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A cold and fresh ocean surface in the Nordic Seas during MIS 11: Significance for the future ocean
Kandiano, E.S.; Van der Meer, M.T.J.; Bauch, H.A.; Helmke, J.; Sinninghe Damsté, J.S.; Schouten, S. (2016). A cold and fresh ocean surface in the Nordic Seas during MIS 11: Significance for the future ocean. Geophys. Res. Lett. 43(20): 10,929–10,937.

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In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276; e-ISSN 1944-8007, meer
Peer reviewed article  

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Author keywords
    temperature reconstructions; reconstructions of salinity changes; the Nordic Seas; MIS 11

Auteurs  Top 
  • Kandiano, E.S., meer
  • Van der Meer, M.T.J., meer
  • Bauch, H.A.
  • Helmke, J.
  • Sinninghe Damsté, J.S., meer
  • Schouten, S., meer

    Paleoceanographical studies of Marine Isotope Stage (MIS) 11 have revealed higher-than-presentsea surface temperatures (SSTs) in the North Atlantic and in parts of the Arctic but lower-than-present SSTsin the Nordic Seas, the main throughflow area of warm water into the Arctic Ocean. We resolve thiscontradiction by complementing SST data based on planktic foraminiferal abundances with surface salinitychanges using hydrogen isotopic compositions of alkenones in a core from the central Nordic Seas. Thedata indicate the prevalence of a relatively cold, low-salinity, surface water layer in the Nordic Seasduring most of MIS 11. In spite of the low-density surface layer, which was kept buoyant by continuousmelting of surrounding glaciers, warmer Atlantic water was still propagating northward at the subsurfacethus maintaining meridional overturning circulation. This study can help to better constrain the impact ofcontinuous melting of Greenland and Arctic ice on high-latitude ocean circulation and climate.

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