Publication Date:
2013-02-23
Description:
Atmospheric nucleation is the dominant source of aerosol particles in the global atmosphere and an important player in aerosol climatic effects. The key steps of this process occur in the sub-2-nanometer (nm) size range, in which direct size-segregated observations have not been possible until very recently. Here, we present detailed observations of atmospheric nanoparticles and clusters down to 1-nm mobility diameter. We identified three separate size regimes below 2-nm diameter that build up a physically, chemically, and dynamically consistent framework on atmospheric nucleation--more specifically, aerosol formation via neutral pathways. Our findings emphasize the important role of organic compounds in atmospheric aerosol formation, subsequent aerosol growth, radiative forcing and associated feedbacks between biogenic emissions, clouds, and climate.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kulmala, Markku -- Kontkanen, Jenni -- Junninen, Heikki -- Lehtipalo, Katrianne -- Manninen, Hanna E -- Nieminen, Tuomo -- Petaja, Tuukka -- Sipila, Mikko -- Schobesberger, Siegfried -- Rantala, Pekka -- Franchin, Alessandro -- Jokinen, Tuija -- Jarvinen, Emma -- Aijala, Mikko -- Kangasluoma, Juha -- Hakala, Jani -- Aalto, Pasi P -- Paasonen, Pauli -- Mikkila, Jyri -- Vanhanen, Joonas -- Aalto, Juho -- Hakola, Hannele -- Makkonen, Ulla -- Ruuskanen, Taina -- Mauldin, Roy L 3rd -- Duplissy, Jonathan -- Vehkamaki, Hanna -- Back, Jaana -- Kortelainen, Aki -- Riipinen, Ilona -- Kurten, Theo -- Johnston, Murray V -- Smith, James N -- Ehn, Mikael -- Mentel, Thomas F -- Lehtinen, Kari E J -- Laaksonen, Ari -- Kerminen, Veli-Matti -- Worsnop, Douglas R -- New York, N.Y. -- Science. 2013 Feb 22;339(6122):943-6. doi: 10.1126/science.1227385.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, University of Helsinki, Finland. markku.kulmala@helsinki.fi〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23430652" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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