Pleistocene variations of beryllium isotopes in central Arctic Ocean sediment cores

Sellén, Emma; Kubik, Peter W.

doi:10.1016/j.gloplacha.2009.03.024

Cited by 27 publications

(20 citation statements)

References 52 publications

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“…In this study, a 10 Be/ 9 Be derived chronology, acquired at a higher sampling resolution than the ACEX cores, provides an order of magnitude slower sedimentation rate when compared to constraints from biostratigraphic, cyclostratigraphic and amino acid racemization analyses (Sellé n et al, 2009). This discrepancy is attributed to a lower 10 Be/ 9 Be ratio of seawater in Amerasian Basin cores during the later part of the Pleistocene.…”

Section: Stratigraphic Correlation and Cyclostratigraphymentioning

confidence: 91%

Plio-Pleistocene trends in ice rafted debris on the Lomonosov Ridge

O’Regan

John

Moran

et al. 2010

Quaternary International

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a b s t r a c tAlthough more than 700 sediment cores exist from the Arctic Ocean, the Plio-Pleistocene evolution of the basin and its marginal seas remains virtually unknown. This is largely due the shallow penetration of most of these records, and difficulties associated with deriving chronologies for the recovered material. The Integrated Ocean Drilling Program's (IODP) Expedition 302 (Arctic Coring Expedition, ACEX) recovered 197 m of Neogene/Quaternary sediment from the circumpolar regions of the Lomonosov Ridge. As detailed analyses of this material emerge, research is beginning to formulate a long-term picture of paleoceanographic changes in the central Arctic Ocean. This paper reviews the ACEX PlioPleistocene age model, identifies uncertainties, and addresses ways in which these may be eliminated. Within the established stratigraphic framework, a notable reduction in the abundance of ice rafted debris (IRD) occurs in the early part of the Pleistocene and persists until Marine Isotope Stage 6 (MIS 6). Therefore, while global oceanographic proxies indicate the gradual growth of terrestrial ice-sheets during this time, IRD delivery to the central Arctic Ocean remained comparatively low and stable. Within the resolution of existing data, the Pleistocene reduction in IRD is synchronous with predicted changes in both the inflow of North Atlantic and Pacific waters, which in modern times are known to exert a strong influence on sea ice stability.

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Section: Stratigraphic Correlation and Cyclostratigraphymentioning

confidence: 91%

Plio-Pleistocene trends in ice rafted debris on the Lomonosov Ridge

O’Regan

John

Moran

et al. 2010

Quaternary International

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“…After age correction this still suggests that the Be isotope ratio of deep water in the Canada Basin was significantly lower than it is today during extended periods of the past several 100 kyr, implying that either the supply of 10 Be was significantly lower or that of 9 Be was higher than today. Based on sediment cores from the Alpha and Mendeleev Ridge that were independently dated using nanofossil stratigraphy (Backman et al, 2009), Sellén et al (2009 argued that superimposed on the radioactive decay there were significant reductions in 10 Be supply to the sediments due to prolonged periods of denser sea ice cover resulting in very low 10 Be/ 9 Be ratios in Arctic sediments for the past 1 Myr, except during the Holocene. This is supported by Be isotope time (Zachos et al, 2001).…”

Section: Age Models Based On 10 Be/ 9 Bementioning

confidence: 99%

“…Jakobsson et al, 2000) but there is still debate on the age models of sediments in the western Arctic Ocean (e.g. Sellén et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

The evolution of climatically driven weathering inputs into the western Arctic Ocean since the late Miocene: Radiogenic isotope evidence

Dausmann

Siebert

Christl

et al. 2015

Earth and Planetary Science Letters

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“…2) is based on the correlation of IRD (mostly detrital carbonate), sand layers, and calcareous microfossil enrichments (Jokat et al, 2009;Matthiessen et al, 2010;Stein et al, 2010a) with the well-dated HOTRAX core HLY0503-8JPC ($12 m long; 79°35.6 0 N, 172°30.1 0 W; 2792 m water depth; Fig. 1; Adler et al, 2009;Darby et al, 2009;Polyak et al, 2009;Sellén et al, 2009;Jakobsson et al, 2010 and references therein). Based on amino acid racemization and the occurrence of foraminifera, Adler et al (2009) identified marine isotope stage (MIS) 5.5 (about 130 ka B.P.)…”

Section: Preliminary Stratigraphy and Age Modelmentioning

confidence: 99%