Palaeoceanographic evolution of the <scp>SW</scp> Svalbard shelf over the last 14 000 years

Telesiński, Maciej Mateusz; Przytarska, Joanna; Sternal, Beata; Forwick, Matthias; Szczuciński, Witold; Łącka, Magdalena; Zajączkowski, Marek

doi:10.1111/bor.12282

Cited by 12 publications

(20 citation statements)

References 78 publications

(225 reference statements)

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“…BP (Figure 5) may not result from the glacier advances and the blockage of the strait. The IRD values from Storfjorden and the Svalbard shelf west of Hornsund remained low in these periods (Nielsen and Rasmussen, 2018; Telesiński et al, 2018) and lake records have not revealed glacier advances in other regions of Svalbard (Allaart et al, 2021; de Wet et al, 2018; Røthe et al, 2015, 2018; Svendsen and Mangerud, 1997). In Hornsund, the radiocarbon dates of peat melted on the surface of Hansbreen suggest significant reduction in the glacier area around 7.9 and 5.9 ka cal.…”

Section: Discussionmentioning

confidence: 91%

Holocene ice-free strait followed by dynamic Neoglacial fluctuations: Hornsund, Svalbard

2022

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The recession of the Hornbreen-Hambergbreen glaciers (Hornsund, Svalbard) will lead to the formation of a strait between the Greenland and Barents Seas within a few decades. We provide evidence for the earlier existence of this strait, in the Early–Middle Holocene and presumably since 1.3 ka cal. BP until glacier advance 0.7 ± 0.3 ka or earlier. Radiocarbon dating of mollusc shells from the ground moraines in the Hornbreen forefield indicate the existence of the marine environment at the contemporary glacierized head of Hornsund since 10.9 ka cal. BP or earlier due to glacier retreat. The gap in the radiocarbon dates between 3.9 and 1.3 ka cal. BP and the published results of 10Be exposure dating on Treskelen suggest the strait’s closure after glacier advance in the Neoglacial. Subsequent re-opening occurred around 1.3 ka cal. BP, but according to 10Be dates from Treskelen, the strait has again been closed since ca. 0.7 ± 0.3 ka or earlier. The oldest known surge of Hornbreen occurred around 1900. Analysis of Landsat satellite images, morphometric indicators characterizing the glacier frontal zones and previous studies indicate one surge of Hambergbreen (1957–1968) and five re-advances of Hornbreen in the 20th century (after 1936, between 1958 and 1962, in 1986–1990, 1998–1999, 2011). While the warmer Holocene intervals might be a benchmark for the effects of future climate change, glacier dynamics in post-Little Ice Age climate warming seems to be an analogue of glacier retreats and re-advances in the earlier periods of the Holocene.

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Section: Discussionmentioning

confidence: 91%

Holocene ice-free strait followed by dynamic Neoglacial fluctuations: Hornsund, Svalbard

2022

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“…4). The YD is reflected in multiple records from the northeastern North Atlantic Ocean 7,8,19 . For instance, in Kveithola Trough located south of Storfjordrenna, the sea-ice proxy P III IP 25 (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Numerous marine sedimentary records attest that the northern hemisphere was subjected to rapid cooling over circa 1000 years during the YD 7,8 . As earlier investigations focused mainly on overviews of Late Glacial and Holocene paleoceanography of the Nordic Seas, the YD interval in marine records was presented in low temporal resolution (several hundreds of years).…”

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confidence: 99%

Multiproxy paleoceanographic study from the western Barents Sea reveals dramatic Younger Dryas onset followed by oscillatory warming trend

Łącka

Michalska

Pawłowska

et al. 2020

Sci Rep

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The Younger Dryas (YD) is recognized as a cool period that began and ended abruptly during a time of general warming at the end of the last glacial. New multi-proxy data from a sediment gravity core from Storfjordrenna (western Barents Sea, 253 m water depth) reveals that the onset of the YD occurred as a single short-lived dramatic environment deterioration, whereas the subsequent warming was oscillatory. The water masses in the western Barents Sea were likely strongly stratified at the onset of the YD, possibly due to runoff of meltwater combined with perennial sea-ice cover, the latter may last up to several decades without any brake-up. Consequently, anoxic conditions prevailed at the bottom of Storfjordrenna, leading to a sharp reduction of benthic biota and the appearance of vivianite microconcretions which formation is favoured by reducing conditions. While the anoxic conditions in Storfjordrenna were transient, the unfavorable conditions for benthic foraminifera lasted for c. 1300 years. We suggest that the Pre-Boreal Oscillation, just after the onset of the Holocene, may have been a continuation of the oscillatory warming trend during the YD.

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“…interpreted as a direct proxy of AW inflow, raised slowly and gradually (Figure 5). In comparison with the Greenland Sea record, in the northeastern Nordic Seas, the sSST (site M23258, Risebrobakken et al, 2011), as well as the abundance of AW indicators (site JM07-015, Telesiński et al, 2018), increased rapidly (Figure 5) indicating a maximum in AW advection already 10-11 ka BP (Husum and Hald, 2012;Risebrobakken et al, 2011). Shallow water (<50 m) temperatures around Svalbard were higher than at present (Mangerud and Svendsen, 2017) and AW reached the northern Svalbard shelf (Ślubowska-Woldengen et al, 2007), the northern Barents Sea (Berben et al, 2017) and as far as the western Fram Strait.…”

Section: Palaeoceanographic Reconstructionmentioning

confidence: 99%

“…Rasmussen and Thomsen, 2008, 2010) and the NAC flow along the Scandinavian, Barents Sea and Svalbard continental margins (e.g. Groot et al, 2014; Rasmussen et al, 2007, 2012, 2014; Ślubowska-Woldengen et al, 2007; Telesiński et al, 2018; Łącka et al, 2015, 2019) and/or through the Fram Strait into the Arctic Ocean (e.g. Aagaard-Sørensen et al, 2014; Spielhagen et al, 2011; Werner et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The significance of Atlantic Water routing in the Nordic Seas: The Holocene perspective

et al. 2022

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The Nordic Seas are a key region for global ocean circulation, crucial in water mass exchange between the North Atlantic and the Arctic oceans, and deepwater formation. The advection of Atlantic Water (AW) to the Nordic Seas is decisive for the oceanography and climate of the region and beyond. Here, we present a set of sedimentary records, including two new cores from the western Nordic Seas to reconstruct the history of AW routing in the Nordic Seas over the Holocene. Our results show that the early Holocene (11.7–8 ka BP) thermal maximum, caused by an ‘overshoot’ of overturning circulation and high insolation, was limited to the eastern Nordic Seas, while the western part remained cold due to the meltwater blocking the spreading of AW. After 8 ka BP, the retreat of the freshwater lid allowed AW to reach the central Greenland Sea, where deep convection developed. After 5 ka BP, the increase in sea-ice export from the Arctic strengthened deep convection, which intensified the westward AW flow. A disruption of convectional activity around 2.7 ka BP, triggered by a minimum in solar activity, caused cooling and expansion of sea ice in the Nordic Seas and might have contributed to a global climatic deterioration. The overturning circulation in the Nordic Seas did not recover to its previous state until the present. We demonstrate that the rate of AW advection into the Nordic Seas alone is not enough to understand the oceanographic evolution of this area and its influence on regional or even global ocean and climate changes. The shifts in AW routing within the Nordic Seas and the rate of deep convection are also important.

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Palaeoceanographic evolution of the SW Svalbard shelf over the last 14 000 years

Cited by 12 publications

References 78 publications

Holocene ice-free strait followed by dynamic Neoglacial fluctuations: Hornsund, Svalbard

Holocene ice-free strait followed by dynamic Neoglacial fluctuations: Hornsund, Svalbard

Multiproxy paleoceanographic study from the western Barents Sea reveals dramatic Younger Dryas onset followed by oscillatory warming trend

The significance of Atlantic Water routing in the Nordic Seas: The Holocene perspective

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