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New Particle Formation in Clean Savannah Environment

  • Lauri Laakso
  • Tuukka Petäjä
  • H. Laakso
  • Pasi Aalto
  • T. Pohja
  • E. Siivola
  • P. Keronen
  • S. Haapanala
  • Hannele Hakola
  • N. Kgabi
  • M. Molefe
  • D. Mabaso
  • K. Pienaar
  • E. Sjöberg
  • M. Jokinen
  • Markku Kulmala
Conference paper

Southern African savanna background environment lacks previous, continuous long-term combined sub-micrometer aerosol number concentration and gas measurements. We have build a mobile measurement trailer, which contains measurements of aerosol number size distributions 10–840 nm, positive and negative ion size distributions 0.4–40 nm, aerosol mass PM10, PM2.5, PM1, inorganic compound in PM10 and PM2.5, gases like SO2, NO, NOx, CO, O3 and basic meteorology. In addition, we measure periodically VOCs. The trailer is wellprotected against thunder storms, electricity breaks and other typical problems. It is connected to internet via GPRS-modem. Preliminary results show that in a clean savanna environment, new particle formation takes place every sunny day, with relatively high nucleation rates and very high growth rates (up to 15 nm/h).

Keywords Particle formation and growth, aerosol measurement, atmospheric aerosol, air pollution

Keywords

Particle Formation Atmospheric Aerosol Aerosol Mass High Nucleation Rate Total Number Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Aalto, P. et al., Physical characterization of aerosol particles during nucleation events, Tellus, 53B, 344–358 (2001).ADSGoogle Scholar
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  3. Vesala, T. et al., Long-term field measurements of atmosphere-surface interactions in boreal forest combining forest ecology, micrometeorology, aerosol physics and atmospheric chemistry, Trends in Heat, Mass & Momentum Transfer, 4:17–35 (1998).Google Scholar

Copyright information

© Springer 2007

Authors and Affiliations

  • Lauri Laakso
    • 1
  • Tuukka Petäjä
    • 1
  • H. Laakso
    • 1
  • Pasi Aalto
    • 1
  • T. Pohja
    • 1
  • E. Siivola
    • 1
  • P. Keronen
    • 1
  • S. Haapanala
    • 1
  • Hannele Hakola
    • 2
  • N. Kgabi
    • 3
  • M. Molefe
    • 3
  • D. Mabaso
    • 3
  • K. Pienaar
    • 3
  • E. Sjöberg
    • 4
  • M. Jokinen
    • 4
  • Markku Kulmala
    • 1
  1. 1.Department of Physical SciencesUniversity of HelsinkiFinland
  2. 2.Finnish Meteorological InstituteFinland
  3. 3.The North-West UniversitySouth Africa
  4. 4.Department of Agriculture, Conservation and EnvironmentMafikengSouth Africa

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