Monitoring the Multi-Year Carbon Balance of a Subarctic Palsa Mire with Micrometeorological Techniques

摘要

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 CO_2/CH_4 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 CH_4 emissions (18-22 g CH_4-Cm~(-2)y~(-1)). This consistent carbon sink combined with substantial CH_4 emissions is most likely what is to be expected as the permafrost under palsa mires degrades in response to climate warming.