Coupled response of the late glacial climatic shifts of northwest Europe reflected in Greenland ice cores: Evidence from the northern North Sea

Haflidason, Haflidi; Sejrup, Hans Petter; Kristensen, Dorthe Klitgaard; Johnsen, S. J.

doi:10.1130/0091-7613(1995)023<1059:crotlg>2.3.co;2

Cited by 149 publications

(98 citation statements)

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“…This suggests that the temperature change north of Iceland was only minor compared to the abrupt temperature drop recorded in the eastern North Atlantic at the beginning of the Younger Dryas by e.g. 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.…”

Section: Comparison and Discussionsupporting

confidence: 56%

“…7. Several studies from the northern North Atlantic have previously shown higher reservoir age values for the Lateglacial than observed at present (e.g. Austin et al, 1994;Bard et al, 1994;Haflidason et al, 1995 andBondevik et al, 2001). Waelbroeck et al (2001) have presented data showing that the reservoir age was not constant during the Lateglacial, amounting to 930±250 yr during the Younger Dryas, but as much as 1880±750 yr at the end of the Heinrich 1 event (14500 cal yr BP).…”

Section: Chronologymentioning

confidence: 74%

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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: 56%

Section: Chronologymentioning

confidence: 74%

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 sediment core from the Norwegian Sea also reveals climate changes in phase with air temperature changes over Greenland (Fronval et al 1995). A high-resolution record of planktonic fauna from the Norwegian Channel covering the past 16 ka shows that timing and rate of change fit in detail the isotope record of the GRIP core, suggesting that the Greenland ice core data reflect northwest European climate in great detail (Haflidason et al 1995). And, finally, high-resolution pollen stratigraphy from southern Finland demonstrates many similarities with the Greenland d…”

mentioning

confidence: 91%

Thickness evolution of the Scandinavian Ice Sheet during the Late Weichselian in Nordfjord, western Norway: evidence from ice-flow modeling

Winguth¹,

Mickelson²,

Larsen³

et al. 2008

Boreas

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Results from experiments with a two-dimensional ice-flow model, applied along a west-east transect in western Norway, provide new constraints on the thickness evolution of the Scandinavian Ice Sheet throughout the Late Weichselian glaciation and deglaciation. Investigations took place along an E-W flowline of the former ice sheet at c. 62 N, from the modern glacier Jostedalsbreen, through the Nordfjord, and across the continental shelf. A paleoclimate record from Kråkenes, which is located directly at the flowline, provides temperature and precipitation information for the time between 13 800 and 9200 cal. yr BP.LGM climate conditions for the study area are estimated from various GCM studies. The GISP2 d 18O record has been tuned to the local data in order to provide a continuous temperature record as input for time-transgressive model runs. The results of all experiments suggest that the ice did not cover the highest mountain peaks in this area, and that nunataks persisted throughout the Late Weichselian glaciation. These findings are in contrast to results from many previous model studies and other ice-sheet reconstructions, but agree well with minimum thickness estimates from cosmogenic dating and with vertical ice limits inferred from lower block field boundaries and trimlines.

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“…La droite reliant les intensités des rapports RI (tj) vs RI (t 2 ) est appelée fadia. L'intersection de lafadia avec la droite de pente 1 définit le paramètre (Lehman et al, 1991) et 5.1/5.2 (Sejrup et al, 1989) (Haflidason et al, 1995) 47 Figure 2.8: Correction de la dose équivalente en appliquant la méthode fadia sur l'échantillon TY14 (nombre de grains est égal à 32). (a) Rj (tl ~ 3 h) en fonction de Rj (t2 ~ 7 j).…”

Section: Note Au Lecteurunclassified

“…Les sédiments mis en place depuis la dernière déglaciation ont fait l'objet de plusieurs publications. Leur cadre chronologique est bien établi par de nombreuses dates 14 C effectuées sur des tests de foraminifères (Sejrup et al, 1994;Haflidason et al, 1995). Cependant, la chronologie des dépôts antérieurs aux derniers 15 mille ans demeure relative.…”

Section: Perte Du Signal Avec Le Temps (Anomalous Fading)unclassified

Application des méthodes de datation par luminescence optique à l'environnement océanique de l'Atlantique Nord.

Anasse¹

2002

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Coupled response of the late glacial climatic shifts of northwest Europe reflected in Greenland ice cores: Evidence from the northern North Sea

Cited by 149 publications

References 0 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

Thickness evolution of the Scandinavian Ice Sheet during the Late Weichselian in Nordfjord, western Norway: evidence from ice-flow modeling

Application des méthodes de datation par luminescence optique à l'environnement océanique de l'Atlantique Nord.

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