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Published May 27, 2020 | Supplemental Material + Published
Journal Article Open

Size-dependent influence of NOₓ on the growth rates of organic aerosol particles

Abstract

Atmospheric new-particle formation (NPF) affects climate by contributing to a large fraction of the cloud condensation nuclei (CCN). Highly oxygenated organic molecules (HOMs) drive the early particle growth and therefore substantially influence the survival of newly formed particles to CCN. Nitrogen oxide (NOₓ) is known to suppress the NPF driven by HOMs, but the underlying mechanism remains largely unclear. Here, we examine the response of particle growth to the changes of HOM formation caused by NOₓ. We show that NOₓ suppresses particle growth in general, but the suppression is rather nonuniform and size dependent, which can be quantitatively explained by the shifted HOM volatility after adding NOₓ. By illustrating how NOₓ affects the early growth of new particles, a critical step of CCN formation, our results help provide a refined assessment of the potential climatic effects caused by the diverse changes of NOₓ level in forest regions around the globe.

Additional Information

© 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). Submitted 1 July 2019; Accepted 19 March 2020; Published 27 May 2020. We thank CERN for supporting CLOUD with technical and financial resources. We thank P. Carrie, L. P. De Menezes, J. Dumollard, K. Ivanova, F. Josa, I. Krasin, R. Kristic, A. Laassiri, O. S. Maksumov, B. Marichy, H. Martinati, S. V. Mizin, R. Sitals, A. Wasem, and M. Wilhelmsson for their contributions to the experiment. We thank the tofTools team for providing programs for data analysis of mass spectrometry. This research has received funding from the EC Seventh Framework Programme and European Union's Horizon 2020 programme (Marie Curie ITN no. 316662 "CLOUD-TRAIN," MSCA-IF no. 656994 "nano-CAVa," MC-COFUND grant no. 600377, and ERC project no. 692891 "DAMOCLES," no. 638703 "COALA," no. 257360 "MOCAPAF," no. 227463 "ATMNUCLE," no. 616075 "NANODYNAMITE," no. 335478 "QAPPA," and no.742206 "ATM-GTP"), the German Federal Ministry of Education and Research (project nos. 01LK0902A, 01LK1222A, and 01LK1601A), the Swiss National Science Foundation (project nos. 200020_135307, 206620_141278, 200021_140663, and 206021_144947/1), the Academy of Finland (Center of Excellence no. 1118615, project nos. 135054, 133872, 251427, 139656, 139995, 137749, 141217, 141451, 299574, 138951, 251007, 317380, 320094, and 316114), the Finnish Funding Agency for Technology and Innovation, the Väisälä Foundation, the Nessling Foundation, the Austrian Science Fund (FWF; project no. J3951-N36), the Austrian Research Funding Association (FFG, project no. 846050), the Portuguese Foundation for Science and Technology (project no. CERN/FP/116387/2010), the Swedish Research Council Formas (project no. 2015-749), Vetenskapsrådet (grant 2011-5120), the Presidium of the Russian Academy of Sciences and Russian Foundation for Basic Research (grants 08-02-91006-CERN and 12-02-91522-CERN), the U.S. National Science Foundation (grants AGS1136479, AGS1447056, AGS1439551, CHE1012293, AGS1649147, and AGS1602086), the U.S. Department of Energy (grant DE-SC0014469), the NERC GASSP project NE/J024252/1m, the Royal Society (Wolfson Merit Award), United Kingdom Natural Environment Research Council grant NE/K015966/1, Dreyfus Award EP-11-117, the French National Research Agency, the Nord-Pas de Calais, European Funds for Regional Economic Development Labex-Cappa grant ANR-11-LABX-0005-01, the National Natural Science Foundation of China, (D0512/41675145), and the Jiangsu Collaborative Innovation Center for Climate Change. M.S. acknowledges funding from the Academy of Finland (3282290) and H2020 European Research Council ERC-StG ("GASPARCON", 714621). Author contributions: C.Y., W.N., K.L., M.E., and M.K. designed the experiments and wrote the paper. C.Y., W.N., A.L.V., L.D., K.L., D.S., R.W., M.X., and C.R. analyzed the main datasets. All other authors contributed to the design of the facility, preparation of the instruments, or data collection and commented on the manuscript. Competing interests: The authors declare that they have no competing interests. The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. Additional data related to this paper may be requested from the authors. The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Additional details

Created:
August 19, 2023
Modified:
October 20, 2023