main source component. The measurement also shows direct emission of HONO is an imnortant source in strongly polluted urban area.Measurements of nitrous acid （HONO） and nitrogen dioxide （NO2） in Beijing City have been performed by means of a developed differential optical absorption spectroscopy （DOAS） system based on photodiode array （PDA）, during the autumn of 2004. HONO and NO2 were simultaneously identified by their characteristic absorption bands in the spectral region between 337 nm and 372 nm with high sensibility and time resolution. The concentrations of HONO exhibit obviously diurnal variation with a nocturnal maximum and a daytime minimum. The highest HONO value up to 11.8 μg/m^3 was observed during the night of 2/3 September. Possible sources of the observed HONO were discussed. Good correlation to NO2 indicates that NO2 is a main source component. The measurement also shows direct emission of HONO is an imnortant source in strongly polluted urban area.

关 键 词：atmospheric measurements HONO NO2 DOAS SOURCE 

分 类 号：X51[环境科学与工程—环境工程]