Impacts of enhanced new-particle growth events above urban roughness sublayer on cloud condensation nuclei
New-particle formation (NPF) events are frequently observed in urban environments, yet their occurrence and climate effects are still in question. We analyzed the physical and chemical processes during the new-particle growth (NPG) at the ground and 260 m based on measurements on the 325-m tower in the megacity of Beijing, China. Our results provide evidence for stronger NPG aloft in city, mainly due to the higher production of sulfuric acid aloft, and the downwards transport of newly formed particles from the upper atmospheric boundary layer. The particle growth aloft is promoted by the higher relative humidity, facilitating gas-to-particle partitioning, especially of nitrate. Therefore, higher particle concentrations accompanied by stronger hygroscopicity lead to >20% higher NPG-induced cloud condensation nuclei aloft, demonstrating the importance of vertical differences in NPF for a better understanding of the climate effect in urban areas.
Authors
- Markku Kulmala (ORCID: https://orcid.org/0000-0003-3464-7825)
- Qiaozhi Zha (ORCID: https://orcid.org/0000-0001-6301-7086)
- Fei Hu (ORCID: https://orcid.org/0000-0001-7416-3548)
- Jian Zhao (ORCID: https://orcid.org/0000-0002-4894-9587)
- Wei Du (ORCID: https://orcid.org/0000-0001-7890-3099)
- Douglas R. Worsnop (ORCID: https://orcid.org/0000-0002-8928-8017)
- Yele Sun (ORCID: https://orcid.org/0000-0003-2354-0221)
- Zhanqing Li (ORCID: https://orcid.org/0000-0001-6737-382X)
- Lubna Dada (ORCID: https://orcid.org/0000-0003-1105-9043)
- Runlong Cai (ORCID: https://orcid.org/0000-0002-6630-0896)
- Tom Kokkonen (ORCID: https://orcid.org/0000-0002-4804-7516)
- Xueshun Chen (ORCID: https://orcid.org/0000-0002-4708-1149)
- Jing Cai (ORCID: https://orcid.org/0000-0003-4480-6498)
- Libo Zhou (ORCID: https://orcid.org/0000-0002-6195-7362)
- Federico Bianchi (ORCID: https://orcid.org/0000-0003-2996-3604)
- Veli‐Matti Kerminen (ORCID: https://orcid.org/0000-0002-0706-669X)
- Fangqun Yu (ORCID: https://orcid.org/0000-0001-8862-4835)
- Zifa Wang (ORCID: https://orcid.org/0000-0002-7062-6012)
- Yuying Wang (ORCID: https://orcid.org/0000-0001-9762-8563)
- Yingjie Zhang (ORCID: https://orcid.org/0000-0002-3397-0244)
- Qingqing Wang (ORCID: https://orcid.org/0000-0003-2627-9866)
- Pingqing Fu (ORCID: https://orcid.org/0000-0001-6249-2280)
- Weiqi Xu
- Yu Shi (ORCID: https://orcid.org/0009-0005-5749-515X)
Institutions
- University of Helsinki (FI)
- Tianjin University (CN)
- Chinese Academy of Sciences (CN)
- Nanjing University of Information Science and Technology (CN)
- Paul Scherrer Institute (CH)
- Beijing Forestry University (CN)
- University at Albany, State University of New York (US)
- Aerodyne Research (US)
- Earth System Science Interdisciplinary Center (US)
- Institute of Atmospheric Physics (CN)
- University of Maryland, College Park (US)
- Beijing University of Chemical Technology (CN)
- Nanjing University (CN)
Publication Details
- Journal
- One Earth
- Published
- 2024-12-31
- DOI
- https://doi.org/10.1016/j.oneear.2024.12.005
- Citations
- 2
- Primary Topic
- Atmospheric chemistry and aerosols
- Type
- article
- Field-Weighted Citation Impact
- 0.75
Funders
- Association of Community Cancer Centers
- National Natural Science Foundation of China
- Academy of Finland
- Chinese Academy of Sciences
- Ministry of Science and Technology of the People's Republic of China
- Jenny ja Antti Wihurin Rahasto