Estimation of methane fluxes in the ecosystem of the palsa mire in the far northern taiga subzone in the European Northeast of Russia (according to the results of two measurement methods)
S. V. Zagirova1, M. N. Miglovets1, S. V. Yakubenko2
1Institute of Biology, Federal Komi Science Center, Ural Branch, Russian Academy of Sciences, Syktyvkar, Russia
2State University named after Pitirim Sorokin, Syktyvkar, Russia
Keywords: palsa mire, far northern taiga, methane, fluxes, static chamber method, eddy covariance
Abstract
The article presents an estimate of methane emission in palsa mire in the European North-East of Russia based on the results of measurements by the method of static chambers and eddy covariance during the growing season. Hollows make the main contribution to the ecosystem flux, the rate of methane emission per season on these relief elements averaged 5,7 mg/(m2∙h) and was controlled by soil temperature and groundwater level. The methane emission on the ridges and the peat mound was noticeably lower and corresponded to 0,85 and 0,28 mg/(m2∙h). On the peat mound, the methane flux depended on the thickness, temperature, and humidity of the active peat layer. The cumulative ecosystem flux of methane into the atmosphere in May-September, obtained by the method of chambers and eddy covariance, corresponded to 9,5 and 11,4 g/m2.
|
