Measurements of nighttime nitrate radical concentrations in the atmosphere by long-path differential optical absorption spectroscopy |
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| Authors: | Li Suwen Liu Wenqing Xie Pinhua Li Ang Qin Min Dou Ke |
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| Affiliation: | Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences, Hefei 230031,Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences, Hefei 230031,Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences, Hefei 230031,Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences, Hefei 230031,Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences, Hefei 230031,Key Laboratory of Environmental Optical & Technology, Anhui Institute of Optics & Fine Mechanics,Chinese Academy of Sciences, Hefei 230031 |
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| Abstract: | The long-path differential optical absorption spectroscopy (LP-DOAS) technique was developed to measurenighttime atmospheric nitrate radical (NO3) concentrations. An optimized retrieval method, resulting in a smallresidual structure and low detection limits, was developed to retrieve NO3. The time series of the NO3 concentrationwere collected from 17 to 24 March, 2006, where a nighttime average value of 15.8 ppt was observed. The interferingfactors and errors are also discussed. These results indicate that the DOAS technique provides an essential tool forthe quantification of NO3 concentration and in the study of its effects upon nighttime chemistry. |
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| Keywords: | nitrate radical long-path differential optical absorption spectroscopy detection limits errors |
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