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| Titel |
The climate-isotope relationship of tree-rings at temperate, high-altitude and high-latitude sites |
| VerfasserIn |
Matthias Saurer, Anne Kress, Olga Sidorova, Rolf Siegwolf |
| 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 |
250035462
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| Zusammenfassung |
| Tree-ring-width and latewood density provide climate information particularly at extreme
sites where growth is limited by a single factor. It is not clear, however, if this general
principle also holds for stable carbon isotope (δ13C) or oxygen isotope (δ18O) variations.
With increasing number of isotope studies and developing isotopic networks (ISONET,
MILLENNIUM), the influence of site conditions on the climate-isotope relationship can now
be systemically investigated. Our studies with trees growing in Europe and Siberia
indicate the following: (1) Significant climate-isotope relationship are found for
temperate regions where neither temperature nor precipitation are strongly limiting
growth (Saurer et al. 2008) (2) The climate signal does not depend as much on site
conditions as it does for tree-ring width and latewood density (3) A particularly
strong carbon isotope climate signal reflecting drought is found for an Alpine larch
chronology (Kress et al. 2009) (4) Isotopes at high-latitude Siberian sites contain a mixed
temperature-precipitation signal (Sidorova et al. 2009). Overall, we can state that stable
isotopes in tree-rings provide complimentary information to tree-ring width and
density and extend the geographical range as well as the derived climate parameters
significantly.
Kress, A., Saurer, M., Siegwolf, R.T.W., Frank, D.C., Esper, J. and Bugmann, H.:
A 350-year drought reconstruction from Alpine tree-ring stable isotopes. Global
Biogeochemical Cycles, in press
Saurer, M., Cherubini, P., Reynolds-Henne, C. E., Treydte, K. S., Anderson, W. T., and
Siegwolf, R. T. W.: An investigation of the common signal in tree ring stable isotope
chronologies at temperate sites, Journal of Geophysical Research-Biogeosciences, 113,
10.1029/2008jg000689, 2008.
Sidorova, O. V., Siegwolf, R. T. W., Saurer, M., Naurzbaev, M. M., Shashkin, A. V., and
Vaganov, E. A.: Spatial patterns of climatic changes in the Eurasian north reflected in
Siberian larch tree-ring parameters and stable isotopes Global Change Biology,
10.1111/j.1365-2486.2009.02008.x 2009.
This work was partially funded by the EU-project MILLENNIUM (no. 017008) and the
SNF-project 200021_121838 |
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