Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed

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Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed. / Bougamont, M.; Christoffersen, Poul; Hubbard, Alun; Fitzpatrick, Andrew Alexander William; Doyle, Samuel Huckerby; Carter, Sasha P.

In: Nature Communications, Vol. 5, 5052, 29.09.2014.

Research output: Contribution to journalArticle

Harvard

Bougamont, M, Christoffersen, P, Hubbard, A, Fitzpatrick, AAW, Doyle, SH & Carter, SP 2014, 'Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed' Nature Communications, vol. 5, 5052. https://doi.org/10.1038/ncomms6052

APA

Bougamont, M., Christoffersen, P., Hubbard, A., Fitzpatrick, A. A. W., Doyle, S. H., & Carter, S. P. (2014). Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed. Nature Communications, 5, [5052]. https://doi.org/10.1038/ncomms6052

Vancouver

Bougamont M, Christoffersen P, Hubbard A, Fitzpatrick AAW, Doyle SH, Carter SP. Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed. Nature Communications. 2014 Sep 29;5. 5052. https://doi.org/10.1038/ncomms6052

Author

Bougamont, M. ; Christoffersen, Poul ; Hubbard, Alun ; Fitzpatrick, Andrew Alexander William ; Doyle, Samuel Huckerby ; Carter, Sasha P. / Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed. In: Nature Communications. 2014 ; Vol. 5.

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@article{9f46526c75d14bbc903ab7a7586d8545,
title = "Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed",
abstract = "The dynamic response of the Greenland Ice Sheet (GrIS) depends on feedbacks between surface meltwater delivery to the subglacial environment and ice flow. Recent work has highlighted an important role of hydrological processes in regulating the ice flow, but models have so far overlooked the mechanical effect of soft basal sediment. Here we use a three-dimensional model to investigate hydrological controls on a GrIS soft-bedded region. Our results demonstrate that weakening and strengthening of subglacial sediment, associated with the seasonal delivery of surface meltwater to the bed, modulates ice flow consistent with observations. We propose that sedimentary control on ice flow is a viable alternative to existing models of evolving hydrological systems, and find a strong link between the annual flow stability, and the frequency of high meltwater discharge events. Consequently, the observed GrIS resilience to enhanced melt could be compromised if runoff variability increases further with future climate warming.",
author = "M. Bougamont and Poul Christoffersen and Alun Hubbard and Fitzpatrick, {Andrew Alexander William} and Doyle, {Samuel Huckerby} and Carter, {Sasha P.}",
note = "Bougamont, M., Christoffersen, P., Hubbard, A., Fitzpatrick, A. A. W., Doyle, S. H., Carter, S. P. (2014). Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed. Nature Communications, 5, [5052]",
year = "2014",
month = "9",
day = "29",
doi = "10.1038/ncomms6052",
language = "English",
volume = "5",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Springer Nature",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed

AU - Bougamont, M.

AU - Christoffersen, Poul

AU - Hubbard, Alun

AU - Fitzpatrick, Andrew Alexander William

AU - Doyle, Samuel Huckerby

AU - Carter, Sasha P.

N1 - Bougamont, M., Christoffersen, P., Hubbard, A., Fitzpatrick, A. A. W., Doyle, S. H., Carter, S. P. (2014). Sensitive response of the Greenland Ice Sheet to surface melt drainage over a soft bed. Nature Communications, 5, [5052]

PY - 2014/9/29

Y1 - 2014/9/29

N2 - The dynamic response of the Greenland Ice Sheet (GrIS) depends on feedbacks between surface meltwater delivery to the subglacial environment and ice flow. Recent work has highlighted an important role of hydrological processes in regulating the ice flow, but models have so far overlooked the mechanical effect of soft basal sediment. Here we use a three-dimensional model to investigate hydrological controls on a GrIS soft-bedded region. Our results demonstrate that weakening and strengthening of subglacial sediment, associated with the seasonal delivery of surface meltwater to the bed, modulates ice flow consistent with observations. We propose that sedimentary control on ice flow is a viable alternative to existing models of evolving hydrological systems, and find a strong link between the annual flow stability, and the frequency of high meltwater discharge events. Consequently, the observed GrIS resilience to enhanced melt could be compromised if runoff variability increases further with future climate warming.

AB - The dynamic response of the Greenland Ice Sheet (GrIS) depends on feedbacks between surface meltwater delivery to the subglacial environment and ice flow. Recent work has highlighted an important role of hydrological processes in regulating the ice flow, but models have so far overlooked the mechanical effect of soft basal sediment. Here we use a three-dimensional model to investigate hydrological controls on a GrIS soft-bedded region. Our results demonstrate that weakening and strengthening of subglacial sediment, associated with the seasonal delivery of surface meltwater to the bed, modulates ice flow consistent with observations. We propose that sedimentary control on ice flow is a viable alternative to existing models of evolving hydrological systems, and find a strong link between the annual flow stability, and the frequency of high meltwater discharge events. Consequently, the observed GrIS resilience to enhanced melt could be compromised if runoff variability increases further with future climate warming.

UR - http://hdl.handle.net/2160/27721

U2 - 10.1038/ncomms6052

DO - 10.1038/ncomms6052

M3 - Article

VL - 5

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 5052

ER -

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