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Be-10 records from sediments of the Arctic Ocean covering the past 350 ka
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1997 (English)In: Marine Geology, ISSN 0025-3227, E-ISSN 1872-6151, Vol. 144, no 1-3, 147-162 p.Article in journal (Refereed) Published
Abstract [en]

Records of Be-10, Be-9, mineralogy and grain size were obtained from two cores collected by the Polarstern Expedition 1991 in the southern Nansen Basin (Core 2213-6) and the Yermak Plateau (Core 2208-2). The accumulation of sediments examined started from about 350 ka (BP), and includes relatively well defined trends of Be isotopes coincident with interglacial/glacial climatic cycles. Sediment accumulation rates (g/cm(2) ka) were higher during glacial periods and our estimates of 1.0 and 2.5 cm/ka sedimentation rates during the Holocene agree with other estimates for the southern Nansen Basin and the Yermak Plateau, respectively. The variations in Be-10 concentration (atoms/g) and flux (atoms/cm(2) ka) are inverse to sediment flux, where high Be-10 concentration and flux are associated with generally low sedimentation/accumulation rates during interglacial periods. We hypothesize that climate plays an important role in Be-10 records from the Arctic sediments, reflecting the intensity and distribution of the ice mass on land and the ocean. (C) 1997 Elsevier Science B.V.

Place, publisher, year, edition, pages
1997. Vol. 144, no 1-3, 147-162 p.
Keyword [en]
Arctic; beryllium; climate; environment; sediment
National Category
Natural Sciences
Research subject
SWEDARCTIC 1991, Arctic Ocean 1991
Identifiers
URN: urn:nbn:se:polar:diva-3337DOI: 10.1016/S0025-3227(97)00084-4OAI: oai:DiVA.org:polar-3337DiVA: diva2:1055546
Available from: 2016-12-12 Created: 2016-12-12 Last updated: 2016-12-12

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