Global analysis of continental boundary layer new particle formation based on long-term measurements

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift


Atmospheric new particle formation (NPF) is an important phenomenon in terms of global particle number concentrations. Here we investigated the frequency of NPF, formation rates of 10 nm particles, and growth rates in the size range of 10–25 nm using at least 1 year of aerosol number size-distribution observations at 36 different locations around the world. The majority of these measurement sites are in the Northern Hemisphere. We found that the NPF frequency has a strong seasonal variability. At the measurement sites analyzed in this study, NPF occurs most frequently in March–May (on about 30 % of the days) and least frequently in December-February (about 10 % of the days). The median formation rate of 10 nm particles varies by about 3 orders of magnitude (0.01–10 cm−3 s−1) and the growth rate by about an order of magnitude (1–10 nm h−1). The smallest values of both formation and growth rates were observed at polar sites and the largest ones in urban environments or anthropogenically influenced rural sites. The correlation between the NPF event frequency and the particle formation and growth rate was at best moderate among the different measurement sites, as well as among the sites belonging to a certain environmental regime. For a better understanding of atmospheric NPF and its regional importance, we would need more observational data from different urban areas in practically all parts of the world, from additional remote and rural locations in North America, Asia, and most of the Southern Hemisphere (especially Australia), from polar areas, and from at least a few locations over the oceans.


  • Tuomo Nieminen
  • Veli Matti Kerminen
  • Tuukka Petäjä
  • Pasi P. Aalto
  • Mikhail Arshinov
  • Eija Asmi
  • Urs Baltensperger
  • David C.S. Beddows
  • Johan Paul Beukes
  • Don Collins
  • Aijun Ding
  • Roy M. Harrison
  • Bas Henzing
  • Rakesh Hooda
  • Min Hu
  • Urmas Hõrrak
  • Niku Kivekäs
  • Kaupo Komsaare
  • Radovan Krejci
  • Lauri Laakso
  • Ari Laaksonen
  • W. Richard Leaitch
  • Heikki Lihavainen
  • Nikolaos Mihalopoulos
  • Zoltán Németh
  • Wei Nie
  • Colin O'Dowd
  • Imre Salma
  • Karine Sellegri
  • Peter Tunved
  • Vidmantas Ulevicius
  • Ville Vakkari
  • Marko Vana
  • Alfred Wiedensohler
  • Zhijun Wu
  • Annele Virtanen
  • Markku Kulmala
Enheter & grupper
Externa organisationer
  • University of Helsinki
  • University of Eastern Finland
  • Zuev Institute of Atmospheric Optics of the Siberian Branch of the RAS
  • Finnish Meteorological Institute
  • Servicio Meteorológico Nacional, Argentina
  • Paul Scherrer Institute
  • University of Birmingham
  • North-West University
  • Texas A and M University
  • Nanjing University
  • King Abdulaziz University
  • Netherlands Organisation for Applied Scientific Research
  • The Energy and Resources Institute India
  • Peking University
  • University of Tartu
  • Stockholms universitet
  • Environment Canada
  • University of Crete
  • Eötvös Loránd University
  • National University of Ireland Galway
  • Observatoire de Physique du Globe de Clermont- Ferrand
  • Center for Physical Sciences and Technology, Lithuania
  • Leibniz Institute for Tropospheric Research
  • Beijing University of Chemical Technology

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Meteorologi och atmosfärforskning
Sidor (från-till)14737-14756
Antal sidor20
TidskriftAtmospheric Chemistry and Physics
Utgåva nummer19
StatusPublished - 2018 okt 12
Peer review utfördJa