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Titolo
Reconstrucción de paleotemperaturas en el golfo de León durante los estadios isotópicos 6 y 7 utilizando la técnica de los análogos modernos
Otros títulos
Paleotemperature estimates in the Gulf of Lions during Marine Isotope Stages 6 and 7 based on the modern analog technique
Autor(es)
Soggetto
Paleoclimatología
Técnica de los análogos modernos
León, Golfo de
Estadios isotópicos marinos
Modern analog tecnique
Sea surface temperatures
Gulf of Lions
Marine isotope stages 6 and 7
Fecha de publicación
2008
Editore
Sociedad Geológica de España (Madrid, España)
Citación
González-Mora, B., Sierro Sánchez, F. Javier y Berné, S. (2008). Reconstrucción de paleotemperaturas en el golfo de León durante los estadios isotópicos 6 y 7 utilizando la técnica de los análogos modernos. "Geogaceta", 44, 75-78
Resumen
Planktonic foraminifer assemblages from core PRGL1-4 have been studied to reconstruct sea surface temperatures (SST) in the Gulf of Lions during Marine Isotope Stages 6 and 7 based on the modern analog technique. This method consists of a comparison between core and modern sample assemblages assuming that similar planktonic foraminifer assemblages develop under the same ecological conditions and thatforaminifer ecological preferences have not changed in time. During stage 6 (glacial) a strong millennial variability is observed in SST, whereas in stage 7 (interglacial) the astronomical forcing controls SST. These features have been already reported in temperature records from other areas out of the MediterraneanSea, which means that SST in the Gulf of Lions during stages 6 and 7 was influenced by global climatechanges. Moreover, some differences exist between paleotemperature records from different areas in the Mediterranean region. In the Gulf of Lions temperature records are more extreme since this area is directly influenced by Mistral and Tramontane winds, which cause important water cooling during cold periods.Furthermore, this study suggests that seasonality in the Gulf of Lions is not influenced by Northern Hemisphere summer insolation.
Descrizione
Se analiza la estimación de las paleotemperaturas del agua superficial del Golfo de León, desarrollada a través de la técnica de los análogos modernos, método importante para la reconstrucción de las corrientes que afectan a esa zona.
URI
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