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La cronología del último ciclo glacial en las montañas del Sur de Europa. Una revisión.

Authors: García-Ruiz, José María; Moreno Caballud, Ana; González-Sampériz, Penélope; Valero-Garcés, Blas L.; Martí Bono, Carlos Enrique;

La cronología del último ciclo glacial en las montañas del Sur de Europa. Una revisión.

Abstract

[ES] Este trabajo revisa las principales cronologías glaciares obtenidas en los macizos montañosos del sur de Europa mediante diferentes procedimientos. Los resultados permiten distinguir entre (i) glaciares que alcanzan su máxima extensión hacia 50,000 o incluso 80,000 años BP, es decir, con mucha antelación al Último Máximo Global, y (ii) glaciares que coinciden en su máximo avance con el Último Máximo Global (20,000-18,000 años calendario BP). En los primeros se han datado depósitos glaciolacustres y depósitos morrénicos mediante radiocarbono, OSL y series de Uranio-Torio, mientras en los segundos se ha datado la edad de exposición de superficies y bloques mediante elementos cosmogénicos (10Be y 36Cl). Los autores concluyen que un máximo muy anticipado en las montañas mediterráneas sería posible teniendo en cuenta su alta sensibilidad frente a cambios climáticos durante el último ciclo glaciar. Sin embargo, las diferencias entre glaciares situados en montañas del sur de Europa no pueden explicarse sólo atendiendo a factores geográficos (latitud, exposición) o de circulación general atmosférica. También hay que considerar los posibles errores en los distintos procedimientos de datación o las peculiares características de algunos de los puntos de muestreo seleccionados.

[EN]: This paper reviews the available glacial chronology in the Southern European mountains based on different dating procedures. The results distinguish between glaciers that reach their maximum extent ca. 50,000 or even 80,000 years B.P., that is, much earlier than the global Last Glacial Maximum, and (ii) glaciers whose maximum advance coincides with the global Last Glacial Maximum (20,000 – 18,000 cal. years BP). In the former ones glaciolacustrine and morainic deposits were dated using radiocarbon, OSL and U-Th series techniques, whereas in the second ones cosmogenic exposure ages of surfaces and boulders were obtained. The authors conclude that an early maximum advance of the Southern European glaciers would be possible taking into account their high sensitivity to climate changes during the last glacial cycle. Nevertheless, the differences between the glaciers located in the Southern European mountains can not be only explained by the geographic location (latitude, exposure) and the changes in the General Atmospheric Circulation. Errors in the dating procedures or in the selection of the sampling points have to be evaluated as responsible for the remarkable differences between Mediterranean mountains.

Este trabajo se ha llevado a cabo con el apoyo de los proyectos LIMNOCAL (CGL2006-13327- C04-01-CLI) y GRACCIE (CSD2007-00067), financiados por la CICYT (Ministerio de Ciencia y Tecnología), PN 53/2005, financiado por el Ministerio de Medio Ambiente, Medio Rural y Marino, y DGA-PM073/2007, financiado por el Gobierno de Aragón.

132 páginas, 2 figuras.

Peer reviewed

Keywords

Artículos de Investigación, Cosmogénicos, Last Glacial Maximum, Glacial chronology, Cronología glaciar, Cosmogenics, Radiocarbono, OSL, Último Máximo Global, Mediterranean mountains, Montañas mediterráneas, Radiocarbon

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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