La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Monitoring the Multi-Year Carbon Balance of a Subarctic Palsa Mire with Micrometeorological Techniques
Auteurs :	Torben R. Christensen, Auteur ; Marcin Jackowicz-Korczynski, Auteur ; Mika Aurela, Auteur ; Patrick Crill, Auteur ; Michal Heliasz, Auteur ; Mikhail Mastepanov, Auteur ; Thomas Friborg, Auteur
Type de document :	Article
Dans :	AMBIO (41 JUL 2012)
Article en page(s) :	207-217
Langues:	Anglais
Résumé :	This article reports a dataset on 8 years of monitoring carbon fluxes in a subarctic palsa mire based on micrometeorological eddy covariance measurements. The mire is a complex with wet minerotrophic areas and elevated dry palsa as well as intermediate sub-ecosystems. The measurements document primarily the emission originating from the wet parts of the mire dominated by a rather homogenous cover of Eriophorum angustifolium. The CO2/CH4 flux measurements performed during the years 2001-2008 showed that the areas represented in the measurements were a relatively stable sink of carbon with an average annual rate of uptake amounting to on average -46 g C m(-2) y(-1) including an equally stable loss through CH4 emissions (18-22 g CH4-C m(-2) y(-1)). This consistent carbon sink combined with substantial CH4 emissions is most likely what is to be expected as the permafrost under palsa mires degrades in response to climate warming.

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