Estratigrafía molecular aplicada a la reconstrucción de las temperaturas y las salinidades superficiales del Mar de Alborán desde la última glaciación

• l. Cacho ^[1] ; J. Targarona ^[1] ; M. Canals ^[1] ; K.-C. Emeis ^[2] ; H. Doose ^[3] ; B. Alonso ^[4] ; A.M. Calafat ^[1]
  1. [1] Dpto. Geol. Dinam. Geofís. i Paleontol, Univ. Barcelona
  2. [2] lnst. Ostseeforschung Warnemuende.
  3. [3] GEOMAR. Kiel.
  4. [4] U.A. Geociéncies Marines C.S.I.C.

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• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 5, 1996, págs. 1082-1085
• Idioma: español
• Títulos paralelos:
  • Molecular stratigraphy applicd to the reconstructions of the surface tempera tu res and salinities of the Alboran Sea from the Last Glacial period onwards
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• Resumen

  • Sea Surface Temperalures (SST) and salinity anomalies (L1S) of the Western Alboran Sea have been evaluated since Lhe Last Glacial maximum (78 ky Bp) using the Uk37 index. This molecular index is based on the determination of two thermic biomarkers which are fossilized in deep marine sediments. The results obtained indicate a warming of about 12ºC and higher salinities (L15=2,5%) than present during the last deglaciation (1 5-9 ky Bp). SST and L1S records evolution were not unidirectional along the last deglaciation (15-9 ky Bp); both records indicate a stepwise evolution in which the Younger Dryas and the last Heinrich event can be recognized. Early Holocene (9-5 ky Bp) is characlerized by a drop in salinity and high temperatures, conditions which are synchronous with the deposition of the last sapropel (S 1) in the Eastern Mediterranean.