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| Titel |
Intra-annual variations in the density and stable isotope composition of Norway spruce tree rings at the Tharandt FLUXNET site |
| VerfasserIn |
Lisa Wingate, Raphaël Dulhoste, Didier Bert, Barbara Köstner, Thomas Grünwald, Johannes Franke, Jerome Ogee |
| 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 |
250050175
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| Zusammenfassung |
| Long-term eddy covariance measurements of CO2 and water fluxes are essential to validate
forest ecosystem models. However, to test these models and improve our predictions over
longer time frames, complementary datasets are required. In this respect, high-resolution
intra-annual measurements of the carbon and oxygen stable isotope composition of cellulose
in annual tree rings (δ13Ccellulose and δ18Ocellulose, respectively) and wood density may
provide a solution. This is because well-defined seasonal patterns of plant carbon and
water dynamics are recorded in the tree ring cellulose over the growing season in
response to climatic variability. We explored this potential solution by collecting a
14-year, high-resolution cellulose dataset from Norway spruce trees growing in the
footprint of the Tharandt flux site located in Germany. The first results of this isotopic
and density analysis will be presented and interpreted using the on-site climatic
and physiological information monitored at the flux site for the past 14 years. In
addition the potential of using this detailed information to interpret plant function
and phenology back in time to the early 1900’s at this site will also be explored. |
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