Recent benthic foraminifera of a transect from the North Pole to the Yermak Plateau, eastern central Arctic Ocean

Bergsten, Helene

doi:10.1016/0025-3227(94)90184-8

Cited by 56 publications

(27 citation statements)

References 27 publications

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“…After that time, M. edulis remained absent until the present time; however; its disappearance could be related to the freshening of Surface Water (Berge at al., 2006) and sea-ice forcing as opposed to the extinction of AW in Storfjorden over the late Holocene .…”

Section: Glaciomarine Unit III (Late Holocene;mentioning

confidence: 99%

“…An oceanic front arising at the contact of different bodies of water is an excellent area for research of contemporary and past environmental changes. Intensification of AW flow and associated climate warming result in decreased sea-ice cover in the Svalbard fjords during winter (Berge et al, 2006) and an increased sediment accumulation rate (Zajączkowski et al, 2004;Szczuciński et al, 2009) and influence the pelage-benthic carbon cycling (Zajączkowski et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

et al. 2015

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Abstract. Multiproxy analyses (including benthic and planktonic foraminifera, δ 18 O and δ 13 C records, grain-size distribution, ice-rafted debris, XRF geochemistry and magnetic susceptibility) were performed on a 14 C-dated marine sediment core from Storfjordrenna, located off of southern Svalbard. The sediments in the core cover the termination of Bølling-Allerød, the Younger Dryas and the Holocene and reflect general changes in the oceanography/climate of the European Arctic after the last glaciation. Grounded ice of the last Svalbard-Barents Sea Ice Sheet retreated from the coring site ca. 13 950 cal yr BP. During the transition from the subglacial to glaciomarine setting, Arctic Waters dominated the hydrography in Storfjordrenna. However, the waters were not uniformly cold and experienced several warmer spells. A progressive warming and marked change in the nature of the hydrology occurred during the early Holocene. Relatively warm and saline Atlantic Water began to dominate the hydrography starting from approximately 9600 cal yr BP. Although the climate in eastern Svalbard was milder at that time than at present (smaller glaciers), two periods of slight cooling were observed in 9000-8000 and 6000-5500 cal yr BP. A change in the Storfjordrenna oceanography occurred at the beginning of the late Holocene (i.e. 3600 cal yr BP) synchronously with glacier growth on land and enhanced bottom current velocities. Although cooling was observed in the Surface Water, Atlantic Water remained present in the deeper portion of the water column of Storfjordrenna.

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Section: Glaciomarine Unit III (Late Holocene;mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

et al. 2015

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“…The genus Nodellum has been widely reported from deep Arctic waters, including the North Pole (Bergsten 1994) and HMMV (Soltwedel et al 2005), and is also common in our samples. However, this taxon presents a number of problems, notably the fact that it encompasses a series of morphotypes that grade into each other.…”

Section: Introductionmentioning

confidence: 86%

“…Scott and Vilks (1991) included surface sediment samples collected during the LOREX expedition across the Lomonosov Ridge in their study of unstained foraminifera. Bergsten (1994) studied live (rose-Bengal stained) and dead foraminifera in box core samples collected along a transect from the Yermak Plateau to the North Pole. Wollenburg and Mackensen (1998a) analysed the distribution of stained foraminifera in a rather more extensive series of samples, most of them collected, using a multiple corer, from the Nansen, Amundsen and Makarov Basins, and the intervening Gakkel and Lmonosov Ridges.…”

Section: North Polementioning

confidence: 99%

“…Gooday et al (2008b) also established the genus Conicotheca for a tiny organicwalled species that has some features in common with Nodellum and Resigella. These three genera are particularly important in some hadal settings (Sabbatini et al 2002;Todo et al 2005;Gooday et al 2008b), as well as in the Arctic (Bergsten 1994;Schewe 2001). The present paper is based on material from two sites in the Arctic Ocean, one bathyal (Håkon Mosby Mud Volcano; HMMV) and the other abyssal (North Pole).…”

Section: Introductionmentioning

confidence: 98%

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The organic-walled genera Resigella and Conicotheca (Protista, Foraminifera) at two Arctic deep-sea sites (North Pole and Barents Sea), including the description of a new species of Resigella

2009

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Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response

Depuydt

Mojtahid

Barras

et al. 2022

J Quaternary Science

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The interaction between ocean circulation and ice‐sheet dynamics plays a key role in the Quaternary climate. Compared with the surface and deep regions of the Atlantic Meridional Overturning Circulation (AMOC), the study of intermediate depths during key time periods, such as Heinrich Stadials (HSs), remains poorly documented, especially for the northeast Atlantic. Here we use benthic foraminiferal assemblage data to trace palaeoenvironmental changes from ~32 to 14 ka cal bp at ~1000 m depth in the Bay of Biscay. Our results highlight the high sensitivity of foraminifera, with species‐specific responses, to continental (European Ice Sheet dynamics) and marine (AMOC) forcing factors during the last three HSs. In general, HSs were characterised by the concomitant presence of meso‐oligotrophic and anoxia indicator species and the low abundance of high‐energy indicator species. This confirms an overall sluggish intermediate circulation during the three HSs in the northeast Atlantic. HS1 is distinctive for its abundance of high‐organic flux indicator species during its early phase. This is consistent with the fact that HS1 was by far the most important period of ice‐sheet retreat and meltwater release into the ocean over the studied time interval. Finally, foraminifera depict the mid‐HS2 reventilation event due to regional glacier instabilities.

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Recent benthic foraminifera of a transect from the North Pole to the Yermak Plateau, eastern central Arctic Ocean

Cited by 56 publications

References 27 publications

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

Late Weichselian and Holocene palaeoceanography of Storfjordrenna, southern Svalbard

The organic-walled genera Resigella and Conicotheca (Protista, Foraminifera) at two Arctic deep-sea sites (North Pole and Barents Sea), including the description of a new species of Resigella

Intermediate ocean circulation and cryosphere dynamics in the northeast Atlantic during Heinrich Stadials: benthic foraminiferal assemblage response

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