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Non-methane volatile organic compound flux from a subarctic mire in Northern Sweden

Author:
  • Kristina Bäckstrand
  • Patrick M Crill
  • Mikhail Mastepanov
  • Torben Christensen
  • David Bastviken
Publishing year: 2008
Language: English
Pages: 226-237
Publication/Series: Tellus. Series B: Chemical and Physical Meteorology
Volume: 605
Issue: 2
Document type: Journal article
Publisher: Taylor & Francis

Abstract english

Biogenic NMVOCs are mainly formed by plants and microorganisms. They have strong impact on the local atmospheric chemistry when emitted to the atmosphere. The objective of this study was to determine if there are significant emissions of non-methane volatile organic compounds (NMVOCs) from a subarctic mire in northern Sweden. Subarctic peatlands in discontinuous permafrost regions are undergoing substantial environmental changes due to their high sensitivity to climate warming and there is need for including NMVOCs in the overall carbon budget. Automatic and manual chamber measurements were used to estimate NMVOC fluxes from three dominating subhabitats on the mire during three growing seasons. Emission rates varied and were related to plant species distribution and seasonal net ecosystem exchange of carbon dioxide. The highest fluxes were observed from wetter sites dominated by Eriophorum and Sphagnum spp. Total NMVOC emissions from the mire (∼17 ha) is estimated to consist of ∼150 kgC during a growing season with 150 d. NMVOC fluxes can account for ∼5% of total net carbon exchange (−3177 kgC) at the mire during the same period. NMVOC emissions are therefore a significant component in a local carbon budget for peatlands.

Keywords

  • Physical Geography

Other

Published
  • ISSN: 0280-6509
E-mail: mikhail [dot] mastepanov [at] nateko [dot] lu [dot] se

Researcher

Dept of Physical Geography and Ecosystem Science

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Department of Physical Geography and Ecosystem Science
Lund University
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S-223 62 Lund
Sweden

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