Conexiones climáticas de escala milenaria entre procesos oceánicos y atmosféricos durante el Último Ciclo Glaciar: estudio multidisciplinar de un sondeo del Mar de Alborán (Mediterráneo occidental).
- A. Moreno 1
- I. Cacho 2
- M. Canals 2
- J.O. Grimalt 3
- M.F. Sánchez-Goñi 4
- F.J. Sierro 5
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1
Instituto Pirenaico de Ecología
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2
Universitat de Barcelona
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3
Consejo Superior de Investigaciones Científicas
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4
Ecole Pratique des Hautes Etudes
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5
Universidad de Salamanca
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ISSN: 0214-2708
Any de publicació: 2007
Volum: 20
Número: 1-2
Pàgines: 31-52
Tipus: Article
Altres publicacions en: Revista de la Sociedad Geológica de España
Resum
The large dataset obtained from the extensive study of IMAGES core MD95-2043 recovered from the Alboran Sea (Western Mediterranean) shows the periodicities and phase relationships of oceanographic and atmospheric processes on a millennial timescale. The 1470-yr cycle is the most significant, with the exception of the records reflecting climatic or environmental changes on land which show statistically significant 3300 and 8000 frequency bands. The investigation of these core records on a millennial scale resolution allows us to establish the evolution of oceanographic and atmospheric mechanisms that influenced the Western Mediterranean region in the course of the Dansgaard/Oeschger cycles. Accordingly, possible land–sea interactions can be identified and situated in the context of the temporal succession of the different climatic processes. For instance, Saharan dust supply from Northern Africa appears to lead by 200 years some highlatitude climate changes. Although this observation needs to be tested by other studies from the same region, it suggests that low-latitude feedback processes were involved in forcing or transferring the millennial climatic variability in the westernmost Mediterranean.