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Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation

Kulmala, Markku und Riipinen, Ilona und Nieminen, Tuomo und Hulkkonen, Mira und Sogacheva, Larisa und Manninen, Hanna E. und Paasonen, Pauli und Petäjä, Tuukka und Dal Maso, Miikka und Aalto, Pasi P. und Viljanen, Ari und Usoskin, Ilya und Vainio, Rami und Mirme, Sander und Mirme, Aadu und Minikin, Andreas und Petzold, Andreas und Horrak, Urmas und Plaß-Dülmer, Christian und Birmili, Wolfram und Kerminen, Veli-Matti (2010) Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation. Atmospheric Chemistry and Physics, 10, Seiten 1885-1898.

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Offizielle URL: http://www.atmos-chem-phys.net/10/1885/2010/

Kurzfassung

Aerosol particles affect the Earth�s radiative balance by directly scattering and absorbing solar radiation and, indirectly, through their activation into cloud droplets. Both effects are known with considerable uncertainty only, and translate into even bigger uncertainties in future climate predictions. More than a decade ago, variations in galactic cosmic rays were suggested to closely correlate with variations in atmospheric cloud cover and therefore constitute a driving force behind aerosol-cloud-climate interactions. Later, the enhancement of atmospheric aerosol particle formation by ions generated from cosmic rays was proposed as a physical mechanism explaining this correlation. Here, we report unique observations on atmospheric aerosol formation based on measurements at the SMEAR II station, Finland, over a solar cycle (years 1996�2008) that shed new light on these presumed relationships. Our analysis shows that none of the quantities related to aerosol formation correlates with the cosmic ray-induced ionisation intensity (CRII). We also examined the contribution of ions to new particle formation on the basis of novel ground-based and airborne observations. A consistent result is that ion-induced formation contributes typically less than 10% to the number of new particles, which would explain the missing correlation between CRII and aerosol formation. Our main conclusion is that galactic cosmic rays appear to play a minor role for atmospheric aerosol formation, and so for the connected aerosol-climate effects as well.

Dokumentart:Zeitschriftenbeitrag
Titel:Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Kulmala, MarkkuUniv. of Helsinki
Riipinen, IlonaUniv. of Helsinki
Nieminen, TuomoUniv. of Helsinki
Hulkkonen, MiraUniv. of Helsinki
Sogacheva, LarisaUniv. of Helsinki
Manninen, Hanna E.Univ. of Helsinki
Paasonen, PauliUniv. of Helsinki
Petäjä, TuukkaUniv. of Helsinki
Dal Maso, MiikkaUniv. of Helsinki
Aalto, Pasi P.Univ. of Helsinki
Viljanen, AriFMI, Helsinki
Usoskin, IlyaUniv. of Oulu, Sodankylä, FIN
Vainio, RamiUniv. of Helsinki
Mirme, SanderUniv. of Tartu, EST
Mirme, AaduUniv. of Tartu, EST
Minikin, AndreasDLR
Petzold, AndreasDLR
Horrak, UrmasUniv. of Tartu, EST
Plaß-Dülmer, ChristianDWD, Hohenpeissenberg
Birmili, WolframIfT, Leipzig
Kerminen, Veli-MattiFMI, Helsinki
Datum:2010
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:10
Seitenbereich:Seiten 1885-1898
Status:veröffentlicht
Stichwörter:EUCAARI, galactic cosmic rays, aerosol particle formation
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Dr.rer.nat. Andreas Petzold
Hinterlegt am:14 Dez 2009 12:43
Letzte Änderung:12 Dez 2013 20:48

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