Sabrekov A.F.1), Glagolev M.V.1), 2), 3), Kleptsova I.E.2), Bashkin V.N.4), Barsukov P.А.5), 6), Maksutov S.S.7)
1) Lomonosov Moscow state university
2) Yugra state university, Khanty-Mansiysk
3) Tomsk state pedagogical university
4) OOO «Gazprom VNIIGAZ», Moscow
5) Soil science and agrochemistry institute of SB RAS, Nobosibirsk
6) Tomsk state university
7) National institute of environmental studies, Tsukuba, Japan
Methane flux measurements using static chamber technique were carried out on a palsa site («Yamburg», 67.97° N, 75.4° E) in the south tundra subzone of West Siberia in August 2011. Despite the fact that palsa is the second most common type of wetland microlandscapes in West Siberian tundra, our knowledge about methane fluxes from this microlandscape is still very limited.
The mean methane flux value from West Siberian tundra palsas was 0.13 ± 0.29 mgC-СН4•m-2•h-1. Obtained results were used in the new version (Bc9) of the “standard model” for regional methane fluxes, developed by the authors. It was found that despite the large coverage in the tundra zone of Western Siberia, palsa emits only 1.9 Gg С-СН4•year-1, or 2% of the regional methane flux from tundra wetlands, estimated as 0.1087 Tg С-СН4•year-1, which in turn is about 4% of the total methane flux from West Siberian wetlands.
We compared CH4 flux data from two most abundant microlandscapes, palsas and eutrophic hollows, with similar data obtained by other authors over the whole Eurasian tundra. Comparison showed that variations in methane emission rates within each microlandscape are insignificant and can be caused by the interannual variability and different ecological and climatic conditions. Evaluation of different variability types including spatial and temporal variability showed that the uncertainty of obtained fluxes is close to the theoretically expected rate.
Key words: methane emission, tundra, West Siberia, wetlands, palsa.
Citation: Sabrekov A.F., Glagolev M.V., Kleptsova I.E., Bashkin V.N., Barsukov P.A., Maksyutov S.S. 2011. Contribution of palsa to methane emission from West Siberian tundra wetlands // Environmental Dynamics and Global Climate Change. V. 2. № 2(4). EDССrar0002.