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| Titel |
Storm Effects on Net Ecosystem Productivity in Boreal Forests |
| VerfasserIn |
Patrik Vestin, Achim Grelle, Fredrik Lagergren, Margareta Hellström, Ola Langvall, Anders Lindroth |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041191
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| Zusammenfassung |
| Regional carbon budgets are to some extent determined by disturbance in ecosystems.
Disturbance is believed to be partly responsible for the large inter-annual variability of
the terrestrial carbon balance. When neglecting anthropogenic disturbance, forest
fires have been considered the most important kind of disturbance. However, also
insect outbreaks and wind-throw may be major factors in regional carbon budgets.
The effects of wind-throw on CO2 fluxes in boreal forests are not well known due
to lack of data. Principally, the reduced carbon sequestration capacity, increased
substrate availability and severe soil perturbation following wind-throw are expected to
result in increased CO2 fluxes from the forest to the atmosphere. In January 2005,
the storm Gudrun hit Sweden, which resulted in approx. 66 -
106m3storm-felled
stem wood distributed over an area of approx. 272 000 ha. Eddy covariance flux
measurements started at storm-felled areas in Asa and Toftaholm in central Sweden during
summer 2005. Data from the first months suggests increased CO2 fluxes by a factor of
2.5-10, as compared to normal silviculture (clear-cutting). An important question
is how long such enhanced CO2 fluxes persist. The BIOME-BGC model will be
calibrated against measured CO2 fluxes from both sites for 2005 through 2009.
Modeled data will be used to fill gaps in the data sets and annual carbon balances will
be calculated. Data from Asa and Toftaholm will be presented at the conference. |
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