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The driving factors of new particle formation and growth in the polluted boundary layer
Authors
Lauri R. Ahonen
Antonio Amorim
+77 more
Rima Baalbaki
Andrea Baccarini
Urs Baltensperger
Paulus S. Bauer
Lisa Beck
David Bell
Federico Bianchi
Sophia Brilke
Ken Carslaw
Dexian Chen
Randall Chiu
Joachim Curtius
Lubna Dada
António Dias
Josef Dommen
Neil M. Donahue
Jonathan Duplissy
Imad El Haddad
Henning Finkenzeller
Richard C. Flagan
Olga Garmash
Hamish Gordon
Armin Hansel
Xu Cheng He
Victoria Hofbauer
Christopher R. Hoyle
Changhyuk Kim
Jasper Kirkby
Theodore K. Koenig
Markku Kulmala
Andreas Kürten
Houssni Lamkaddam
Janne Lampilahti
Chuan Ping Lee
Katrianne Lehtipalo
Zijun Li
Huajun Mai
Vladimir Makhmutov
Hanna E. Manninen
Ruby Marten
Serge Mathot
Roy L. Mauldin
Bernhard Mentler
Ugo Molteni
Wei Nie
Antti Onnela
Eva Partoll
Tuukka Petäjä
Joschka Pfeifer
Veronika Pospisilova
Lauriane L.J. Quéléver
Matti Rissanen
Siegfried Schobesberger
Simone Schuchmann
Mario Simon
Dominik Stolzenburg
Yuri Stozhkov
Christian Tauber
Yee Jun Tham
António Tomé
Miguel Vazquez-Pufleau
Rainer Volkamer
Andrea C. Wagner
Robert Wagner
Mingyi Wang
Yonghong Wang
Lena Weitz
Daniela Wimmer
Paul M. Winkler
Douglas R. Worsnop
Yusheng Wu
Mao Xiao
Chao Yan
Penglin Ye
Qing Ye
Qiaozhi Zha
Xueqin Zhou
Publication date
1 January 2021
Publisher
Doi
Cite
Abstract
Publisher Copyright: © 2021 Mao Xiao et al.New particle formation (NPF) is a significant source of atmospheric particles, affecting climate and air quality. Understanding the mechanisms involved in urban aerosols is important to develop effective mitigation strategies. However, NPF rates reported in the polluted boundary layer span more than 4 orders of magnitude, and the reasons behind this variability are the subject of intense scientific debate. Multiple atmospheric vapours have been postulated to participate in NPF, including sulfuric acid, ammonia, amines and organics, but their relative roles remain unclear. We investigated NPF in the CLOUD chamber using mixtures of anthropogenic vapours that simulate polluted boundary layer conditions. We demonstrate that NPF in polluted environments is largely driven by the formation of sulfuric acid-base clusters, stabilized by the presence of amines, high ammonia concentrations and lower temperatures. Aromatic oxidation products, despite their extremely low volatility, play a minor role in NPF in the chosen urban environment but can be important for particle growth and hence for the survival of newly formed particles. Our measurements quantitatively account for NPF in highly diverse urban environments and explain its large observed variability. Such quantitative information obtained under controlled laboratory conditions will help the interpretation of future ambient observations of NPF rates in polluted atmospheres.Peer reviewe
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