Academic Journal
The effect of COVID-19 restrictions on atmospheric new particle formation in Beijing
| العنوان: | The effect of COVID-19 restrictions on atmospheric new particle formation in Beijing |
|---|---|
| المؤلفون: | C. Yan, Y. Shen, D. Stolzenburg, L. Dada, X. Qi, S. Hakala, A.-M. Sundström, Y. Guo, A. Lipponen, T. V. Kokkonen, J. Kontkanen, R. Cai, J. Cai, T. Chan, L. Chen, B. Chu, C. Deng, W. Du, X. Fan, X.-C. He, J. Kangasluoma, J. Kujansuu, M. Kurppa, C. Li, Y. Li, Z. Lin, Y. Liu, Y. Lu, W. Nie, J. Pulliainen, X. Qiao, Y. Wang, Y. Wen, Y. Wu, G. Yang, L. Yao, R. Yin, G. Zhang, S. Zhang, F. Zheng, Y. Zhou, A. Arola, J. Tamminen, P. Paasonen, Y. Sun, L. Wang, N. M. Donahue, F. Bianchi, K. R. Daellenbach, D. R. Worsnop, V.-M. Kerminen, T. Petäjä, A. Ding, J. Jiang, M. Kulmala |
| المصدر: | Atmospheric Chemistry and Physics, Vol 22, Pp 12207-12220 (2022) |
| بيانات النشر: | Copernicus Publications, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Physics LCC:Chemistry |
| مصطلحات موضوعية: | Physics, QC1-999, Chemistry, QD1-999 |
| الوصف: | During the COVID-19 lockdown, the dramatic reduction of anthropogenic emissions provided a unique opportunity to investigate the effects of reduced anthropogenic activity and primary emissions on atmospheric chemical processes and the consequent formation of secondary pollutants. Here, we utilize comprehensive observations to examine the response of atmospheric new particle formation (NPF) to the changes in the atmospheric chemical cocktail. We find that the main clustering process was unaffected by the drastically reduced traffic emissions, and the formation rate of 1.5 nm particles remained unaltered. However, particle survival probability was enhanced due to an increased particle growth rate (GR) during the lockdown period, explaining the enhanced NPF activity in earlier studies. For GR at 1.5–3 nm, sulfuric acid (SA) was the main contributor at high temperatures, whilst there were unaccounted contributing vapors at low temperatures. For GR at 3–7 and 7–15 nm, oxygenated organic molecules (OOMs) played a major role. Surprisingly, OOM composition and volatility were insensitive to the large change of atmospheric NOx concentration; instead the associated high particle growth rates and high OOM concentration during the lockdown period were mostly caused by the enhanced atmospheric oxidative capacity. Overall, our findings suggest a limited role of traffic emissions in NPF. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1680-7316 1680-7324 |
| Relation: | https://acp.copernicus.org/articles/22/12207/2022/acp-22-12207-2022.pdf; https://doaj.org/toc/1680-7316; https://doaj.org/toc/1680-7324 |
| DOI: | 10.5194/acp-22-12207-2022 |
| URL الوصول: | https://doaj.org/article/e2efd964ae7d498395e5364e024f0b54 |
| رقم الانضمام: | edsdoj.2efd964ae7d498395e5364e024f0b54 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16807316 16807324 |
|---|---|
| DOI: | 10.5194/acp-22-12207-2022 |