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Título

Climate signal in varve thickness: Lake La Cruz (Spain), a case study

AutorLidia Romero-Viana, Lidia; Julià Brugués, Ramón ; Camacho, Antonio; Vicente, Eduardo; Miracle, Maria Rosa
Palabras claveCalcite
Laminated sediment
North Atlantic Oscillation (NAO)
Lake La Cruz
Varves
Paleoclimatic reconstruction
Fecha de publicaciónfeb-2008
EditorSpringer
CitaciónJournal of Paleolimnology
ResumenAbstract Lake La Cruz is a meromictic, karstic lake with annually laminated sediment formed by summer pulses of calcite deposition. The aim of this study was to explore the potential use of the laminated sediment from Lake La Cruz as a quantitative climate proxy, by calibrating lamina thickness against instrumental climate data. Statistical analysis of the relation between lamina thickness and the meteorological dataset indicated a high correlation between calcium carbonate lamina thickness and rainfall from December to March (r = 0.725, P < 0.01, n = 35). Winter rainfall anomalies in the area are, in turn, highly negatively correlated with the North Atlantic Oscillation index (NAO, r = −0.832; P < 0.01; n = 53). We propose a regression model to infer past winter rainfall from calcium carbonate laminae thickness. These results highlight new possibilities for paleoenvironmental research using calcite laminated sediment records as climate proxies, especially to study past rainfall variability.
Versión del editorhttp://www.springerlink.com/content/u0178kq8745115q0/fulltext.html
URIhttp://hdl.handle.net/10261/20201
DOI10.1007/s10933-008-9194-6
ISSN0921-2728
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