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| Titel |
Effects of climatic variability and anomalies on the long term carbon dynamics in a temperate deciduous forest |
| VerfasserIn |
Jian Wu, Andreas Ibrom, Kim Pilegaard, Leon Gareth Linden, Claus Beier |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250057989
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| Zusammenfassung |
| Understand the spatiotemporal variability of carbon balance and their controls is
important for assessing the vulnerability of the carbon pools in the forest ecosystems
under future climate change scenarios. CO2 exchange over a beech forest near
Sorø, Denmark, was measured continuously over the past 13 years (1997-2009).
Simultaneous measurements of the environment variables in the atmosphere and
soil enable evaluation of the climate impact upon the ecosystem carbon dynamics.
Inter-annual variability of net ecosystem exchanges (NEE) of the forest ranges
from a source of 32 g m-2 year-1 in 1998 to a sink of -344 g m-2 year-1 in 2008.
This study aims to investigate the how climatic and phonological anomalies are
inter-connected and affect seasonal and inter-annual variations of carbon fluxes. Annual
fluxes anomaly are highly correlated with periodical flux anomaly (90 day moving window)
during the summer period, which is strongly influenced by summer water stress.
Functional change of the ecosystem is also investigated through estimated parameter
time series within and between years. The results suggest that combination climate
anomalies at different period of years will lead to either an "extreme" ecosystem
balance or counterbalance each other, result in an average ecosystem response. |
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