Coastal glaciers advanced onto Jameson Land, East Greenland during the late glacial–early Holocene Milne Land Stade

Alexanderson, Helena; Håkansson, Lena

doi:10.3402/polar.v33.20313

Cited by 10 publications

(10 citation statements)

References 48 publications

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“…If these age overestimates amount to a few thousand years (as has been found in modern settings of such depositional environments, e.g. Alexanderson and Murray (2012b) and Alexanderson and Håkansson (2014)), it is likely that the upper part of the sediment sequence (unit B in Fig. 8B) was deposited Fig.…”

Section: Chronology As Implied From the Osl Age Datasetmentioning

confidence: 89%

Drumlinised glaciofluvial and glaciolacustrine sediments on the Småland peneplain, South Sweden – new information on the growth and decay history of the Fennoscandian Ice Sheets during MIS 3

Möller

Murray

2015

Quaternary Science Reviews

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Section: Chronology As Implied From the Osl Age Datasetmentioning

confidence: 89%

Drumlinised glaciofluvial and glaciolacustrine sediments on the Småland peneplain, South Sweden – new information on the growth and decay history of the Fennoscandian Ice Sheets during MIS 3

Möller

Murray

2015

Quaternary Science Reviews

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“…Furthermore, some glaciers advanced in Greenland during this interval (Alley et al, 2010). Moraines of the Milne Land Stage (MLS) in East Greenland record a significant readvance of both independent glaciers and the GrIS margin and are broadly constrained to the YD (Funder, 1972(Funder, , 1978Denton et al, 2005;Kelly et al, 2008;Hall et al, 2008b;Alexanderson and Håkansson, 2014). There is also evidence for a glacial readvance in West Greenland during this interval; Jakobshavn Isbrae briefly readvanced to a position on the outer-shelf , and the mid-shelf Fiskebanke moraines further south may have formed during a YD readvance (Weidick et al, 2004;Funder et al, 2011).…”

Section: Timing and Mechanisms Of Fjord Deglaciationmentioning

confidence: 99%

Evidence for the asynchronous retreat of large outlet glaciers in southeast Greenland at the end of the last glaciation

Dyke

Hughes

Murray

et al. 2014

Quaternary Science Reviews

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Be exposure dating Fjord deglaciation a b s t r a c t Recent rapid changes in the marine-terminating sectors of the Greenland Ice Sheet (GrIS) have prompted concerns about the future stability of the ice sheet. Long-term records of ice sheet behaviour provide valuable context to assess the magnitude of current change and may help resolve the mechanisms driving deglaciation. We report 23 new 10 Be exposure ages which constrain the deglacial history of two large fjord systems in southeast (SE) Greenland. We compare our chronologies with existing data from the centre of the sector to examine the timing and style of deglaciation at a regional-scale. Glacial erratic 10 Be exposure ages demonstrate that Kangerdlugssuaq Fjord deglaciated at~11.8 ka at the end of the Younger Dryas (YD e 12.8e11.6 ka). Retreat at Kangerdlugssuaq Fjord coincided with known incursion of the warm Irminger Current (IC) onto the continental shelf; this is inferred to have initiated retreat. Comparison with recently published results from Sermilik Fjord and new 10 Be ages from Bernstorffs Fjord indicates deglaciation occurred~1 ka later in the south of the SE region. Sermilik Fjord (~10.9 ka) and Bernstorffs Fjord (~10.4 ka) deglaciated later; retreat likely occurred in response to dramatic climatic amelioration at the termination of the YD stadial. We suggest that the disparate timing of deglaciation across the SE region may be primarily explained by the varying influence of the warm IC; glaciers in southern SE Greenland were isolated from warm Atlantic waters during the YD by complex shelf bathymetry. In all fjord settings ice retreat was rapid and persistent, consistent with the absence of geomorphological evidence for stillstand or readvance events. Ice retreat was accompanied by rapid thinning and likely continued to well within present-day ice sheet margins. Glacial erratic 10 Be age determinations and geomorphological observations show no evidence for Holocene readvance events prior to the Little Ice Age (LIA).

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“…(), respectively, so we cite the 10 Be ages reported therein. The 10 Be ages from Alexanderson & Håkansson () and 10 additional 10 Be ages from Möller et al . () were recalculated for this study using the CRONUS‐Earth online exposure age calculator (Balco et al .…”

Section: Introductionmentioning

confidence: 99%

A ¹⁰Be chronology of early Holocene local glacier moraines in central West Greenland

OHara

Briner

Kelley

2017

Boreas

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New cosmogenic 10Be exposure ages constrain Greenland Ice Sheet (GrIS) deglaciation and the culmination of a local glacier advance on the southern shore of Nuussuaq (peninsula) in central West Greenland. Mean ages of GrIS deglaciation and local glacier moraine deposition are 10.5±0.1 ka (n = 2) and 10.4±0.2 ka (n = 5), respectively. The similar ages suggest an advance/stillstand of local glaciers soon after the local retreat of the GrIS. The moraines dated in this study may be correlative to the nearby Disko Stade moraines. Moraine chronologies for both GrIS moraines and our local glacier moraines in central West Greenland correspond to detrital carbonate peaks in a Labrador shelf marine sediment core that records Laurentide Ice Sheet (LIS) discharge from Hudson Strait. Large freshwater discharge events into the North Atlantic sub‐polar gyre have been linked to abrupt cooling events in the Northern Hemisphere during the early Holocene. We propose LIS freshwater input to the sub‐polar gyre and associated regional cooling as the main driver for advance/stillstand of both local glaciers and the GrIS in central West Greenland during the early Holocene.

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Coastal glaciers advanced onto Jameson Land, East Greenland during the late glacial–early Holocene Milne Land Stade

Cited by 10 publications

References 48 publications

Drumlinised glaciofluvial and glaciolacustrine sediments on the Småland peneplain, South Sweden – new information on the growth and decay history of the Fennoscandian Ice Sheets during MIS 3

Drumlinised glaciofluvial and glaciolacustrine sediments on the Småland peneplain, South Sweden – new information on the growth and decay history of the Fennoscandian Ice Sheets during MIS 3

Evidence for the asynchronous retreat of large outlet glaciers in southeast Greenland at the end of the last glaciation

A ¹⁰Be chronology of early Holocene local glacier moraines in central West Greenland

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Coastal glaciers advanced onto Jameson Land, East Greenland during the late glacial–early Holocene Milne Land Stade

Cited by 10 publications

References 48 publications

Drumlinised glaciofluvial and glaciolacustrine sediments on the Småland peneplain, South Sweden – new information on the growth and decay history of the Fennoscandian Ice Sheets during MIS 3

Drumlinised glaciofluvial and glaciolacustrine sediments on the Småland peneplain, South Sweden – new information on the growth and decay history of the Fennoscandian Ice Sheets during MIS 3

Evidence for the asynchronous retreat of large outlet glaciers in southeast Greenland at the end of the last glaciation

A 10Be chronology of early Holocene local glacier moraines in central West Greenland

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A ¹⁰Be chronology of early Holocene local glacier moraines in central West Greenland