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North-south palaeohydrological contrasts in the central Mediterranean during the Holocene: tentative synthesis and working hypotheses 5
Magny, Michel; Combourieu Nebout, Nathalie; De Beaulieu, Jacques-louis; Bout-roumazeilles, Viviane; Colombaroli, D.; Desprat, Stephanie; Francke, A.; Joannin, Sebastien; Ortu, Elena; Peyron, Odile; Revel, Marie; Sadori, Laura; Siani, Giuseppe; Sicre, Marie-alexandrine; Samartin, S.; Simonneau, A.; Tinner, Willy; Vanniere, Boris; Wagner, B.; Zanchetta, Giovanni; Anselmetti, Flavio S.; Brugiapaglia, E.; Chapron, Emmanuel; Debret, Maxime; Desmet, Marc; Didier, Jean; Essallami, Latifa; Galop, D.; Gilli, A.; Haas, J.n.; Kallel, Nejib; Millet, L.; Stock, Andy; Turon, Jean-louis; Wirth, S..
On the basis of a multi-proxy approach and a strategy combining lacustrine and marine records along a north-south transect, data collected in the central Mediterranean within the framework of a collaborative project have led to reconstruction of high-resolution and well-dated palaeohydrological records and to assessment of their spatial and temporal coherency. Contrasting patterns of palaeohydrological changes have been evidenced in the central Mediterranean: south (north) of around 40 degrees N of latitude, the middle part of the Holocene was characterised by lake-level maxima (minima), during an interval dated to ca. 10 300-4500 cal BP to the south and 9000-4500 cal BP to the north. Available data suggest that these contrasting palaeohydrological...
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Ano: 2013 URL: https://archimer.ifremer.fr/doc/00264/37570/36902.pdf
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The Last Termination in the South Indian Ocean: A unique terrestrial record from Kerguelen Islands (49 ° S) situated within the Southern Hemisphere westerly belt 5
Van Der Putten, Nathalie; Verbruggen, Cyriel; Bjorck, Svante; Michel, Elisabeth; Disnar, Jean-robert; Chapron, Emmanuel; Moine, Bertrand N.; De Beaulieu, Jacques-louis.
The awareness of the significance of the Southern Ocean in the Earth's climate system has become increasingly obvious. The deglacial atmospheric CO2 rise during warming periods in Antarctica has been attributed to CO2 ventilation from the deep ocean caused by enhanced upwelling around the Antarctic Divergence. It has been hypothesized that, more intense Southern Hemisphere westerly winds aligned with the Antarctic Circumpolar Current due to a southward shift of the wind belt from its Last Glacial Maximum equator-ward position, are the main drivers. Reconstructions of past changes in atmospheric circulation in the Southern Hemisphere are still scarce and the overall picture is patchy with sometimes contradictory results. For obvious reasons, most...
Tipo: Text Palavras-chave: Palaeoclimatology; Last Termination; Peat record; Kerguelen Islands; Southern Ocean; Indian Ocean; Oceanic Cold Reversal; Southern Hemisphere westerly belt.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00497/60843/64283.pdf
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