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Low impact of dry conditions on the CO2 exchange of a Northern-Norwegian blanket bog

Author:
  • Magnus Lund
  • J. W. Bjerke
  • B. G. Drake
  • O. Engelsen
  • G. H. Hansen
  • Frans-Jan Parmentier
  • T. L. Powell
  • H. Silvennoinen
  • M. Sottocornola
  • H. Tommervik
  • S. Weldon
  • D. P. Rasse
Publishing year: 2015
Language: English
Publication/Series: Environmental Research Letters
Volume: 10
Issue: 2
Document type: Journal article
Publisher: IOP Publishing

Abstract english

Northern peatlands hold large amounts of organic carbon (C) in their soils and are as such important in a climate change context. Blanket bogs, i.e. nutrient-poor peatlands restricted to maritime climates, may be extra vulnerable to global warming since they require a positive water balance to sustain their moss dominated vegetation and C sink functioning. This study presents a 4.5 year record of land-atmosphere carbon dioxide (CO2) exchange from the Andoya blanket bog in northern Norway. Compared with other peatlands, the Andoya peatland exhibited low flux rates, related to the low productivity of the dominating moss and lichen communities and the maritime settings that attenuated seasonal temperature variations. It was observed that under periods of high vapour pressure deficit, net ecosystem exchange was reduced, which was mainly caused by a decrease in gross primary production. However, no persistent effects of dry conditions on the CO2 exchange dynamics were observed, indicating that under present conditions and within the range of observed meteorological conditions the Andoya blanket bog retained its C uptake function. Continued monitoring of these ecosystem types is essential in order to detect possible effects of a changing climate.

Keywords

  • Physical Geography
  • peatland
  • carbon
  • blanket bog
  • eddy covariance
  • climate change
  • net
  • ecosystem exchange

Other

Published
  • ISSN: 1748-9326
Frans-Jan Parmentier
E-mail: frans-jan [dot] parmentier [at] nateko [dot] lu [dot] se

Associate professor

Dept of Physical Geography and Ecosystem Science

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Department of Physical Geography and Ecosystem Science
Lund University
Sölvegatan 12
S-223 62 Lund
Sweden

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