1. Signal strength and climate calibration of a European tree-ring isotope network
- Author
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Treydte, K., Frank, D., Esper, J., Andreu, L., Bednarz, Z., Berninger, F., Böttger, Tatjana, D'Alessandro, C.M., Etien, N., Filot, M., Grabner, M., Guillemin, M.T., Gutierrez, E., Haupt, Marika, Helle, G., Hilasvuori, E., Jungner, H., Kalela-Brundin, M., Krapiec, M., Leuenberger, M., Loader, N.J., Masson-Delmotte, V., Pazdur, A., Pawelczyk, S., Pierre, M., Planells, O., Pukiene, R., Reynolds-Henne, C.E., Rinne, K.T., Saracino, A., Saurer, M., Sonninen, E., Stievenard, M., Switsur, V.R., Szczepanek, M., Szychowska-Krapiec, E., Todaro, L., Waterhouse, J.S., Weigl, M., Schleser, G.H., Treydte, K., Frank, D., Esper, J., Andreu, L., Bednarz, Z., Berninger, F., Böttger, Tatjana, D'Alessandro, C.M., Etien, N., Filot, M., Grabner, M., Guillemin, M.T., Gutierrez, E., Haupt, Marika, Helle, G., Hilasvuori, E., Jungner, H., Kalela-Brundin, M., Krapiec, M., Leuenberger, M., Loader, N.J., Masson-Delmotte, V., Pazdur, A., Pawelczyk, S., Pierre, M., Planells, O., Pukiene, R., Reynolds-Henne, C.E., Rinne, K.T., Saracino, A., Saurer, M., Sonninen, E., Stievenard, M., Switsur, V.R., Szczepanek, M., Szychowska-Krapiec, E., Todaro, L., Waterhouse, J.S., Weigl, M., and Schleser, G.H.
- Abstract
We present the first European network of tree ring d 13C and d 18O, containing 23 sites from Finland to Morocco. Common climate signals are found over broad climatic-ecological ranges. In temperate regions we find positive correlations with summer maximum temperatures and negative correlations with summer precipitation and Palmer Drought Severity Indices (PDSI) with no obvious species-specific differences. Regional d 13C and d 18O chronologies share high common variance in year-to-year variations. Long-term variations, however, exhibit differences that may reflect spatial variability in environmental forcings, age trends and/or plant physiological responses to increasing atmospheric CO2 concentration. Rotated principal component analysis (RPCA) and climate field correlations enable the identification of four sub-regions in the d 18O network - northern and eastern Central Europe, Scandinavia and the western Mediterranean. Regional patterns in the d 13C network are less clear and are timescale dependent. Our results indicate that future reconstruction efforts should concentrate on d 18O data in the identified European regions.
- Published
- 2007