Understanding atmospheric processes: insights from the comparison between Beijing and Hyytiälä

作者：Markku Kulmala, Du Wei, Xinran Zhang, Tinghan Zhang, Men Xia, Yuzheng Wang, Zehao Zou, Feixue Zheng, Yusheng Zhang, Chen Yang, Jin Wu, Yiran Li, Qiaozhi Zha, Chao Yan, Weihang Feng, Zongcheng Wang, Chenjie Hua, Jiali Xie, Wei Ma, Yishuo Guo, Xin Chen, Tingyu Liu, Jinwen Li, Hongyu Pang, Guanwei Zhao, Kaiyun Chen, Zhixin Zhao, Wenxin Zhong, Shanshan Gao, Wenjun Zhang, Yuan Qi, Qi Lu, Tuukka Petäjä, Nina Sarnela, Ilona Ylivinkka, Diego Aliaga, Runlong Cai, Myriam Agrò, Lauri Ahonen, Pauliina Schiestl‐Aalto, Santeri Tuovinen, Jing Cai, Joni Kujansuu, Giancarlo Ciarelli, Yafang Cheng, Aijun Ding, Kaspar Rudolf Dällenbach, Lubna Dada, Douglas R. Worsnop, Federico Bianchi, Jingkun Jiang, Yongchun Liu, Veli‐Matti Kerminen, Tom Kokkonen · 发表于：npj Clean Air · 年份：2025 · DOI：10.1038/s44407-025-00020-x · 被引用次数：5 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Atmospheric Ozone and Climate

Abstract Besides primary emissions, transport and chemical production of particles in the atmosphere are crucial for both air quality and climate. We performed continuous measurements of meteorological conditions, concentrations of trace gases, oxidants and condensable vapors as well as basic characteristics of clusters, ions and aerosol particles in Hyytiälä (a forestry site), Finland, and Beijing (an urban site), China, from 2018 to 2022. Regarding air pollution and as sources of climate-active constituents, Hyytiälä and Beijing represent contrasting locations, motivating a detailed comparison between the two locations. We show our main findings on such comparison for selected variables, and over different time scales. Our results provide strong evidence that NPF is associated with sulphuric acid and highly oxygenated organic molecules (HOMs) in Hyytiälä, while in Beijing NPF is associated with sulphuric acid dimers indicative of sulfuric acid-base (ammonia/amines) clustering. The median particle growth rates were quite similar at the two sites (4–6 nm/h), although their dependence on particle size differed. Our results demonstrate the importance of continuous and comprehensive atmospheric observations and illustrate that we can learn much by comparing such measurements between two sites with different emission and pollution characteristics.