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Last glacial ice-rafted debris off southwestern Europe: the role of the British-Irish Ice Sheet
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology (INK).
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2010 (English)In: Journal of Quaternary Science, ISSN 0267-8179, E-ISSN 1099-1417, Vol. 25, no 5, 689-699 p.Article in journal (Refereed) Published
Abstract [en]

Ice-rafted debris (IRD) seeded into the ocean from Northern Hemisphere ice sheets is found in ocean cores along the southwestern European margin through the last glacial period. It is known that the origin of this IRD, especially off Iberia, can vary between North America and western Europe during short-lived episodes of greatly enhanced iceberg flux, known as Heinrich events, although in most Heinrich events the IRD has a North American source. During the longer times of much lower IRD fluxes between Heinrich events, use of an intermediate complexity climate model, coupled to an iceberg dynamic and thermodynamic model, shows that background levels of IRD most likely originate from western Europe, particularly the British Irish Ice Sheet. Combining modelling with palaeoceanographic evidence supports reconstructions of a short-lived, but substantial, Celtic and Irish Sea Ice Stream around 23 ka.

Place, publisher, year, edition, pages
2010. Vol. 25, no 5, 689-699 p.
Keyword [en]
ice-rafted debris, Iberian margin, British-Irish Ice Sheet, iceberg model, Polar Front, climate model
National Category
Natural Sciences
URN: urn:nbn:se:su:diva-50525DOI: 10.1002/jqs.1345ISI: 000280448000008OAI: diva2:381627
authorCount :8Available from: 2010-12-28 Created: 2010-12-28 Last updated: 2010-12-28Bibliographically approved

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Greenwood, Sarah L.
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Department of Physical Geography and Quaternary Geology (INK)
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