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| Titel |
Carbon dioxide and methane fluxes measured by static chamber technique at the Bakchar bog ecosystem, West Siberia |
| VerfasserIn |
Alexandre V. Fofonov, Shamil Sh. Maksyutov, Denis K. Davydov, Oleg A. Krasnov, Mikhail V. Glagolev, Gen Inoue, Boris D. Belan, Mikhail Yu. Arshinov |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250147306
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| Publikation (Nr.) |
 EGU/EGU2017-11455.pdf |
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| Zusammenfassung |
| Measurements of CO2 and CH4 fluxes were carried out at the Bakchar bog (56˚ 51.29’N,
E82˚ 50.91’E) which is a part of the Great Vasyugan Mire. Measurements were
performed by two solar powered automated systems (Flux-NIES) consisted of NDIR
Li-820 CO2 analyzer, an improved SnO2–based methane sensor (Suto and Inoue,
2010), six static chambers installed along different toposequences, the air drying and
distribution unit, and a datalogger. Three field campaigns have been undertaken during the
period from May to October in 2014, 2015, and 2016 at two types of open wetlands:
mesotrophic open bog and patterned wetland with forested ridges, flat hollows and water
pools.
Observed carbon dioxide fluxes showed that net uptake of CO2 predominates from the
beginning of June through the end of August with a maximum from mid-June through the
end of July. Seasonal pattern of methane fluxes showed that CH4 emission increases rapidly
at the beginning of June, but its weakening in autumn lasts gradually. Seasonal variation of
the emissions correlates well with the soil temperature. At the patterned wetland, methane
fluxes showed correlation with the gross CO2 uptake rate derived from the daytime NEE and
nighttime respiration of ecosystems.
Suto, H. and Inoue, G. 2010. A new portable instrument for in-situ measurement of
atmospheric methane mole fraction by applying an improved tin dioxide-based gas sensor. J.
Atmos. Ocean. Tech. 27, 1175–1184. |
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