globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2006716117
论文题名:
High concentration of ultrafine particles in the Amazon free troposphere produced by organic new particle formation
作者: Zhao B.; Shrivastava M.; Donahue N.M.; Gordon H.; Schervish M.; Shilling J.E.; Zaveri R.A.; Wang J.; Andreae M.O.; Zhao C.; Gaudet B.; Liu Y.; Fan J.; Fast J.D.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:41
起始页码: 25344
结束页码: 25351
语种: 英语
英文关键词: Aerosol ; Amazon ; Extremely low volatility organic compounds ; New particle formation ; Troposphere
Scopus关键词: sulfuric acid ; Article ; autooxidation ; bioaccumulation ; concentration (parameter) ; controlled study ; dimerization ; new particle formation ; priority journal ; quantum chemistry ; room temperature ; secondary organic aerosol ; simulation ; thermodynamics ; troposphere ; ultrafine particulate matter
英文摘要: The large concentrations of ultrafine particles consistently observed at high altitudes over the tropics represent one of the world's largest aerosol reservoirs, which may be providing a globally important source of cloud condensation nuclei. However, the sources and chemical processes contributing to the formation of these particles remain unclear. Here we investigate new particle formation (NPF) mechanisms in the Amazon free troposphere by integrating insights from laboratory measurements, chemical transport modeling, and field measurements. To account for organic NPF, we develop a comprehensive model representation of the temperature-dependent formation chemistry and thermodynamics of extremely low volatility organic compounds as well as their roles in NPF processes. We find that pure-organic NPF driven by natural biogenic emissions dominates in the uppermost troposphere above 13 km and accounts for 65 to 83% of the column total NPF rate under relatively pristine conditions, while ternary NPF involving organics and sulfuric acid dominates between 8 and 13 km. The large organic NPF rates at high altitudes mainly result from decreased volatility of organics and increased NPF efficiency at low temperatures, somewhat counterbalanced by a reduced chemical formation rate of extremely low volatility organic compounds. These findings imply a key role of naturally occurring organic NPF in high-altitude preindustrial environments and will help better quantify anthropogenic aerosol forcing from preindustrial times to the present day. © 2020 National Academy of Sciences. All rights reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163999
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Zhao, B., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Shrivastava, M., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Donahue, N.M., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States, Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, United States, Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh, PA 15213, United States, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Gordon, H., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom; Schervish, M., Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, United States, Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Shilling, J.E., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Zaveri, R.A., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Wang, J., Center for Aerosol Science and Engineering, Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, United States; Andreae, M.O., Multiphase Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany, Scripps Institution of Oceanography, University of California San Diego, San Diego, CA 92093, United States, Department of Geology and Geophysics, King Saud University, Riyadh, 11451, Saudi Arabia; Zhao, C., School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China, Chinese Academy of Sciences Center for Excellence in Comparative Planetology, University of Science and Technology of China, Hefei, 230026, China; Gaudet, B., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Liu, Y., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Fan, J., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Fast, J.D., Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, United States

Recommended Citation:
Zhao B.,Shrivastava M.,Donahue N.M.,et al. High concentration of ultrafine particles in the Amazon free troposphere produced by organic new particle formation[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(41)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhao B.]'s Articles
[Shrivastava M.]'s Articles
[Donahue N.M.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zhao B.]'s Articles
[Shrivastava M.]'s Articles
[Donahue N.M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhao B.]‘s Articles
[Shrivastava M.]‘s Articles
[Donahue N.M.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.