Articles | Volume 3, issue 1
Biogeosciences, 3, 103–112, 2006

Special issue: Integrated Land Ecosystem-Atmosphere Processes Study...

Biogeosciences, 3, 103–112, 2006

  14 Mar 2006

14 Mar 2006

Measurements of hydrocarbon emissions from a boreal fen using the REA technique

S. Haapanala1, J. Rinne1, K.-H. Pystynen2, H. Hellén2, H. Hakola2, and T. Riutta3 S. Haapanala et al.
  • 1University of Helsinki, Department of Physical Sciences, Helsinki, Finland
  • 2Finnish Meteorological Institute, Air Chemistry Laboratory, Helsinki, Finland
  • 3University of Helsinki, Department of Forest Ecology, Helsinki, Finland

Abstract. Fluxes of biogenic volatile organic compounds (VOC) and methane were measured above a boreal fen. Vegetation on the fen is dominated by Sphagnum mosses and sedges. A relaxed eddy accumulation (REA) system with dynamic deadband was designed and constructed for the measurements. Methane, C2-C6 hydrocarbons and some halogenated hydrocarbons were analysed from the samples by gas chromatographs equipped with FID and ECD. A significant flux of isoprene and methane was detected during the growing seasons. Isoprene emission was found to follow the common isoprene emission algorithm. Average standard emission potential of isoprene was 680 µg m-2 h-1. Fluxes of other non-methane hydrocarbons were below detection limit.

Final-revised paper