Journal article

Large-scale climate signals of a European oxygen isotope network from tree rings

Daniel F Balting, Monica Ionita, Martin Wegmann, Gerhard Helle, Gerhard H Schleser, Norel Rimbu, Mandy B Freund, Ingo Heinrich, Diana Caldarescu, Gerrit Lohmann

Climate of the Past | Copernicus GmbH

Abstract

Abstract. We investigate the climate signature of δ18O tree-ring records from sites distributed all over Europe covering the last 400 years. An empirical orthogonal function (EOF) analysis reveals two distinct modes of variability on the basis of the existing δ18O tree-ring records. The first mode is associated with anomaly patterns projecting onto the El Niño–Southern Oscillation (ENSO) and reflects a multi-seasonal climatic signal. The ENSO link is pronounced for the last 130 years, but it is found to be weak over the period from 1600 to 1850, suggesting that the relationship between ENSO and the European climate may not be stable over time. The second mode of δ18O variability, which captu..

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