Wetland CO2 and CH4 fluxes were observed at the Bakchar bog (N56°51’, E82°51’), West Siberia. Measurements were performed by two solar powered automated systems (Flux-NIES), each consisting of NDIR CO2 analyzer, an SnO2-based methane sensor, six static chambers installed along transects, the air drying and distribution units, and a data-logger. Observations were made during the May to October period in 2014 to 2018 at two types of open wetlands: mesotrophic open bog (E-site) and patterned wetland with forested ridges, flat hollows and water pool (O-site). Each chamber is automatically opened and closed with pneumatic actuator. Water level is measured in the wetland and surrounding forest locations. On the basis of the conducted research, the daily dynamics for CO2 and CH4 fluxes was revealed. Correlation analysis made it possible to describe the dependences for CO2 and CH4 fluxes on the local hydrometeorological conditions of the surface. For example, the high flood of bog’s waters had a decreasing effect on the methane genesis during the period of observation and seasonal variation of the CH4 emissions correlates well with the soil temperature at peat bed depth. Wetland CO2 and CH4 fluxes correlate spatially: higher net uptake CO2 and CH4 emissions are observed at wet mesotrophic locations with higher photosynthesis/respiration rates; lower net uptake CO2 and CH4 emissions were observed on oligotrophic patterned wetland. Another objective for investigation was the integration of carbon fluxes from aquatic systems into terrestrial ones, in order to quantify and better understand the catchment scale carbon budget.
[1]
Yoshiki Yamagata,et al.
An image-based inventory of the spatial structure of West Siberian wetlands
,
2009
.
[2]
Oleg A. Krasnov,et al.
Measurements of methane and carbon dioxide fluxes on the Bakchar bog in warm season
,
2015,
Atmospheric and Ocean Optics.
[3]
Maarten B. Eppinga,et al.
Regular Surface Patterning of Peatlands: Confronting Theory with Field Data
,
2008,
Ecosystems.
[4]
Shamil Maksyutov,et al.
Mapping of West Siberian taiga wetland complexes using Landsat imagery:
implications for methane emissions
,
2016,
Biogeosciences.
[5]
J. Houghton,et al.
Climate Change 2013 - The Physical Science Basis: Working Group I Contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change
,
2014
.