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Last interglacial ocean changes in the Bahamas: climate teleconnections between low and high latitudes ArchiMer
Zhuravleva, Anastasia; Bauch, Henning A..
Paleorecords and modeling studies suggest that instabilities in the Atlantic Meridional Overturning Circulation (AMOC) strongly affect the low-latitude climate, namely via feedbacks on the Atlantic Intertropical Convergence Zone (ITCZ). Despite the pronounced millennial-scale overturning and climatic variability documented in the subpolar North Atlantic during the last interglacial period (MIS 5e), studies on cross-latitudinal teleconnections remain very limited. This precludes a full understanding of the mechanisms controlling subtropical climate evolution across the last warm cycle. Here, we present new planktic foraminiferal assemblage data combined with delta O-18 values in surface and thermocline-dwelling foraminifera from the Bahamas, a region...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00495/60691/65431.pdf
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Paleoceanographic and climatic teleconnections between the subarctic and subtropical North Atlantic during the last interglacial (MIS 5e) ArchiMer
Zhuravleva, Anastasia.
The last interglacial, MIS (Marine Isotope Stage) 5e, lasting from about ~129 to 116 ka, holds important implications for the projected global warming, as this geological interval is believed to have been significantly warmer-than-preindustrial. This thesis refines the current understanding of the MIS 5e paleoceanography in the subarctic and subtropical North Atlantic, providing new insights into ice-sheets dynamics and cross-latitudinal climatic teleconnections. For this purpose, a multi-proxy dataset comprising stable isotope compositions, foraminiferal assemblages and lithic as well as X-ray fluorescence data was produced using marine sediments from the Nordic Seas and the Bahama region. Several lines of evidence from the Nordic Seas suggest a strong...
Tipo: Text Palavras-chave: Last interglacial; MIS 5e; Greenland ice sheet; AMOC; ITCZ; Climatic variability letztes Interglazial; MIS 5e; Grönländisches Eisschild; AMOC; ITCZ; Klimatische Variabilität.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00495/60640/64136.pdf
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