Late Quaternary sedimentary processes and ocean circulation changes at the Southeast Greenland margin

Kuijpers, Antoon; Troelstra, S.R.; Prins, Maarten A.; Linthout, K.; Akhmetzhanov, A.; Bouryak, S; Bachmann, Martina; Lassen, Susanne; Rasmussen, S. O.; Jensen, Jørn Bo

doi:10.1016/s0025-3227(02)00684-9

Cited by 81 publications

(54 citation statements)

References 47 publications

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“…Koç Karpuz and Jansen (1992), Haflidason et al (1995), Kroon et al (1997) and Klitgaard-Kristensen et al (2001). A similar relatively warm Younger Dryas was also described by Björck et al (2002) from Lateglacial lake sediments in southern Greenland and by Kuijpers et al (2003) from the Southeast Greenland margin. Foraminiferal assemblages from a core on the Southwest Icelandic shelf, however, revealed a marked cooling, at least during the early part of the Younger Dryas .…”

Section: Comparison and Discussionsupporting

confidence: 52%

Environmental changes off North Iceland during the deglaciation and the Holocene: foraminifera, diatoms and stable isotopes

Knudsen

Jiang

Jansen

et al. 2004

Marine Micropaleontology

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A combined study of foraminifera, diatoms and stable isotopes in marine sediments off North Iceland records major changes in sea surface conditions since about 15800 cal years (yr) BP. Results are presented from two gravity cores obtained at about 400 m water depth from two separate sedimentary basins on each side of the submarine Kolbeinsey Ridge. The chronology of the sedimentary record is based partly on AMS 14 C dates, partly on the Vedde and the Saksunarvatn tephra markers, as well as the historical Hekla AD 1104 tephra. During the regional deglaciation, the planktonic foraminiferal assemblages are characterised by consistently high percentages of sinistrally coiled Neogloboquadrina pachyderma. However, major environmental variability is reflected by changes in stable isotope values and diatom assemblages. Low 18 O values indicate a strong freshwater peak as well as possible brine formation by sea-ice freezing during a pre-Bølling interval (Greenland Stadial 2), corresponding to the Heinrich 1 event. The foraminifera suggest a strong concurrent influence of relatively warm and saline Atlantic water, and both the foraminifera and the diatoms suggest mixing of cold and warm water masses. Similar but weaker environmental signals are observed during the Younger Dryas (Greenland Stadial 1) around the level of the Vedde Ash. Each freshwater peak is succeeded by an interval of severe cooling both at the beginning of the Bølling-Allerød Interstadial Complex (Greenland Interstadial 1) and during the Preboreal, presumably associated with the onset of intense deep water formatiom in the Nordic Seas. The Holocene thermal optimum, between 10200 and about 7000 cal years (yr) BP, is interrupted by a marked cooling of the surface waters around 8200 cal yr BP. This cold event is clearly expressed by a pronounced increase in the percentages of sinistrally coiled N. pachyderma, corresponding to a temperature decrease of about 3°C. A general cooling in the area is indicated after 7000-6000 cal yr BP, both by the diatom data and by the planktonic foraminiferal data. After a severe cooling around 6000 cal yr BP, the planktonic foraminiferal assemblages suggest a warmer interval between 5500 and 4500 cal yr BP. Minor temperature fluctuations are reflected both in the foraminiferal and in the diatom data in the upper part of the record, but the time resolution of the present data is not high enough to pick up details in environmental changes through the late Holocene.

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Section: Comparison and Discussionsupporting

confidence: 52%

Environmental changes off North Iceland during the deglaciation and the Holocene: foraminifera, diatoms and stable isotopes

Knudsen

Jiang

Jansen

et al. 2004

Marine Micropaleontology

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“…Kuijpers et al 2003). Fe/K values in atmospheric Saharan dust samples increase towards the equator (Stuut et al 2005).…”

Section: Fe/kmentioning

confidence: 97%

Twenty Years of XRF Core Scanning Marine Sediments: What Do Geochemical Proxies Tell Us?

Rothwell

Croudace

2015

Developments in Paleoenvironmental Research

138

128

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XRF core scanners, with their rapid and non-destructive analytical capability, have now been used for two decades in the analysis of marine sediments. Initially they were used to record variations in fundamental parameters such as calcium carbonate stratigraphy and terrigenous sediment delivery, using major element integrals, such as Ca and Fe, to provide detailed insights into oceanographic and climatic processes. In recent years, proxy selection has progressed to routine normalisation and presentation as log-ratios to include 60 elements or ratios to document a wide range of environmental and process changes. We review the development and application of XRF core scanning of marine sediments and discuss the basis of particular proxies, their uses and limitations to assist users in their selection. To date, there has been no systematic overview of elemental proxies and their application in the analysis of marine sediment records.

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“…A more prominent Northern Hemisphere warming started at 17 ka BP and culminated around 13.4 ka BP (Shakun et al, 2012) (Fig. 5), and during this interval the GrIS margin started to retreat across the shelf along most of the Greenland coast (Evans et al, 2002;Kuijpers et al, 2003;Ó Cofaigh et al, 2004;Carlson et al, 2008a;Möller et al, 2010;Larsen et al, 2010;Ó Cofaigh et al, 2013;Jennings et al, 2013). It must be stressed, however, that the ice margin at large did not react in unison to the steadily rising Northern Hemisphere temperature during this period, and neither is this expected for an ice sheet that at the start of deglaciation stretched from 59°N to 84°N across strong climatic gradients.…”

Section: Last Glacial Maximum Ice Extent and Timing Of Initial Retreatmentioning

confidence: 99%

The Greenland Ice Sheet during the last glacial cycle: Current ice loss and contribution to sea-level rise from a palaeoclimatic perspective

Vasskog

Langebroek

Andrews

et al. 2015

Earth-Science Reviews

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Late Quaternary sedimentary processes and ocean circulation changes at the Southeast Greenland margin

Cited by 81 publications

References 47 publications

Environmental changes off North Iceland during the deglaciation and the Holocene: foraminifera, diatoms and stable isotopes

Environmental changes off North Iceland during the deglaciation and the Holocene: foraminifera, diatoms and stable isotopes

Twenty Years of XRF Core Scanning Marine Sediments: What Do Geochemical Proxies Tell Us?

The Greenland Ice Sheet during the last glacial cycle: Current ice loss and contribution to sea-level rise from a palaeoclimatic perspective

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