Atlantic water inflow to Labrador Sea and its interaction with ice sheet dynamics during the Holocene

Weiser, Jens; Titschack, Jürgen; Kienast, Markus; McCave, I. N.; Lochte, Annalena Antonia; Saini, Jeetendra; Stein, Rüdiger; Hebbeln, Dierk

doi:10.1016/j.quascirev.2021.106833

Cited by 17 publications

(35 citation statements)

References 116 publications

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“…ka BP (Fig. 10G), which is in line with the Neoglacial slowdown documented off the SW Greenland margin (Weiser et al 2021) and in the North Atlantic (McCave & Andrews, 2019b), our results suggest that increased input and advection of fine-grained sediments in the Cape Norton Shaw Inlet during this period most likely had a strong overprint on the SS record in core 01PC.…”

Section: Discussionsupporting

confidence: 82%

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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

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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: Discussionsupporting

confidence: 82%

“…Blake 1993). This marine optimum is characterized by higher sea surface temperature and increasing influence of the WGC in northern Baffin Bay (Ledu et al 2010;Caron et al 2019;McCave & Andrews, 2019b;Hansen et al 2020;Weiser et al 2021; Fig. 10C).…”

Section: Discussionmentioning

confidence: 99%

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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“…Core GeoB19905-1. -The age model of core GeoB19905-1 (Weiser et al 2021) suggests continuous sedimentation from 11.5 to 7.6 ka BP and since 5.9 ka BP (Fig. 2).…”

Section: Resultsmentioning

confidence: 96%

“…The chronostratigraphy of core GeoB19905-1 (Fig. 2) is based on 12 AMS 14 C dates, previously published by Weiser et al (2021) (see data sets available at https://doi. org/10.1016/j.quascirev.2021.106833).…”

Section: Chronostratigraphymentioning

confidence: 99%

Holocene variability in sea‐ice conditions in the eastern Baffin Bay‐Labrador Sea – A north–south biomarker transect study

Saini

Stein

Fahl

et al. 2022

Boreas

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Reconstructions of sea-surface conditions during the Holocene were achieved using three sediment cores from northeastern Baffin Bay (GeoB19948-3 and GeoB19927-3) and the Labrador Sea (GeoB19905-1) along a northsouth transect based on sea-ice IP 25 and open-water phytoplankton biomarkers (brassicasterol, dinosterol and HBI III). In Baffin Bay, sea-surface conditions in the Early Holocene were characterized by extended (early) spring sea ice cover (SIC) prior to 7.6 ka BP. The conditions in the NE Labrador Sea, however, remained predominantly ice-free in spring/autumn due to the enhanced influx of Atlantic Water (West Greenland Current, WGC) from 11.5 until ~9.1 ka BP, succeeded by a period of continued (spring-autumn) ice-free conditions between 9.1 and 7.6 ka BP corresponding to the onset of Holocene Thermal Maximum (HTM)-like conditions. A transition towards reoccurring ice-edge and significantly reduced SIC conditions in Baffin Bay is evident in the Middle Holocene (~7.6-3 ka BP) probably caused by the variations in the WGC influence associated with the ice melting and can be characterized as HTM-like conditions. These HTM-like conditions are predominantly recorded in the NE Labrador Sea area shown by (springautumn) ice-free conditions from 5.9-3 ka BP. In the Late Holocene (last ~3 ka), our combined proxy records from eastern Baffin Bay indicate low in-situ ice algae production; however, enhanced multi-year (drifted) sea ice in this area was possibly attributed to the increased influx of Polar Water mass influx and may correlate with the Neoglacial cooling. The conditions in the NE Labrador Sea during the last 3 ka, however, continued to remain (spring-autumn) ice-free. Our data from the Baffin Bay-Labrador Sea transect suggest a dominant influence of meltwater influx on seaice formation throughout the Holocene, in contrast to sea-ice records from the Fram Strait area, which seem to follow predominantly the summer insolation trend.

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“…The exact timing and extent of the Neoglacial is uncertain, but estimates range between 6 and 2 cal ka BP (Jennings et al, 2002; Moossen et al, 2015; Weidick et al, 2012; Weiser et al, 2021). Shells dated between 4.4 and 3.8, 3.5–3.0, and 2.4 cal ka BP are contemporaneous with this time interval as well as specific cold events within it.…”

Section: Discussionmentioning

confidence: 99%

Historical biogeographic range shifts and the influence of climate change on ocean quahogs (Arctica islandica) on the Mid-Atlantic Bight

et al. 2022

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The Holocene, starting approximately 11.7 cal ka, is characterized by distinct periods of warming and cooling. Despite these known climate events, few temperature proxy data exist in the northwestern Atlantic Ocean. One potential record of past water temperatures is preserved in the marine fossil record. Shell growth of ocean quahogs ( Arctica islandica), a long-lived bivalve, can provide records of past environmental conditions. Arctica islandica habitat includes the Mid-Atlantic Bight (MAB), an area rapidly warming as a consequence of climate change. The Cold Pool, a bottom-trapped water mass on the outer continental shelf within the MAB, rarely rises above 15°C. Ocean quahogs inhabiting the MAB are confined to the Cold Pool as a consequence of an upper thermal limit for the species of ~15–16°C. Recently, dead A. islandica shells were discovered outside of the species’ present-day range, suggesting that the Cold Pool once extended further inshore than now observed. Shells collected off the Delmarva Peninsula were radiocarbon-dated to identify the timing of habitation and biogeographic range shifts. Dead shell ages range from 4400 to 60 cal BP, including ages representing four major Holocene cold events. Nearly absent from this record are shells from the intermittent warm periods. Radiocarbon ages indicate that ocean quahogs, contemporaneous with the present MAB populations, were living inshore of their present-day distribution during the past 200 years. This overlap suggests the initiation of a recent biogeographic range shift that occurred as a result of a regression of the Cold Pool following the Little Ice Age.

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Atlantic water inflow to Labrador Sea and its interaction with ice sheet dynamics during the Holocene

Cited by 17 publications

References 116 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)

Holocene variability in sea‐ice conditions in the eastern Baffin Bay‐Labrador Sea – A north–south biomarker transect study

Historical biogeographic range shifts and the influence of climate change on ocean quahogs (Arctica islandica) on the Mid-Atlantic Bight

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