Measuring the carbon budget of a sedge fen in Canada's Southern Arctic
Abstract
Arctic environments are currently experiencing climate warming. The fate of the carbon stored in soils that are often saturated and/or frozen in these regions is uncertain. Also uncertain are the rates of current carbon dioxide uptake as growing seasons lengthen and summer temperatures increase. To assess the response of the current carbon budget of an arctic sedge fen to interannual variations in growing season weather in the Daring Lake area (64deg52' N, 111deg34' W), we measured ecosystem-scale fluxes of carbon dioxide over three years (eddy covariance technique) and small plot-scale fluxes of methane (chamber technique). We then compared the contemporary carbon exchange with the apparent carbon accumulation for the past 2000 years obtained from carbon density and age-depth profile of a peat core.
- Publication:
-
AGU Spring Meeting Abstracts
- Pub Date:
- May 2009
- Bibcode:
- 2009AGUSM.H24B..01H
- Keywords:
-
- 0414 Biogeochemical cycles;
- processes;
- and modeling (0412;
- 0793;
- 1615;
- 4805;
- 4912);
- 0426 Biosphere/atmosphere interactions (0315);
- 0428 Carbon cycling (4806);
- 0475 Permafrost;
- cryosphere;
- and high-latitude processes (0702;
- 0716);
- 0497 Wetlands (1890)