Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere

Author:

He Xu-Cheng123ORCID,Simon Mario4ORCID,Iyer Siddharth5ORCID,Xie Hong-Bin6ORCID,Rörup Birte1ORCID,Shen Jiali1,Finkenzeller Henning78ORCID,Stolzenburg Dominik19ORCID,Zhang Rongjie6,Baccarini Andrea1011ORCID,Tham Yee Jun112ORCID,Wang Mingyi13ORCID,Amanatidis Stavros13ORCID,Piedehierro Ana A.3,Amorim Antonio14ORCID,Baalbaki Rima1ORCID,Brasseur Zoé1ORCID,Caudillo Lucía4ORCID,Chu Biwu115ORCID,Dada Lubna110ORCID,Duplissy Jonathan116ORCID,El Haddad Imad10ORCID,Flagan Richard C.13ORCID,Granzin Manuel4,Hansel Armin17ORCID,Heinritzi Martin4ORCID,Hofbauer Victoria2ORCID,Jokinen Tuija118ORCID,Kemppainen Deniz1ORCID,Kong Weimeng13ORCID,Krechmer Jordan19ORCID,Kürten Andreas4ORCID,Lamkaddam Houssni10,Lopez Brandon220,Ma Fangfang6ORCID,Mahfouz Naser G. A.2,Makhmutov Vladimir2122ORCID,Manninen Hanna E.23ORCID,Marie Guillaume4ORCID,Marten Ruby10ORCID,Massabò Dario24ORCID,Mauldin Roy L.2526ORCID,Mentler Bernhard17ORCID,Onnela Antti23ORCID,Petäjä Tuukka1ORCID,Pfeifer Joschka23,Philippov Maxim21ORCID,Ranjithkumar Ananth27,Rissanen Matti P.528ORCID,Schobesberger Siegfried29ORCID,Scholz Wiebke17ORCID,Schulze Benjamin13ORCID,Surdu Mihnea10,Thakur Roseline C.1ORCID,Tomé António30ORCID,Wagner Andrea C.4ORCID,Wang Dongyu10ORCID,Wang Yonghong115ORCID,Weber Stefan K.423ORCID,Welti André3ORCID,Winkler Paul M.31,Zauner-Wieczorek Marcel4ORCID,Baltensperger Urs10ORCID,Curtius Joachim4ORCID,Kurtén Theo28,Worsnop Douglas R.119ORCID,Volkamer Rainer78ORCID,Lehtipalo Katrianne13ORCID,Kirkby Jasper423ORCID,Donahue Neil M.2202532ORCID,Sipilä Mikko1ORCID,Kulmala Markku1163334ORCID

Affiliation:

1. Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland.

2. Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

3. Finnish Meteorological Institute, 00560 Helsinki, Finland.

4. Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.

5. Aerosol Physics Laboratory, Faculty of Engineering and Natural Sciences, Tampere University, 33720 Tampere, Finland.

6. Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, 116024 Dalian, China.

7. Department of Chemistry, University of Colorado Boulder, Boulder, CO 80309, USA.

8. Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, USA.

9. Institute for Materials Chemistry, TU Wien, 1060 Vienna, Austria.

10. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.

11. Laboratory of Atmospheric Processes and their Impact, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

12. School of Marine Sciences, Sun Yat-sen University, 519082 Zhuhai, China.

13. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.

14. CENTRA and Faculdade de Ciências da Universidade de Lisboa, 1749-016 Lisboa, Portugal.

15. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100084 Beijing, China.

16. Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland.

17. Institute of Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.

18. Climate and Atmosphere Research Centre (CARE-C), The Cyprus Institute, 1645 Nicosia, Cyprus.

19. Aerodyne Research, Inc., Billerica, MA 01821, USA.

20. Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

21. P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia.

22. Moscow Institute of Physics and Technology (National Research University),141701 Moscow, Russian Federation.

23. CERN, the European Organization for Nuclear Research, CH-1211 Geneva, Switzerland.

24. Department of Physics, University of Genoa, 16146 Genoa, Italy.

25. Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

26. Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO 80309, USA.

27. Natural Environment Research Council, British Antarctic Survey, CB3 0ET Cambridge, UK.

28. Department of Chemistry, University of Helsinki, 00014 Helsinki, Finland.

29. Department of Applied Physics, University of Eastern Finland, 70211 Kuopio, Finland.

30. Instituto Dom Luiz (IDL)–Universidade da Beira Interior, 6201-001 Covilhã, Portugal.

31. Faculty of Physics, University of Vienna, 1090 Wien, Austria.

32. Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh, PA 15213, USA.

33. Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, 210023 Nanjing, China.

34. Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, China.

Abstract

The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H 2 SO 4 ), stabilized by ammonia (NH 3 ). However, in marine and polar regions, NH 3 is generally low, and H 2 SO 4 is frequently found together with iodine oxoacids [HIO x , i.e., iodic acid (HIO 3 ) and iodous acid (HIO 2 )]. In experiments performed with the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber, we investigated the interplay of H 2 SO 4 and HIO x during atmospheric particle nucleation. We found that HIO x greatly enhances H 2 SO 4 (-NH 3 ) nucleation through two different interactions. First, HIO 3 strongly binds with H 2 SO 4 in charged clusters so they drive particle nucleation synergistically. Second, HIO 2 substitutes for NH 3 , forming strongly bound H 2 SO 4 -HIO 2 acid-base pairs in molecular clusters. Global observations imply that HIO x is enhancing H 2 SO 4 (-NH 3 ) nucleation rates 10- to 10,000-fold in marine and polar regions.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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