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Rapid dynamic activation of a marine-based Arctic ice cap

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Rapid dynamic activation of a marine-based Arctic ice cap. / McMillan, Malcolm; Shepherd, Andrew; Gourmelen, Noel et al.
In: Geophysical Research Letters, Vol. 41, No. 24, 27.01.2015, p. 8902-8909.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

McMillan, M, Shepherd, A, Gourmelen, N, Dehecq, A, Leeson, A, Ridout, A, Flament, T, Hogg, A, Gilbert, L, Benham, T, Van Den Broeke, M, Dowdeswell, JA, Fettweis, X, Noël, B & Strozzi, T 2015, 'Rapid dynamic activation of a marine-based Arctic ice cap', Geophysical Research Letters, vol. 41, no. 24, pp. 8902-8909. https://doi.org/10.1002/2014GL062255

APA

McMillan, M., Shepherd, A., Gourmelen, N., Dehecq, A., Leeson, A., Ridout, A., Flament, T., Hogg, A., Gilbert, L., Benham, T., Van Den Broeke, M., Dowdeswell, J. A., Fettweis, X., Noël, B., & Strozzi, T. (2015). Rapid dynamic activation of a marine-based Arctic ice cap. Geophysical Research Letters, 41(24), 8902-8909. https://doi.org/10.1002/2014GL062255

Vancouver

McMillan M, Shepherd A, Gourmelen N, Dehecq A, Leeson A, Ridout A et al. Rapid dynamic activation of a marine-based Arctic ice cap. Geophysical Research Letters. 2015 Jan 27;41(24):8902-8909. Epub 2014 Dec 2. doi: 10.1002/2014GL062255

Author

McMillan, Malcolm ; Shepherd, Andrew ; Gourmelen, Noel et al. / Rapid dynamic activation of a marine-based Arctic ice cap. In: Geophysical Research Letters. 2015 ; Vol. 41, No. 24. pp. 8902-8909.

Bibtex

@article{1ece6f29b2a548dc926d65cb04c410c7,
title = "Rapid dynamic activation of a marine-based Arctic ice cap",
abstract = "We use satellite observations to document rapid acceleration and ice loss from a formerly slow-flowing, marine-based sector of Austfonna, the largest ice cap in the Eurasian Arctic. During the past two decades, the sector ice discharge has increased 45-fold, the velocity regime has switched from predominantly slow (~ 101 m/yr) to fast (~ 103 m/yr) flow, and rates of ice thinning have exceeded 25 m/yr. At the time of widespread dynamic activation, parts of the terminus may have been near floatation. Subsequently, the imbalance has propagated 50 km inland to within 8 km of the ice cap summit. Our observations demonstrate the ability of slow-flowing ice to mobilize and quickly transmit the dynamic imbalance inland; a process that we show has initiated rapid ice loss to the ocean and redistribution of ice mass to locations more susceptible to melt, yet which remains poorly understood. Key Points Recent dynamic activation of a formerly slow-flowing marine Arctic ice capImbalance has spread 50 km inland to within 8 km of the ice cap summitIce discharge has increased 45-fold, and thinning rates have exceeded 25 m/yr",
keywords = "altimetry, Austfonna, dynamic instability, ice cap, InSAR, mass balance",
author = "Malcolm McMillan and Andrew Shepherd and Noel Gourmelen and Amaury Dehecq and Amber Leeson and Andrew Ridout and Thomas Flament and Anna Hogg and Lin Gilbert and Toby Benham and {Van Den Broeke}, Michiel and Dowdeswell, {Julian A.} and Xavier Fettweis and Brice No{\"e}l and Tazio Strozzi",
note = "{\textcopyright} 2016 American Geophysical Union",
year = "2015",
month = jan,
day = "27",
doi = "10.1002/2014GL062255",
language = "English",
volume = "41",
pages = "8902--8909",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "John Wiley & Sons, Ltd",
number = "24",

}

RIS

TY - JOUR

T1 - Rapid dynamic activation of a marine-based Arctic ice cap

AU - McMillan, Malcolm

AU - Shepherd, Andrew

AU - Gourmelen, Noel

AU - Dehecq, Amaury

AU - Leeson, Amber

AU - Ridout, Andrew

AU - Flament, Thomas

AU - Hogg, Anna

AU - Gilbert, Lin

AU - Benham, Toby

AU - Van Den Broeke, Michiel

AU - Dowdeswell, Julian A.

AU - Fettweis, Xavier

AU - Noël, Brice

AU - Strozzi, Tazio

N1 - © 2016 American Geophysical Union

PY - 2015/1/27

Y1 - 2015/1/27

N2 - We use satellite observations to document rapid acceleration and ice loss from a formerly slow-flowing, marine-based sector of Austfonna, the largest ice cap in the Eurasian Arctic. During the past two decades, the sector ice discharge has increased 45-fold, the velocity regime has switched from predominantly slow (~ 101 m/yr) to fast (~ 103 m/yr) flow, and rates of ice thinning have exceeded 25 m/yr. At the time of widespread dynamic activation, parts of the terminus may have been near floatation. Subsequently, the imbalance has propagated 50 km inland to within 8 km of the ice cap summit. Our observations demonstrate the ability of slow-flowing ice to mobilize and quickly transmit the dynamic imbalance inland; a process that we show has initiated rapid ice loss to the ocean and redistribution of ice mass to locations more susceptible to melt, yet which remains poorly understood. Key Points Recent dynamic activation of a formerly slow-flowing marine Arctic ice capImbalance has spread 50 km inland to within 8 km of the ice cap summitIce discharge has increased 45-fold, and thinning rates have exceeded 25 m/yr

AB - We use satellite observations to document rapid acceleration and ice loss from a formerly slow-flowing, marine-based sector of Austfonna, the largest ice cap in the Eurasian Arctic. During the past two decades, the sector ice discharge has increased 45-fold, the velocity regime has switched from predominantly slow (~ 101 m/yr) to fast (~ 103 m/yr) flow, and rates of ice thinning have exceeded 25 m/yr. At the time of widespread dynamic activation, parts of the terminus may have been near floatation. Subsequently, the imbalance has propagated 50 km inland to within 8 km of the ice cap summit. Our observations demonstrate the ability of slow-flowing ice to mobilize and quickly transmit the dynamic imbalance inland; a process that we show has initiated rapid ice loss to the ocean and redistribution of ice mass to locations more susceptible to melt, yet which remains poorly understood. Key Points Recent dynamic activation of a formerly slow-flowing marine Arctic ice capImbalance has spread 50 km inland to within 8 km of the ice cap summitIce discharge has increased 45-fold, and thinning rates have exceeded 25 m/yr

KW - altimetry

KW - Austfonna

KW - dynamic instability

KW - ice cap

KW - InSAR

KW - mass balance

U2 - 10.1002/2014GL062255

DO - 10.1002/2014GL062255

M3 - Journal article

AN - SCOPUS:84921844855

VL - 41

SP - 8902

EP - 8909

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 24

ER -