Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere
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.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:382 |
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| Enthalten in: |
Science (New York, N.Y.) - 382(2023), 6676 vom: 15. Dez., Seite 1308-1314 |
| Sprache: |
Englisch |
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| Links: |
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| Anmerkungen: |
Date Revised 14.12.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1126/science.adh2526 |
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NLM365869848 |
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| 100 | 1 | |a He, Xu-Cheng |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere |
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| 520 | |a 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 | ||
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| 700 | 1 | |a Rörup, Birte |e verfasserin |4 aut | |
| 700 | 1 | |a Shen, Jiali |e verfasserin |4 aut | |
| 700 | 1 | |a Finkenzeller, Henning |e verfasserin |4 aut | |
| 700 | 1 | |a Stolzenburg, Dominik |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Rongjie |e verfasserin |4 aut | |
| 700 | 1 | |a Baccarini, Andrea |e verfasserin |4 aut | |
| 700 | 1 | |a Tham, Yee Jun |e verfasserin |4 aut | |
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| 700 | 1 | |a Chu, Biwu |e verfasserin |4 aut | |
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