Late Holocene sea-surface changes in the North Water polynya reveal freshening of northern Baffin Bay in the 21st century

Koerner, Kelsey A.; Limoges, Audrey; Nieuwenhove, Nicolas Van; Richerol, Thomas; Massé, Guillaume; Ribeiro, Sofia

doi:10.1016/j.gloplacha.2021.103642

Cited by 5 publications

(7 citation statements)

References 96 publications

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“…2021; Koerner et al. 2021). Indeed, increases in the northward advection of warm Atlantic‐sourced water via the West Greenland Current (WGC) and atmospheric temperature can contribute to enhanced mass loss from the glaciers and ice caps of northern Baffin Bay and the NW Greenland margin (e.g.…”

Section: Figmentioning

confidence: 93%

“…Deglacial and Holocene sedimentation rates near the Manson Icefield area range from 0.67 to 0.046 cm a −1 (e.g. Rochon & Vernal 1994;Mudie et al 2006;Bailey et al 2013;St-Onge & St-Onge 2014;Cormier et al 2016;Ribeiro et al 2021).…”

Section: Surrounding Geology and Sedimentationmentioning

confidence: 99%

“…2020; Ribeiro et al . 2021; Koerner et al 2021) by adopting a multiproxy approach (physical properties, thin sections, grain size, quantitative mineralogy, pXRF) to provide an improved quantification of the sediment provenance and transport pathways in northwestern Baffin Bay since the last deglaciation, and their connection to regional climate history. This study provides more information about the long‐term development of the NOW, which is the largest and most productive polynya in the northern hemisphere on which local communities depend (e.g.…”

Section: Figmentioning

confidence: 99%

“…The NOW area is highly vulnerable to long-term changes in climate and ocean dynamics (e.g. Tremblay 2002; Mudie et al 2006;Cormier et al 2016;Ribeiro et al 2021;Koerner et al 2021). Indeed, increases in the northward advection of warm Atlantic-sourced water via the West Greenland Current (WGC) and atmospheric temperature can contribute to enhanced mass loss from the glaciers and ice caps of northern Baffin Bay and the NW Greenland margin (e.g.…”

mentioning

confidence: 99%

“…This study provides more information about the long-term development of the NOW, which is the largest and most productive polynya in the northern hemisphere on which local communities depend (e.g. Ribeiro et al 2021).…”

mentioning

confidence: 99%

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Lateglacial and Holocene sedimentary dynamics in northwestern Baffin Bay as recorded in sediment cores from Cape Norton Shaw Inlet (Nunavut, Canada)

Stevenard

Montero‐Serrano

Eynaud

et al. 2021

Boreas

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CAA glaciers could lose ~18% of their volume by the end of the 21st century, thus contributing an increase of 0.35AE0.24 mm a −1 to global sea level rise (Lenaerts et al. 2013;Noël et al. 2018). However, the response of CAA glaciers to modern global warming is not equally distributed spatially, with the highest retreat rates on small ice masses (Thomson et al. 2011;Sharp et al. 2014;White & Copland 2018). Furthermore, the longterm (>50 years) calving rates and sediment fluxes of CAA marine-terminating glaciers are poorly documented (e.g. over the whole Holocene; Solomina et al. 2015) and little is known about the precise mechanisms(atmospheric or ocean) controlling the frontal changes of these glaciers (Cook et al. 2019). Therefore, the longterm glacial sediment dynamics and the role of atmospheric and oceanic forcing on marine-terminating glaciers in the CAA need to be better understood to accurately predict future glacier behaviour and to improve sea level projections (Hodson et al. 2013). Glacier-proximal sedimentary sequences can be used to reconstruct past glacier variations and their responses to climate and oceanographic drivers during the Holocene, against which recent changes can be compared. Canadian and Greenlandian Shield covers Cambrian to Ordovician : limestones, dolostones, shales and evaporites Ellesmere-North Greenland fold belt Neoproterozoıc to Cretaceous : limestones, dolostones with Cenozoıc red beds and Ordovician pyroclastic rocks Foxe Basin, Prince Regent Basin Cambrian to Ordovician : silicoclastic rocks with presence of Cretaceous coal Sverdrup Basin (east), Eurekan Orogen Permian to Cretaceous : predominantly silicoclastic rocks Canadian and Greenlandian shields Paleoproterozoıc : granites, gniess. High metamorphism Ellesmerian Orogen Neoproterozoıc : granites, gneiss and granitoıd rocks

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Section: Figmentioning

confidence: 93%

Section: Surrounding Geology and Sedimentationmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Lateglacial and Holocene sedimentary dynamics in northwestern Baffin Bay as recorded in sediment cores from Cape Norton Shaw Inlet (Nunavut, Canada)

Stevenard

Montero‐Serrano

Eynaud

et al. 2021

Boreas

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Labrador Coastal Current and productivity variations offshore Nain (Nunatsiavut) during the late Holocene

Atkinson,

Normandeau,

Van Nieuwenhove

et al. 2024

Quaternary Science Reviews

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Millennial-scale variations in Arctic sea ice are recorded in sedimentary ancient DNA of the microalga Polarella glacialis

Harðardóttir,

Haile,

Ray

et al. 2024

Commun Earth Environ

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Sea ice is a critical component of the Earth’s Climate System and a unique habitat. Sea-ice changes prior to the satellite era are poorly documented, and proxy methods are needed to constrain its past variability. Here, we demonstrate the potential of sedimentary DNA from Polarella glacialis, a sea-ice microalga, for tracing past sea-ice conditions. We quantified P. glacialis DNA (targeting the nuclear ribosomal ITS1 region) in Arctic marine and fjord surface sediments and a sediment core from northern Baffin Bay spanning 12,000 years. Sea ice and sediment trap samples confirmed that cysts of P. glacialis are common in first-year sea ice and sinking particulate matter following sea-ice melt. Its detection is more efficient with our molecular approach than standard micropaleontological methods. Given that the species inhabits coastal and marine environments in the Arctic and Antarctic, P. glacialis DNA has the potential to become a useful tool for circum-polar sea-ice reconstructions.

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Late Holocene sea-surface changes in the North Water polynya reveal freshening of northern Baffin Bay in the 21st century

Cited by 5 publications

References 96 publications

Lateglacial and Holocene sedimentary dynamics in northwestern Baffin Bay as recorded in sediment cores from Cape Norton Shaw Inlet (Nunavut, Canada)

Lateglacial and Holocene sedimentary dynamics in northwestern Baffin Bay as recorded in sediment cores from Cape Norton Shaw Inlet (Nunavut, Canada)

Labrador Coastal Current and productivity variations offshore Nain (Nunatsiavut) during the late Holocene

Millennial-scale variations in Arctic sea ice are recorded in sedimentary ancient DNA of the microalga Polarella glacialis

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