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Atmospheric patterns driving Holocene productivity in the Alboran Sea (Western Mediterranean): A multiproxy approach 5
Ausin, Blanca; Flores, Jose A.; Sierro, Francisco J.; Cacho, Isabel; Hernandez-almeida, Ivan; Martrat, Belen; Grimalt, Joan O..
High-resolution paleoproductivity variations have been reconstructed in a productive cell in the Alboran Sea for the Holocene. Fossil coccolithophore assemblages have been studied along with the U37 k' -estimated sea-surface temperature ( SST) and other paleoenvironmental proxies. The appearance of this cell is suggested at 7.7 ka cal. BP and was linked to the establishment of the western anti-cyclonic gyre. From that time until the present, the nannofossil accumulation rate of Florisphaera profunda has revealed successive episodes of weakening and strengthening of upwelling conditions in the Alboran Sea that have been simultaneous to changes in Western Mediterranean Deep Water ( WMDW) formation in the Gulf of Lions. A two-phase scenario operating at...
Tipo: Text Palavras-chave: Alboran Sea; Coccolithophore productivity; Holocene; North Atlantic Oscillation; Western Mediterranean Deep Water.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00351/46265/46054.pdf
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Phase relationship between sea level and abrupt climate change 5
Sierro, Francisco J.; Andersen, Nils; Bassetti, Maria-angela; Berne, Serge; Canals, Miquel; Curtis, Jason H.; Dennielou, Bernard; Abel Flores, Jose; Frigola, Jaime; Gonzalez-mora, Beatriz; Grimalt, Joan O.; Hodell, David A.; Jouet, Gwenael; Perez-folgado, Marta; Schneider, Ralph.
Direct traces of past sea levels are based on the elevation of old coral reefs at times of sea level high-stands. However, these measurements are discontinuous and cannot be easily correlated with climate records from ice cores. In this study we show a new approach to recognizing the imprint of sea level changes in continuous sediment records taken from the continental slope at locations that were continuously submerged, even during periods of sea level lowstand. By using a sediment core precisely synchronized with Greenland ice cores, we were able to recognize major floods of the Mediterranean continental shelf over the past 270 kyr. During the last glacial period five flooding events were observed at the onset of the warmest Greenland interstadials....
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Ano: 2009 URL: https://archimer.ifremer.fr/doc/2009/publication-6969.pdf
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