Late Weichselian Marine<sup>14</sup>C Reservoir Ages at the Western Coast of Norway

Bondevik, Stein; Birks, Hilary H.; Gulliksen, Steinar; Mangerud, J.

doi:10.1006/qres.1999.2048

Cited by 86 publications

(53 citation statements)

References 35 publications

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“…Bondevik et al (1999) also reported a marine reservoir age of 380 ± 32 BP (∆R = -20) for the west coast of Norway. Spatially, differences in regional ∆R values (Table 1) typically arise due to local hydrography (e.g.…”

Section: Discussionmentioning

confidence: 91%

Marine Radiocarbon Reservoir Ages in Scottish Coastal and Fjordic Waters

2006

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ABSTRACT. High freshwater inputs into Scottish sea lochs (fjords) combined with the restricted exchange between sea loch basin water and coastal Atlantic water masses are likely to result in reduced regional marine radiocarbon reservoir ages (R[t]) in these environments. To test this hypothesis, historical, museum-archived shells, collected live on known dates prior to AD 1950 from coastal locations in NW Scotland, were 14 C dated to provide a means of determining R(t) and hence the regional deviation (∆R) from the modeled global surface ocean reservoir age (R). The sea loch data, when combined with 14 C dates from the Scottish west coast (Harkness 1983), yield a regional ∆R value of -26 ± 14 yr. The ∆R of sea loch (fjordic) and coastal waters of NW Scotland are statistically different (at a confidence level >95%) from the ∆R value of 17 ± 14 yr reported for UK coastal waters (Reimer 2005; data after Harkness 1983) and are in good agreement with the coastal ∆R value of -33 ± 93 yr reported by Reimer et al. (2002). Therefore, it is recommended that a regional ∆R correction of -26 ± 14 yr should be applied to modern (i.e. pre-bomb but not prehistoric) marine 14 C dates from the NW coast of Scotland.

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Section: Discussionmentioning

confidence: 91%

Marine Radiocarbon Reservoir Ages in Scottish Coastal and Fjordic Waters

2006

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“…A former meltwater Age-depth model for lake Aspvatn ,200-10,790 11,255-10,740 10,995 *Corrected for marine 14 C reservoir age of 400 years (Bondevik et al, 1999) channel distal to M8 and M9 along the northern valley slope of Strupskardet links these marginal moraines to the L 0 sea level from the Younger Dryas (c. 12,800-11,500 cal. yr BP) (Figs.…”

Section: Discussionmentioning

confidence: 99%

Glacier fluctuations, equilibrium-line altitudes and palaeoclimate in Lyngen, northern Norway, during the Lateglacial and Holocene

et al. 2005

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Abstract:Based on lacustrine and morpho-stratigraphical evidence from Lyngen in Troms, northern Norway, thirteen marginal moraines have been mapped and dated in front of Lenangsbreene in Strupskardet. Moraines M1-M3 and M8-M9 are suggested orginally to be formed as ice-cored moraines, whereas M4-M7 and M10-M13 are suggested to be push and and melt-out moraines. A chronological framework, taking into account a combination of relict periglacial features, former shorelines and related glacier-meltwater channels, lichenometry, and AMS radiocarbon dated lacustrine sediments spanning the last 20,000 cal. yr BP, has been established. The proglacial lake Aspvatnet was isolated from the sea c. 10,300 cal. yr BP, and the lacustrine sediments have been investigated by use of LOI at 550/950ºC, magnetic susceptibility, water content, wet-and dry bulk density (DBD), and the magnetic parameters anhysteretic remanent magnetisation (ARM) and saturation remanent magnetisation (SIRM). There is in general good agreement between physical sediment parameters and magnetic parameters. DBD, a combination of medium and fine silt and the two statistical parameters 'sorting' and 'mean' have been used to construct a high-resolution glacier-fluctuation curve for the last 3800 cal. yr BP. Based on an accumulation-area ratio (AAR) of 0.6 and an adapted 'Little Ice Age ratio' (LR) approach, a continuous temperature-precipitation-wind equilibriumline altitude (TPW-ELA) curve for the last 20,000 cal. yr BP have been constructed. Using an established exponential relationship between mean ablation-season temperature and mean annual solid precipitation at the ELA of Norwegian glaciers, variations in mean winter precipitation as snow are quantified using an independent proxy for summer temperature. Mean annual winter precipitation varied from 500 to 5000 mm water equivalents, and on average, Holocene estimates is c. 50% higher than similar figures from the Lateglacial. The two driest periods occurred during Heinrich events 1 (H1) (17,500-16,500) and 0 (H0) (13,(0)(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)200), whereas freshwater pulses to the North Atlantic had apparently no systematic impact on mean winter precipitation. Based on the winter precipitation curve from Lyngen, the atmospheric circulation responded to the SST lowering associated with H1 and H0 events in Lyngen with formation of talusderived rock glaciers at sea level.

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“…However, the Vedde Ash Bed appears as a visible black layer 3 cm thick, 8 cm above the ingression contact. The Vedde Ash bed is found in a gyttja-silt unit with scattered cobbles and pebbles, probably produced by active frost weathering on the YD shoreline and dropped from seaice (Blikra and Longva, 1995;Bondevik et al, 1999;Bondevik and Mangerud, 2002). The existence of sea-ice is also indicated by the high occurrence of the sea-ice diatom Fragilariopsis cylindrus (Gersonde and Zielinski, 2000) throughout the unit.…”

Section: Langevatnet (503 M Asl) Lithostratigraphymentioning

confidence: 99%

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

Lohne¹,

Bondevik²,

Mangerud³

et al. 2004

J Quaternary Science

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Abstract:A detailed shoreline displacement curve documents the Younger Dryas transgression in western Norway. The relative sea-level rise was more than 9m in an area which subsequently experienced an emergence of almost 60 m. The sea-level curve is based on the stratigraphy of six isolation basins with bedrock thresholds. Effort has been made to establish an accurate chronology using a calendar year time-scale by 14C wiggle matching and the use of time synchronic markers (the Vedde Ash Bed and the postglacial rise in Betula (birch) pollen). The sea-level curve demonstrates that the Younger Dryas transgression started close to the Allerød-Younger Dryas transition and that the high stand was reached only 200 yr before the Younger Dryas-Holocene boundary. The sea level remained at the high stand for about 300 yr and 100 yr into Holocene it started to fall rapidly. The peak of the Younger Dryas transgression occurred simultaneously with the maximum extent of the ice-sheet readvance in the area. Our results support earlier geophysical modelling concluding a causal relationship between the Younger Dryas glacier advance and Younger Dryas transgression in western Norway. We argue that the sea-level curve indicates that the Younger Dryas glacial advance started in the late Allerød or close to the Allerød-Younger Dryas transition.

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Late Weichselian Marine¹⁴C Reservoir Ages at the Western Coast of Norway

Cited by 86 publications

References 35 publications

Marine Radiocarbon Reservoir Ages in Scottish Coastal and Fjordic Waters

Marine Radiocarbon Reservoir Ages in Scottish Coastal and Fjordic Waters

Glacier fluctuations, equilibrium-line altitudes and palaeoclimate in Lyngen, northern Norway, during the Lateglacial and Holocene

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

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Late Weichselian Marine14C Reservoir Ages at the Western Coast of Norway

Cited by 86 publications

References 35 publications

Marine Radiocarbon Reservoir Ages in Scottish Coastal and Fjordic Waters

Marine Radiocarbon Reservoir Ages in Scottish Coastal and Fjordic Waters

Glacier fluctuations, equilibrium-line altitudes and palaeoclimate in Lyngen, northern Norway, during the Lateglacial and Holocene

Calendar year age estimates of Allerød–Younger Dryas sea‐level oscillations at Os, western Norway

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Late Weichselian Marine¹⁴C Reservoir Ages at the Western Coast of Norway