10Be records from sediments of the Arctic ocean covering the past 350 ka

A. A. Aldahan, Shi Ning, G. Possnert, J. Backman, K. Boström

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Records of 10Be, 9Be, mineralogy and grain size were obtained from two cores collected by the Polarstem 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/cm2 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 10Be concentration (atoms/g) and flux (atoms/cm2 ka) are inverse to sediment flux, where high 10Be concentration and flux are associated with generally low sedimentation/accumulation rates during interglacial periods. We hypothesize that climate plays an important role in 10Be records from the Arctic sediments, reflecting the intensity and distribution of the ice mass on land and the ocean.

Original languageEnglish
Pages (from-to)147-162
Number of pages16
JournalMarine Geology
Volume144
Issue number1-3
DOIs
Publication statusPublished - Dec 1997
Externally publishedYes

Keywords

  • Arctic
  • Beryllium
  • Climate
  • Environment
  • Sediment

ASJC Scopus subject areas

  • Oceanography
  • Geology
  • Geochemistry and Petrology

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