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The Role of Sulfuric Acid in Atmospheric Nucleation
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SYSNO ASEP 0341594 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Role of Sulfuric Acid in Atmospheric Nucleation Author(s) Sipilä, M. (FI)
Berndt, T. (DE)
Petäjä, T. (FI)
Brus, David (UCHP-M) RID, SAI, ORCID
Vanhanen, J. (FI)
Stratmann, F. (DE)
Patokoski, J. (FI)
Mauldin, III, R.L. (US)
Hyvärinen, A.-P. (FI)
Lihavainen, H. (FI)
Kulmala, M. (FI)Source Title Science. - : American Association for the Advancement of Science - ISSN 0036-8075
Roč. 327, č. 5970 (2010), s. 1243-1246Number of pages 6 s. Language eng - English Country US - United States Keywords nucleation ; sulfuric acid ; climate Subject RIV CF - Physical ; Theoretical Chemistry CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000275162100036 DOI 10.1126/science.1180315 Annotation Nucleation is a fundamental step in atmospheric new-particle formation. However, laboratory experiments on nucleation have systematically failed to demonstrate sulfuric acid particle formation rates as high as those necessary to account for ambient atmospheric concentrations, and the role of sulfuric acid in atmospheric nucleation has remained a mystery. Here, we report measurements of new particles (with diameters of approximately 1.5 nanometers) observed immediately after their formation at atmospherically relevant sulfuric acid concentrations. Furthermore, we show that correlations between measured nucleation rates and sulfuric acid concentrations suggest that freshly formed particles contain one to two sulfuric acid molecules, a number consistent with assumptions that are based on atmospheric observations. Incorporation of these findings into global models should improve the understanding of the impact of secondary particle formation on climate. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2011
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