A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation
Abstract Inorganic nitrate production is critical in atmospheric chemistry that reflects the oxidation capacity and the acidity of the atmosphere. Here we use the oxygen anomaly of nitrate (Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − )) in high-time-resolved (3 h) aerosols to explore the chemical mechanisms of...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-06-01
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| Series: | npj Climate and Atmospheric Science |
| Online Access: | https://doi.org/10.1038/s41612-022-00273-3 |
| _version_ | 1811334293041971200 |
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| author | Yan-Lin Zhang Wenqi Zhang Mei-Yi Fan Jianghanyang Li Huan Fang Fang Cao Yu-Chi Lin Benjamin Paul Wilkins Xiaoyan Liu Mengying Bao Yihang Hong Greg Michalski |
| author_facet | Yan-Lin Zhang Wenqi Zhang Mei-Yi Fan Jianghanyang Li Huan Fang Fang Cao Yu-Chi Lin Benjamin Paul Wilkins Xiaoyan Liu Mengying Bao Yihang Hong Greg Michalski |
| author_sort | Yan-Lin Zhang |
| collection | DOAJ |
| description | Abstract Inorganic nitrate production is critical in atmospheric chemistry that reflects the oxidation capacity and the acidity of the atmosphere. Here we use the oxygen anomaly of nitrate (Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − )) in high-time-resolved (3 h) aerosols to explore the chemical mechanisms of nitrate evolution in fine particles during the winter in Nanjing, a megacity of China. The continuous Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) observation suggested the dominance of nocturnal chemistry (NO3 + HC/H2O and N2O5 + H2O/Cl−) in nitrate formation in the wintertime. Significant diurnal variations of nitrate formation pathways were found. The contribution of nocturnal chemistry increased at night and peaked (72%) at midnight. Particularly, nocturnal pathways became more important for the formation of nitrate in the process of air pollution aggravation. In contrast, the contribution of daytime chemistry (NO2 + OH/H2O) increased with the sunrise and showed a highest fraction (48%) around noon. The hydrolysis of N2O5 on particle surfaces played an important role in the daytime nitrate production on haze days. In addition, the reaction of NO2 with OH radicals was found to dominate the nitrate production after nitrate chemistry was reset by the precipitation events. These results suggest the importance of high-time-resolved observations of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) for exploring dynamic variations in reactive nitrogen chemistry. |
| first_indexed | 2024-04-13T17:05:39Z |
| format | Article |
| id | doaj.art-f3ec4a9549864595b0e09e21eb014de6 |
| institution | Directory Open Access Journal |
| issn | 2397-3722 |
| language | English |
| last_indexed | 2024-04-13T17:05:39Z |
| publishDate | 2022-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Climate and Atmospheric Science |
| spelling | doaj.art-f3ec4a9549864595b0e09e21eb014de62022-12-22T02:38:29ZengNature Portfolionpj Climate and Atmospheric Science2397-37222022-06-015111010.1038/s41612-022-00273-3A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formationYan-Lin Zhang0Wenqi Zhang1Mei-Yi Fan2Jianghanyang Li3Huan Fang4Fang Cao5Yu-Chi Lin6Benjamin Paul Wilkins7Xiaoyan Liu8Mengying Bao9Yihang Hong10Greg Michalski11Atmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyDepartment of Earth, Atmospheric and Planetary Sciences and Department of Chemistry, Purdue UniversityDepartment of Earth, Atmospheric and Planetary Sciences and Department of Chemistry, Purdue UniversityAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyDepartment of Earth, Atmospheric and Planetary Sciences and Department of Chemistry, Purdue UniversityAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyAtmospheric Environment Center, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science & TechnologyDepartment of Earth, Atmospheric and Planetary Sciences and Department of Chemistry, Purdue UniversityAbstract Inorganic nitrate production is critical in atmospheric chemistry that reflects the oxidation capacity and the acidity of the atmosphere. Here we use the oxygen anomaly of nitrate (Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − )) in high-time-resolved (3 h) aerosols to explore the chemical mechanisms of nitrate evolution in fine particles during the winter in Nanjing, a megacity of China. The continuous Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) observation suggested the dominance of nocturnal chemistry (NO3 + HC/H2O and N2O5 + H2O/Cl−) in nitrate formation in the wintertime. Significant diurnal variations of nitrate formation pathways were found. The contribution of nocturnal chemistry increased at night and peaked (72%) at midnight. Particularly, nocturnal pathways became more important for the formation of nitrate in the process of air pollution aggravation. In contrast, the contribution of daytime chemistry (NO2 + OH/H2O) increased with the sunrise and showed a highest fraction (48%) around noon. The hydrolysis of N2O5 on particle surfaces played an important role in the daytime nitrate production on haze days. In addition, the reaction of NO2 with OH radicals was found to dominate the nitrate production after nitrate chemistry was reset by the precipitation events. These results suggest the importance of high-time-resolved observations of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) for exploring dynamic variations in reactive nitrogen chemistry.https://doi.org/10.1038/s41612-022-00273-3 |
| spellingShingle | Yan-Lin Zhang Wenqi Zhang Mei-Yi Fan Jianghanyang Li Huan Fang Fang Cao Yu-Chi Lin Benjamin Paul Wilkins Xiaoyan Liu Mengying Bao Yihang Hong Greg Michalski A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation npj Climate and Atmospheric Science |
| title | A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation |
| title_full | A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation |
| title_fullStr | A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation |
| title_full_unstemmed | A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation |
| title_short | A diurnal story of Δ17O( $$\rm{NO}_{3}^{-}$$ NO 3 − ) in urban Nanjing and its implication for nitrate aerosol formation |
| title_sort | diurnal story of δ17o rm no 3 no 3 in urban nanjing and its implication for nitrate aerosol formation |
| url | https://doi.org/10.1038/s41612-022-00273-3 |
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