Stable oxygen isotopes (δ 18O) in Austrocedrus chilensis tree rings reflect climate variability in northwestern Patagonia, Argentina
| Autor: | F. A. Roig, J. A. Boninsegna, R. Siegwolf |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Atmospheric Science
geography geography.geographical_feature_category Ecology Cupressaceae biology δ18O Climate Health Toxicology and Mutagenesis Argentina Oxygen Isotopes biology.organism_classification Isotopes of oxygen Trees El Niño Southern Oscillation Foothills Tree (set theory) Austrocedrus Environmental Monitoring Chronology |
| Zdroj: | International Journal of Biometeorology. 51:97-105 |
| ISSN: | 1432-1254 0020-7128 |
| DOI: | 10.1007/s00484-006-0049-4 |
| Popis: | The stable oxygen isotope (delta (18)O) composition of Austrocedrus chilensis (D. Don) Endl. (Cupressaceae) tree rings potentially provide retrospective views of changes in environment and climate in the semi-arid lands of Patagonia. We report the development of the first annually resolved delta (18)O tree-ring chronology obtained from natural forests of the foothills of the northwestern Patagonian Andes. The isotope record spans between 1890 and 1994 AD. We explore the probable links between this record and the climate of the region. Air temperatures during summer conditions are significantly, but not strongly, inversely correlated with annual delta (18)O values from Austrocedrus tree rings. The strongest correlations are between the southern oscillation index (SOI) and the tree rings. The existence of millennial-age Austrocedrus trees in northern Patagonia provides interesting possibilities for examining these climate-related isotopic signals over most of the last 1,000 years. |
| Databáze: | OpenAIRE |
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