Publication Date:
2012-03-30
Description:
We described continuous measurements of CH 4 and CO 2 concentration obtained at two sites placed in the middle taiga, Karasevoe (KRS) and Demyanskoe (DEM), in West Siberian Lowland (WSL) from 2005 to 2009. Although both CH 4 and CO 2 accumulation (ΔCH 4 and ΔCO 2 ) during night-time at KRS in June and July 2007 showed an anomalously high concentration, higher ratios of ΔCH 4 /ΔCO 2 compared with those in other years indicated that a considerably higher CH 4 flux occurred relative to the CO 2 flux. The daily CH 4 flux calculated with the ratio of ΔCH 4 /ΔCO 2 and terrestrial biosphere CO 2 flux from an ecosystem model showed a maximum in July at the both sites. Although anomalously high flux was observed in June and July 2007 at KRS, only a small flux variation was observed at DEM. The high regional CH 4 flux in June and July 2007 at KRS was reproduced using a process-based ecosystem model, Vegetation Integrative Simulator for Trace gases (VISIT), in response to high water table depth caused by the anomalously high precipitation during the summer of 2007. Keywords: methane, Siberia, taiga, West Siberian Lowland, tower observation (Published: 28 March 2012) Citation: Tellus B 2012, 64 , 17514, DOI: 10.3402/tellusb.v64i0.17514
Print ISSN:
0280-6509
Electronic ISSN:
1600-0889
Topics:
Geography
,
Physics
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