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| Titel |
Carbon dioxide dynamics of a boreal peatland over a complete growing season, Komi Republic, NW Russia |
| VerfasserIn |
J. Schneider, L. Kutzbach, M. Gažovič, U. Wolf, M. Miglovec, O. Michajlov, C. Wille, P. Schreiber, J. Ibendorf, M. Wilmking |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025868
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| Zusammenfassung |
| This study focuses on carbon dioxide dynamics of a boreal peatland ecosystem in northern
Russia. Recently, the boreal peatlands have been subject to many speculations in relation to
climate change effects and greenhouse gas exchange. Peatlands are well known
to be a longterm sink for atmospheric carbon dioxide, but in a changing climate,
the CO2 fluxes can be significantly changed, and peatlands may even become an
atmospheric carbon source. The Russian boreal zone covers vast areas, and peatlands are
major ecosystems of this region. However, still little scientific evidence is available
from this region. Our studied peatland is located at 61Ë 56’N, 50Ë 13’E in the
European part of northern Russia. We determined net ecosystem CO2 exchange and its
components ecosystem respiration and gross photosynthesis using the closed chamber
technique. It is important to quantify the CO2 fluxes, but we also need to improve our
understanding how the ecosystem-atmosphere interactions are controlled. To do so, we
measured a wide range of meteorological parameters and quantified vegetation
characteristics by measuring the foliage cover (LAI) and green area of vascular leaves.
The few studies reporting CO2 fluxes from boreal peatlands in Russia all focus on
measurements during summer time. To improve our understanding of the CO2 flux
dynamics of a peatland over the year, further research on the CO2 dynamics during the
spring and autumn seasons was needed. We started the field measurements on the
25th of April during the snow melt and continued until the end of the vegetation
period and the first frost on the 20th of October 2008. Here, we present the CO2
dynamics and budget for the investigation period and discuss the regulating factors. |
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