Radiocarbon deglaciation chronology of the Thunder Bay, Ontario area and implications for ice sheet retreat patterns

Lowell, Thomas V.; Fisher, Timothy G.; Hajdas, Irka; Glover, Katherine; Loope, Henry M.; Henry, Thomas R.

doi:10.1016/j.quascirev.2009.02.025

Cited by 55 publications

(67 citation statements)

References 44 publications

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“…Its outlet chronology has been reconstructed using: (1) the location of the changing LIS margin (Dyke, 2004;Lowell et al, 2009); (2) the dating of beaches that define the lake's outline (e.g. Teller et al, 2000;Lepper et al, 2013); (3) data-calibrated numerical ice sheet modelling (Tarasov and Peltier, 2006); (4) the palaeo-topography of the basin inferred from isostatic rebound (e.g.…”

Section: Proglacial Hydrology Of Ice Sheets and Proglacial Lakesmentioning

confidence: 99%

“…Teller et al, 2000;Lepper et al, 2013); (3) data-calibrated numerical ice sheet modelling (Tarasov and Peltier, 2006); (4) the palaeo-topography of the basin inferred from isostatic rebound (e.g. Leverington et al, 2000;2002;Rayburn and Teller, 2007); and (5) the dating of meltwater events in the different outlet channels, and in lakes and oceans beyond the channel mouths (Section 2.6), including the use of deep sea oxygen isotope records and distinctive sediment discharge to identify meltwater pulses (Fisher, 2007;Hillaire-Marcel et al, 2008;Lowell et al, 2009;Lewis et al, 2012;Fisher and Lowell, 2012;Teller, 2013).…”

Section: Proglacial Hydrology Of Ice Sheets and Proglacial Lakesmentioning

confidence: 99%

“…It has been argued that overflow from GLA may have triggered the YD stadial, but there is uncertainty as to whether it overflowed to the east, to the northwest, or did not overflow at all (Lowell et al, 2009;Fisher and Lowell, 2012;Lowell et al, 2013;Teller, 2013). Opinions differ about precise timing and routing of GLA overflow during the YD, because different approaches often yield different interpretations (e.g.…”

Section: Proglacial Hydrology Of Ice Sheets and Proglacial Lakesmentioning

confidence: 99%

See 2 more Smart Citations

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

Stokes

Tarasov

Blomdin

et al. 2015

Quaternary Science Reviews

Self Cite

151

104

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Section: Proglacial Hydrology Of Ice Sheets and Proglacial Lakesmentioning

confidence: 99%

Section: Proglacial Hydrology Of Ice Sheets and Proglacial Lakesmentioning

confidence: 99%

Section: Proglacial Hydrology Of Ice Sheets and Proglacial Lakesmentioning

confidence: 99%

See 1 more Smart Citation

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

Stokes

Tarasov

Blomdin

et al. 2015

Quaternary Science Reviews

Self Cite

151

104

View full text Add to dashboard Cite

“…The area between the Vermilion moraine to the south, and the Eagle-Finlayson and Brule Creek moraines to the north was deglaciated before 10400 14 C B.P. (Lowell et al 2009). Following the retreat of the Rainy lobe, the St. Louis sublobe of the Red River-Koochiching lobe expanded to the southeast.…”

Section: Discussionmentioning

confidence: 99%

Alluvial stratigraphy and geoarchaeology in the Big Fork River Valley, Minnesota: human response to Late Holocene environmental change

Hill

Rapp

Jing

2011

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The Late Quaternary geomorphology and stratigraphy of the Big Fork River valley, within the Rainy River basin of northern Minnesota, reveals evidence of prehistoric human interaction with late Holocene riverine environments. By 11 000 14C BP, deglaciation made the region inhabitable by human groups using Clovis artefacts. Human habitation would also have been possible during the Moorhead low-water stage of glacial Lake Agassiz, starting at 10 500 14C BP. Near its confluence with the Rainy River, the valley floor of the Big Fork valley consists of a floodplain complex and two terraces. The multi-component stratified Hannaford site is situated within the active floodplain. Overbank deposits contain artefacts in primary context, whereas artefacts within the point bar deposits are in secondary archaeological context; these deposits are associated with changing alluvial settings as the river moved eastward. Aggradation of the valley fill beneath the lowest surface (T0, floodplain complex) began by 3000 years ago and is associated with human activities focused on seasonal fishing and the use of riparian resources from 1300 to 650 14C BP.

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“…It was suggested that an abrupt change from a southward drainage (to the Mississippi) to a westward discharge through the St. Lawrence River valley at *12.9 ka established a freshwater lid on the northern North Atlantic that reduced or shut down vertical convection and significantly weakened the AMOC. Several authors, however, have claimed a lack of field evidence for large-volume freshwater fluxes in the proposed through-flow regions west of the St. Lawrence River (e.g., [49,86]). Combining results from modeling and field studies, an alternative theory involves a northward routing of freshwater discharge through the Mackenzie valley, entering the Arctic Ocean at 135°W in the Beaufort Sea [57,82,83].…”

Section: Last Deglaciationmentioning

confidence: 99%

The role of Arctic Ocean freshwater during the past 200 ky

Spielhagen

Bauch

2015

Arktos

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As part of the hydrologic cycle, the freshwater system plays a pivotal role for the Arctic Ocean. It maintains the strong stratification in the upper waters and fosters the formation of sea ice on the circum-Arctic shelves from where the ice is being exported toward Fram Strait and into the Nordic Seas. Recent projections of climate change under the greenhouse effect predict severe changes for the hydrologic cycle in the Arctic. This manuscript reviews the current knowledge of past changes in freshwater fluxes to and from the Arctic Ocean and their possible impact on ocean circulation and climate outside the Arctic during the past 200,000 years. It becomes evident that abrupt and large-volume discharges into the Arctic Ocean during times of major climate transitions were capable of disturbing the global ocean circulation and triggering further climate change, e.g., at the onset of the Younger Dryas cold event. During sea-level rise in the Holocene, a connection between the increasing areas available for sea ice formation, the position of the ice margin in the ice export area (the Fram Strait) and the deepwater convection in the Greenland Sea is suggested. Further work is needed to investigate the effects of other catastrophic freshwater discharges from previously ice-dammed lakes in northern Eurasia during the Weichselian and Saalian glaciations. Events like the 8.2 ka and the Younger Dryas, which were associated with flooding and routing of glacial meltwaters and had a significant effect on climate, could serve as a template to better validate the impact of similar occurrences in the past. To date, the actual influence of the earlier events on ocean circulation and climate remains elusive.

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Radiocarbon deglaciation chronology of the Thunder Bay, Ontario area and implications for ice sheet retreat patterns

Cited by 55 publications

References 44 publications

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

On the reconstruction of palaeo-ice sheets: Recent advances and future challenges

Alluvial stratigraphy and geoarchaeology in the Big Fork River Valley, Minnesota: human response to Late Holocene environmental change

The role of Arctic Ocean freshwater during the past 200 ky

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