NO at low concentration can enhance the formation of highly oxygenated biogenic molecules in the atmosphere

Autor(en)

Wei Nie, Chao Yan, Liwen Yang, Pontus Roldin, Yuliang Liu, Alexander L. Vogel, Ugo Molteni, Dominik Stolzenburg, Henning Finkenzeller, Antonio Amorim, Federico Bianchi, Joachim Curtius, Lubna Dada, Danielle C. Draper, Jonathan Duplissy, Armin Hansel, Xu Cheng He, Victoria Hofbauer, Tuija Jokinen, Changhyuk Kim, Katrianne Lehtipalo, Leonid Nichman, Roy L. Mauldin, Vladimir Makhmutov, Bernhard Mentler, Andrea Mizelli-Ojdanic, Tuukka Petäjä, Lauriane L.J. Quéléver, Simon Schallhart, Mario Simon, Christian Tauber, António Tomé, Rainer Volkamer, Andrea C. Wagner, Robert Wagner, Mingyi Wang, Penglin Ye, Haiyan Li, Wei Huang, Ximeng Qi, Sijia Lou, Tengyu Liu, Xuguang Chi, Josef Dommen, Urs Baltensperger, Imad El Haddad, Jasper Kirkby, Douglas Worsnop, Markku Kulmala, Neil M. Donahue, Mikael Ehn, Aijun Ding

Abstrakt

The interaction between nitrogen monoxide (NO) and organic peroxy radicals (RO₂) greatly impacts the formation of highly oxygenated organic molecules (HOM), the key precursors of secondary organic aerosols. It has been thought that HOM production can be significantly suppressed by NO even at low concentrations. Here, we perform dedicated experiments focusing on HOM formation from monoterpenes at low NO concentrations (0 – 82 pptv). We demonstrate that such low NO can enhance HOM production by modulating the RO₂ loss and favoring the formation of alkoxy radicals that can continue to autoxidize through isomerization. These insights suggest that HOM yields from typical boreal forest emissions can vary between 2.5%-6.5%, and HOM formation will not be completely inhibited even at high NO concentrations. Our findings challenge the notion that NO monotonically reduces HOM yields by extending the knowledge of RO₂-NO interactions to the low-NO regime. This represents a major advance towards an accurate assessment of HOM budgets, especially in low-NO environments, which prevails in the pre-industrial atmosphere, pristine areas, and the upper boundary layer.

Organisation(en)

Aerosolphysik und Umweltphysik

Externe Organisation(en)

Nanjing University, Fundan University, University of Helsinki, Lund University, IVL Swedish Environmental Research Institute, Johann Wolfgang Goethe-Universität Frankfurt am Main, Paul Scherrer Institute, University of California, Irvine, Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft, University of Colorado, Boulder, Instituto Superior Técnico, Universidade de Lisboa, California Institute of Technology (Caltech), Leopold-Franzens-Universität Innsbruck, Carnegie Mellon University, The Cyprus Institute, Pusan National University (PNU), Finnish Meteorological Institute, National Research Council Canada (NRC-CNRC), Russian Academy of Sciences, Moscow Institute of Physics and Technology, Universidade da Beira Interior, Fudan University, Harbin Institute of Technology, European Organization for Nuclear Research (CERN), Aerodyne Res Inc

Journal

Nature Communications

Band

14

Anzahl der Seiten

11

ISSN

2041-1723

DOI

https://doi.org/10.1038/s41467-023-39066-4

Publikationsdatum

06-2023

Peer-reviewed

Ja

ÖFOS 2012

103039 Aerosolphysik, 103037 Umweltphysik

ASJC Scopus Sachgebiete

Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie, Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/822ef484-e145-4372-a76f-5b32e86f56cc