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| Titel |
Observations of wetland methane fluxes in West Siberia with automated chamber system |
| VerfasserIn |
Shamil Maksyutov, Oleg Krasnov, Valentin Shelevoi, Alexander Nadeev, Mikhail Glagolev |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250075104
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| Zusammenfassung |
| An automatic sampling and analysis system for measuring methane and CO2 fluxes from soil
was developed and applied to the flux measurements at boreal wetland near Plotnikovo,
Tomsk region in the southern part of West Siberia in 2012. Measurements were performed on
mesotrophic open bog at the bog periphery. Solar powered automated system is used to open
and close six static chambers equipped with air actuators. Analysis system uses
semiconductor sensor for methane and NDIR for carbon dioxide. Air and soil temperatures,
as well as groundwater table are recorded. Seasonal variations of the emissions summarized
as weekly mean fluxes correlate well with soil temperature. Season-high fluxes vary from 3.9
to 22 mgCH4/m2/h between chambers. The vegetation map created from high resolution
aerial photos and ground survey data was used for analysis of the spatial flux distribution. The
methane and CO2 fluxes appear clearly related to the vegetation and soil conditions.
Higher emission rates are observed over waterlogged surfaces with presence of
sedge and cotton-grass while lowest emission rates correspond to dry hummocks. |
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