Abstract
Micropaleontological and oxygen isotope analyses of planktonic foraminifera from North Atlantic Ocean and Southern Ocean sediment cores have been used to reconstruct temperature and salinity of surface waters during the last glacial maximum. Whereas the Norwegian-Greenland Sea and the high latitudes of the North Atlantic experienced a large negative anomaly, the Southern Ocean maintained salinity values similar or slightly higher than the modern ones around Antarctica, thus favouring winter convection and deep water formation in the Southern Hemisphere. These data have been used to force the zonally averaged, three-basin ocean model of Louvain-La-Neuve. The model reproduces the main trends of the geochemically constrained glacial Atlantic circulation and suggests that the glacial production of Antarctic Bottom Water was slightly higher than the modern one, whereas that of North Atlantic Deep Water was reduced by about 40%.
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Duplessy, J.C. et al. (1996). High Latitude Deep Water Sources During the Last Glacial Maximum and the Intensity of the Global Oceanic Circulation. In: The South Atlantic. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80353-6_24
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DOI: https://doi.org/10.1007/978-3-642-80353-6_24
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