The natural aerosol over Northern Europe and its relation to anthropogenic emissions - implications of important climate feedbacks

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

We use a recently developed parametrization to estimate the regional particle field in the summer time troposphere over Scandinavia that would result if the forest were the only source of particles. The calculated field is compared with available observational data. It is concluded that the needle leaf forest above 58 degrees N alone is capable of producing aerosol mass concentrations corresponding to 12-50% of today's values in the boundary layer over Scandinavia. We also demonstrate that the forest itself could produce up to 200 CCN per cubic centimetre on average over Scandinavia and further show that an increase in temperature by 5.8 degrees C compared to today's average temperature could increase this CCN population by 40%. The study shows that we are able to approximate the natural aerosol field resulting from biogenic emissions over the boreal forest in the northern hemispheric region. This information provide an important contribution in the evaluation of the climate effect caused by anthropogenic emissions of particles over the forest and also opens the possibility to better address the climate feedbacks believed to be associated with the boreal region.

Detaljer

Författare
  • Peter Tunved
  • Ström Johan
  • Kulmala Markku
  • Kerminen Veli-Matti
  • Dal Maso Mikka
  • Birgitta Svenningsson
  • Lunder Chris
  • Hansson Hans Christen
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Naturgeografi
  • Subatomär fysik
Originalspråkengelska
Sidor (från-till)473-484
TidskriftTellus. Series B: Chemical and Physical Meteorology
Volym60 B
Utgåva nummer4
StatusPublished - 2008
PublikationskategoriForskning
Peer review utfördJa