Holocene fluctuations of Bregne ice cap, Scoresby Sund, east Greenland: a proxy for climate along the Greenland Ice Sheet margin

Levy, Laura B.; Kelly, M. A.; Lowell, Thomas V.; Hall, Brenda L.; Hempel, L. A.; Honsaker, William M.; Lusas, Amanda R.; Howley, Jennifer A.; Axford, Yarrow

doi:10.1016/j.quascirev.2013.06.024

Cited by 55 publications

(36 citation statements)

References 47 publications

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“…This advance could have glaciated the summit of the Central Threshold, where the two sampling sites were located. Consistent with this, important glacial advances around 3.5-3.2 and 2.6-2.4 ka have been detected in the Alps (Haas et al, 1998;Deline and Orombelli, 2005;Holzhauser et al, 2005;Joerin et al, 2006;Ivy-Ochs et al, 2009a), Scandinavia (Nesje, 2009;Bakke et al, 2010), Iceland (Larsen et al, 2012;Geirsdóttir et al, 2013), the Altai Mountains (Chernykh et al, 2013), West Greenland (Levy et al, 2013), West Canada (Tiedeman-Peyto Advance) Menounos et al, 2009;Maurer et al, 2012) and the Sierra Nevada of California (Bowerman and Clark, 2011). This is typically considered a period of minimum glaciation (Holzhauser et al, 2005) indicates that a glacier was present at the northern face of the Mulhacén Peak between 2.8-2.7 ka BP (Oliva and Gómez Ortiz, 2012).…”

Section: C) Cosmogenic Dating Of the Marboré Cirque Glacial Landformssupporting

confidence: 69%

Holocene and ‘Little Ice Age’ glacial activity in the Marboré Cirque, Monte Perdido Massif, Central Spanish Pyrenees

et al. 2014

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Section: C) Cosmogenic Dating Of the Marboré Cirque Glacial Landformssupporting

confidence: 69%

Holocene and ‘Little Ice Age’ glacial activity in the Marboré Cirque, Monte Perdido Massif, Central Spanish Pyrenees

et al. 2014

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“…ka BP (Levy et al . ). In southeast Greenland, two records from Kulusuk Lake and Ymer Lake show that local ice caps melted away for most of the Holocene ~7.8 to 4.1 cal.…”

Section: Discussionmentioning

confidence: 97%

Local ice caps in Finderup Land, North Greenland, survived the Holocene Thermal Maximum

Larsen

Levy

Strunk

et al. 2019

Boreas

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Local glaciers and ice caps (GICs) comprise only ~5.4% of the total ice volume, but account for ~14–20% of the current ice loss in Greenland. The glacial history of GICs is not well constrained, however, and little is known about how they reacted to Holocene climate changes. Specifically, in North Greenland, there is limited knowledge about past GIC fluctuations and whether they survived the Holocene Thermal Maximum (HTM, ~8 to 5 ka). In this study, we use proglacial lake records to constrain the ice‐marginal fluctuations of three local ice caps in North Greenland including Flade Isblink, the largest ice cap in Greenland. Additionally, we have radiocarbon dated reworked marine molluscs in Little Ice Age (LIA) moraines adjacent to the Flade Isblink, which reveal when the ice cap was smaller than present. We found that outlet glaciers from Flade Isblink retreated inland of their present extent from ~9.4 to 0.2 cal. ka BP. The proglacial lake records, however, demonstrate that the lakes continued to receive glacial meltwater throughout the entire Holocene. This implies that GICs in Finderup Land survived the HTM. Our results are consistent with other observations from North Greenland but differ from locations in southern Greenland where all records show that the local ice caps at low and intermediate elevations disappeared completely during the HTM. We explain the north–south gradient in glacier response as a result of sensitivity to increased temperature and precipitation. While the increased temperatures during the HTM led to a complete melting of GICs in southern Greenland, GICs remained in North Greenland probably because the melting was counterbalanced by increased precipitation due to a reduction in Arctic sea‐ice extent and/or increased poleward moisture transport.

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“…When the equilibrium line altitude (ELA) is located above the plateau edge, plateau icefields become highly sensitive to changes in atmospheric boundary conditions, because a small increase or decrease in the ELA will lead to a large increase in the size of the ablation or accumulation area, respectively (Furbish and Andrews, ; Oerlemans, ; Barr and Lovell, ). This, combined with shorter response times than for larger ice masses, has resulted in a complex response to climate fluctuations throughout the Holocene (Nesje et al ., ; Levy et al ., ; Margreth et al ., ). During the last glacial these factors probably resulted in plateau icefield expansion ahead of ice sheet advance in regions such as upland Britain, Norway, Arctic Canada and Greenland (Rea and Evans, ).…”

Section: Introductionmentioning

confidence: 99%

Topographic controls on plateau icefield recession: insights from the Younger Dryas Monadhliath Icefield, Scotland

Boston

Lukas

2019

J Quaternary Science

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Plateau icefields are a common form of mountain ice mass, frequently found in mid‐latitude to high‐arctic regions and increasingly recognized in the Quaternary record. Their top‐heavy hypsometry makes them highly sensitive to changes in climate when the equilibriaum line altitude (ELA) lies above the plateau edge, allowing ice to expand significantly as regional ELAs decrease, and causing rapid recession as climate warms. With respect to future climate warming, it is important to understand the controls on plateau icefield response to climate change in order to better predict recession rates, with implications for water resources and sea‐level rise. Improving knowledge of the controls on glacier recession may also enable further palaeoclimatic information to be extracted from the Quaternary glacial record. We use the distribution of moraines to examine topographic controls on Younger Dryas icefield recession in Scotland. We find that overall valley morphology influences the style of recession, through microclimatic and geometric controls, with bed gradient affecting moraine spacing. Ice mass reconfiguration may occur as recession progresses because ice divide migration could alter the expected response based on hypsometric distribution. These results add to a growing body of research examining controls on glacier recession and offer a step towards unravelling non‐linear ice mass behaviour. Copyright © 2019 John Wiley & Sons, Ltd.

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Holocene fluctuations of Bregne ice cap, Scoresby Sund, east Greenland: a proxy for climate along the Greenland Ice Sheet margin

Cited by 55 publications

References 47 publications

Holocene and ‘Little Ice Age’ glacial activity in the Marboré Cirque, Monte Perdido Massif, Central Spanish Pyrenees

Holocene and ‘Little Ice Age’ glacial activity in the Marboré Cirque, Monte Perdido Massif, Central Spanish Pyrenees

Local ice caps in Finderup Land, North Greenland, survived the Holocene Thermal Maximum

Topographic controls on plateau icefield recession: insights from the Younger Dryas Monadhliath Icefield, Scotland

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