Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere

Xu-Cheng He, Mario Simon, Siddharth Iyer, Hong-Bin Xie, Birte Rörup, Jiali Shen, Henning Finkenzeller, Dominik Stolzenburg, Rongjie Zhang, Andrea Baccarini, Yee Jun Tham, Mingyi Wang, Stavros Amanatidis, Ana A. Piedehierro, Antonio Amorim, Rima Baalbaki, Zoé Brasseur, Lucía Caudillo, Biwu Chu, Lubna DadaJonathan Duplissy, Imad El Haddad, Richard C. Flagan, Manuel Granzin, Armin Hansel, Martin Heinritzi, Victoria Hofbauer, Tuija Jokinen, Deniz Kemppainen, Weimeng Kong, Jordan Krechmer, Andreas Kürten, Houssni Lamkaddam, Brandon Lopez, Fangfang Ma, Naser G. A. Mahfouz, Vladimir Makhmutov, Hanna E Manninen, Guillaume Marie, Ruby Marten, Dario Massabò, Roy L. Mauldin, Bernhard Mentler, Antti Onnela, Tuukka Petäjä, Joschka Pfeifer, Maxim Philippov, Ananth Ranjithkumar, Matti P Rissanen, Siegfried Schobesberger, Wiebke Scholz, Benjamin Schulze, Mihnea Surdu, Roseline C Thakur, António Tomé, Andrea C. Wagner, Dongyu Wang, Yonghong Wang, Stefan K. Weber, André Welti, Paul M. Winkler, Marcel Zauner-Wieczorek, Urs Baltensperger, Joachim Curtius, Theo Kurtén, Douglas R Worsnop, Rainer Volkamer, Katrianne Lehtipalo, Jasper Kirkby, Neil M. Donahue, Mikko Sipilä, Markku Kulmala

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Sammanfattning

The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H2SO4), stabilized by ammonia (NH3). However, in marine and polar regions, NH3 is generally low, and H2SO4 is frequently found together with iodine oxoacids [HIOx, i.e., iodic acid (HIO3) and iodous acid (HIO2)]. In experiments performed with the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber, we investigated the interplay of H2SO4 and HIOx during atmospheric particle nucleation. We found that HIOx greatly enhances H2SO4(-NH3) nucleation through two different interactions. First, HIO3 strongly binds with H2SO4 in charged clusters so they drive particle nucleation synergistically. Second, HIO2 substitutes for NH3, forming strongly bound H2SO4-HIO2 acid-base pairs in molecular clusters. Global observations imply that HIOx is enhancing H2SO4(-NH3) nucleation rates 10- to 10,000-fold in marine and polar regions.
Originalspråkengelska
TidskriftScience
Volym382
Nummer6676
Sidor (från-till)1308-1314
Antal sidor6
ISSN0036-8075
DOI
StatusPublicerad - 1 dec. 2023
MoE-publikationstypA1 Tidskriftsartikel-refererad

Bibliografisk information

Correction (5 January 2024): The degree symbols in Fig. 3, B to F, were unnecessarily underlined during the production process. The underlining has been removed.

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