Overview of the biosphere-aerosol-cloud-climate interactions (BACCI) studies

Research output: Contribution to journalReview article


Here we present research methods and results obtained by the Nordic Centre of Excellence Biosphere-Aerosol-Cloud-Climate Interactions (BACCI) between 1 January 2003 and 31 December 2007. The centre formed an integrated attempt to understand multiple, but interlinked, biosphere-atmosphere interactions applying inter and multidisciplinary approaches in a coherent manner. The main objective was to study the life cycle of aerosol particles and their importance on climate change. The foundation in BACCI was a thorough understanding of physical, meteorological, chemical and ecophysiological processes, providing a unique possibility to study biosphere-aerosol-cloud-climate interactions. Continuous measurements of atmospheric concentrations and fluxes of aerosol particles and precursors and, CO2/aerosol trace gas interactions in different field stations (e.g. SMEAR) were supported by models of particle thermodynamics, transport and dynamics, atmospheric chemistry, boundary layer meteorology and forest growth. The main progress was related to atmospheric new particle formation, existence of clusters, composition of nucleation mode aerosol particles, chemical precursors of fresh aerosol particles, the contribution of biogenic aerosol particles on the global aerosol load, transport, transformation and deposition of aerosol particles, thermodynamics related to aerosol particles and cloud droplets, and the microphysics and chemistry of cloud droplet formation.


  • Markku Kulmala
  • Veli-Matti Kerminen
  • Ari Laaksonen
  • Ilona Riipinen
  • Mikko Sipila
  • Taina M. Ruuskanen
  • Larisa Sogacheva
  • Pertti Hari
  • Jaana Back
  • Kari E. J. . Lehtinen
  • Yrjo Viisanen
  • Merete Bilde
  • Mihalis Lazaridis
  • Kjetil Torseth
  • Peter Tunved
  • E. Douglas Nilsson
  • Sara Pryor
  • Lise-Lotte Sorensen
  • Urmas Horrak
  • Paul M. Winkler
  • Erik Swietlicki
  • Marja-Liisa Riekkola
  • Radovan Krejci
  • Christopher Hoyle
  • Oystein Hov
  • Gunnar Myhre
  • Hans-Christen Hansson
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Geography
Original languageEnglish
Pages (from-to)300-317
JournalTellus. Series B: Chemical and Physical Meteorology
Issue number3
Publication statusPublished - 2008
Publication categoryResearch