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Low impact of dry conditions on the CO2 exchange of aNorthern-Norwegian blanket bog.

Lund, Magnus; Bjerke, Jarle W.; Drake, Bert G.; Engelsen, Ola; Hansen, Georg Heinrich; Parmentier, Frans-Jan W.; Powell, Thomas; Silvennoinen, Hanna Marika; Sottocornola, Matteo; Tømmervik, Hans; Weldon, Simon Mark; Rasse, Daniel
Peer reviewed
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URI
http://hdl.handle.net/11250/284792
Date
2015
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  • Publikasjoner fra CRIStin - NINA [1722]
  • Scientific publications [743]
Original version
Environmental Research Letters 2015, 10   10.1088/1748-9326/10/2/025004
Abstract
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 andCsink functioning. This study presents a 4.5 year record of land–

atmosphere carbon dioxide (CO2) exchange from the Andøya blanket bog in northern Norway. Compared

with other peatlands, the Andøya 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 theCO2 exchange dynamics were observed, indicating

that under present conditions and within the range of observed meteorological conditions the Andøya

blanket bog retained its Cuptake function. Continued monitoring of these ecosystem types is essential

in order to detect possible effects of a changing climate.

peatland, carbon, blanket bog, eddy covariance, climate change, net ecosystem exchange
Journal
Environmental Research Letters

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