Maqola

Direct Observations of Atmospheric Aerosol Nucleation

Markku KulmalaDepartment of Physics, University of Helsinki, FinlandJenni KontkanenDepartment of Physics, University of Helsinki, FinlandHeikki JunninenDepartment of Physics, University of Helsinki, FinlandKatrianne LehtipaloDepartment of Physics, University of Helsinki, FinlandHanna E. ManninenDepartment of Physics, University of Helsinki, FinlandTuomo NieminenDepartment of Physics, University of Helsinki, FinlandTuukka PetäjäDepartment of Physics, University of Helsinki, FinlandMikko SipiläDepartment of Physics, University of Helsinki, FinlandSiegfried SchobesbergerDepartment of Physics, University of Helsinki, FinlandPekka RantalaDepartment of Physics, University of Helsinki, FinlandAlessandro FranchinDepartment of Physics, University of Helsinki, FinlandTuija JokinenDepartment of Physics, University of Helsinki, FinlandEmma JärvinenDepartment of Physics, University of Helsinki, FinlandMikko ÄijäläDepartment of Physics, University of Helsinki, FinlandJuha KangasluomaDepartment of Physics, University of Helsinki, FinlandJani HakalaDepartment of Physics, University of Helsinki, FinlandPasi P. AaltoDepartment of Physics, University of Helsinki, FinlandPauli PaasonenDepartment of Physics, University of Helsinki, FinlandJyri MikkiläJoonas VanhanenJuho AaltoSMEAR Station II, Hyytiälä, FinlandHannele HakolaFinnish Meteorological Institute, FinlandUlla MakkonenFinnish Meteorological Institute, FinlandT. M. RuuskanenDepartment of Physics, University of Helsinki, FinlandRoy L. MauldinDepartment of Physics, University of Helsinki, FinlandJonathan DuplissyDepartment of Physics, University of Helsinki, FinlandHanna VehkamäkiDepartment of Physics, University of Helsinki, FinlandJaana BäckDepartment of Forest Sciences, University of Helsinki, FinlandAki KortelainenUniversity of Eastern Finland, Kuopio, FinlandIlona RiipinenUniversity of Stockholm, Stockholm, SwedenTheo KurténDepartment of Chemistry, University of Helsinki, FinlandMurray V. JohnstonUniversity of Delaware, Newark, DE, USAJames N. SmithNational Center for Atmospheric Research, Boulder, CO, USAMikael EhnDepartment of Physics, University of Helsinki, FinlandThomas F. MentelForschungszentrum Juelich, IEK-8, 52425 Juelich, GermanyK. E. J. LehtinenFinnish Meteorological Institute, FinlandAri LaaksonenFinnish Meteorological Institute, FinlandVeli‐Matti KerminenDepartment of Physics, University of Helsinki, FinlandDouglas R. WorsnopAerodyne Research, Billerica, MA, USA

2013en

ABI

Annotatsiya

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.

Hali tarjima qilinmagan

Identifikatorlar

DOI: 10.1126/science.1227385

Iqtiboslar va manbalar

3 ta iqtibos0 ta foydalanilgan manba

Koʻrsatkichlar — AkademScholar