> Details
He, Xu-Cheng;
Simon, Mario;
Iyer, Siddharth;
Xie, Hong-Bin;
Rörup, Birte;
Shen, Jiali;
Finkenzeller, Henning;
Stolzenburg, Dominik;
Zhang, Rongjie;
Baccarini, Andrea;
Tham, Yee Jun;
Wang, Mingyi;
Amanatidis, Stavros;
Piedehierro, Ana A.;
Amorim, Antonio;
Baalbaki, Rima;
Brasseur, Zoé;
Caudillo, Lucía;
Chu, Biwu;
Dada, Lubna;
Duplissy, Jonathan;
El Haddad, Imad;
Flagan, Richard C.;
Granzin, Manuel;
[...]
Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere
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- Media type: E-Article
- Title: Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere
- Contributor: He, Xu-Cheng; Simon, Mario; Iyer, Siddharth; Xie, Hong-Bin; Rörup, Birte; Shen, Jiali; Finkenzeller, Henning; Stolzenburg, Dominik; Zhang, Rongjie; Baccarini, Andrea; Tham, Yee Jun; Wang, Mingyi; Amanatidis, Stavros; Piedehierro, Ana A.; Amorim, Antonio; Baalbaki, Rima; Brasseur, Zoé; Caudillo, Lucía; Chu, Biwu; Dada, Lubna; Duplissy, Jonathan; El Haddad, Imad; Flagan, Richard C.; Granzin, Manuel; [...]
-
imprint:
American Association for the Advancement of Science (AAAS), 2023
- Published in: Science
- Language: English
- DOI: 10.1126/science.adh2526
- ISSN: 0036-8075; 1095-9203
- Origination:
- Footnote:
- Description: <jats:p> The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> ), stabilized by ammonia (NH <jats:sub>3</jats:sub> ). However, in marine and polar regions, NH <jats:sub>3</jats:sub> is generally low, and H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> is frequently found together with iodine oxoacids [HIO <jats:italic> <jats:sub>x</jats:sub> </jats:italic> , i.e., iodic acid (HIO <jats:sub>3</jats:sub> ) and iodous acid (HIO <jats:sub>2</jats:sub> )]. In experiments performed with the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber, we investigated the interplay of H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> and HIO <jats:italic> <jats:sub>x</jats:sub> </jats:italic> during atmospheric particle nucleation. We found that HIO <jats:italic> <jats:sub>x</jats:sub> </jats:italic> greatly enhances H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> (-NH <jats:sub>3</jats:sub> ) nucleation through two different interactions. First, HIO <jats:sub>3</jats:sub> strongly binds with H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> in charged clusters so they drive particle nucleation synergistically. Second, HIO <jats:sub>2</jats:sub> substitutes for NH <jats:sub>3</jats:sub> , forming strongly bound H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> -HIO <jats:sub>2</jats:sub> acid-base pairs in molecular clusters. Global observations imply that HIO <jats:italic> <jats:sub>x</jats:sub> </jats:italic> is enhancing H <jats:sub>2</jats:sub> SO <jats:sub>4</jats:sub> (-NH <jats:sub>3</jats:sub> ) nucleation rates 10- to 10,000-fold in marine and polar regions. </jats:p>