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dc.contributor.authorFerrari, Raffaele
dc.contributor.authorJansen, Malte F.
dc.contributor.authorAdkins, Jess F.
dc.contributor.authorBurke, Andrea
dc.contributor.authorStewart, Andrew L.
dc.contributor.authorThompson, Andrew F.
dc.identifier.citationFerrari , R , Jansen , M F , Adkins , J F , Burke , A , Stewart , A L & Thompson , A F 2014 , ' Antarctic sea ice control on ocean circulation in present and glacial climates ' , Proceedings of the National Academy of Sciences of the United States of America , vol. 111 , no. 24 , pp. 8753-8758 .
dc.identifier.otherORCID: /0000-0002-3754-1498/work/64034534
dc.descriptionAll authors acknowledge support from the National Science Foundation. R.F. acknowledges support from the Breene M. Kerr Chair.en
dc.description.abstractIn the modern climate, the ocean below 2 km is mainly filled by waters sinking into the abyss around Antarctica and in the North Atlantic. Paleoproxies indicate that waters of North Atlantic origin were instead absent below 2 km at the Last Glacial Maximum, resulting in an expansion of the volume occupied by Antarctic origin waters. In this study we show that this rearrangement of deep water masses is dynamically linked to the expansion of summer sea ice around Antarctica. A simple theory further suggests that these deep waters only came to the surface under sea ice, which insulated them from atmospheric forcing, and were weakly mixed with overlying waters, thus being able to store carbon for long times. This unappreciated link between the expansion of sea ice and the appearance of a voluminous and insulated water mass may help quantify the ocean's role in regulating atmospheric carbon dioxide on glacial-interglacial timescales. Previous studies pointed to many independent changes in ocean physics to account for the observed swings in atmospheric carbon dioxide. Here it is shown that many of these changes are dynamically linked and therefore must co-occur.
dc.relation.ispartofProceedings of the National Academy of Sciences of the United States of Americaen
dc.subjectCarbon cycleen
dc.subjectIce ageen
dc.subjectOcean circulationen
dc.subjectSouthern Oceanen
dc.subjectGC Oceanographyen
dc.subjectGE Environmental Sciencesen
dc.subjectSDG 13 - Climate Actionen
dc.titleAntarctic sea ice control on ocean circulation in present and glacial climatesen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. St Andrews Isotope Geochemistryen
dc.contributor.institutionUniversity of St Andrews. Earth and Environmental Sciencesen
dc.description.statusPeer revieweden

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