Self-regulation of ice flow varies across the ablation area in South-West Greenland

R. S. W. Van de Wal; C. J. P. P. Smeets; W. Boot; M. Stoffelen; R. Van Kampen; Samuel Huckerby Doyle; F. Wilhelms; Michiel R. van den Broeke; C. H. Reijmer; J. Oerlemans; Alun Hubbard

doi:10.5194/tc-9-603-2015

Self-regulation of ice flow varies across the ablation area in South-West Greenland

R. S. W. Van de Wal, C. J. P. P. Smeets, W. Boot, M. Stoffelen, R. Van Kampen, Samuel Huckerby Doyle, F. Wilhelms, Michiel R. van den Broeke, C. H. Reijmer, J. Oerlemans, Alun Hubbard

Adran Daearyddiaeth a Gwyddorau Daear

Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

78 Dyfyniadau (Scopus)

237 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring.

Iaith wreiddiol	Saesneg
Tudalennau (o-i)	603-611
Nifer y tudalennau	9
Cyfnodolyn	Cryosphere
Cyfrol	9
Rhif cyhoeddi	2
Dynodwyr Gwrthrych Digidol (DOIs)	https://doi.org/10.5194/tc-9-603-2015
Statws	Cyhoeddwyd - 01 Ebr 2015

NDC y CU

Mae’r allbwn hwn yn cyfrannu at y Nod(au) Datblygu Cynaliadwy canlynol

Mynediad at Ddogfen

10.5194/tc-9-603-2015

Self-regulation of ice flow varies across the ablation area in south-west GreenlandFersiwn derfynol wedi’i chyhoeddi, 2.59 MB
Supplemental DataData, 4.89 MBTrwydded: CC BY

Cysylltiad parhaol

Dolen barhaus

Ffeiliau eraill a chysylltiadau

Dolen i’r cyhoeddiad yn Scopus

3 Wedi Gorffen

Investigating Meltwater Flow Beneath the Greenland Ice Sheet using a Multi-tracer Approach
Hubbard, A. (Prif Ymchwilydd)
Natural Environment Research Council
01 Mai 2011 → 30 Ebr 2015
Prosiect: Ymchwil a ariannwyd yn allanol
A Holistic Model of Outlet Calving, Dynamic Acceloration and Drawdown for the Greenland Ice Sheet
Hubbard, A. (Prif Ymchwilydd)
Natural Environment Research Council
01 Meh 2009 → 31 Mai 2011
Prosiect: Ymchwil a ariannwyd yn allanol
Dynamic Response of the Greenland Ice Sheet to Climate Forcing using a geophysical, Remote sensing and Numerical Modelling Framework
Hubbard, A. (Prif Ymchwilydd)
Natural Environment Research Council
01 Maw 2009 → 31 Ion 2013
Prosiect: Ymchwil a ariannwyd yn allanol

Dyfynnu hyn

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title = "Self-regulation of ice flow varies across the ablation area in South-West Greenland",

abstract = "The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring.",

author = "{Van de Wal}, {R. S. W.} and Smeets, {C. J. P. P.} and W. Boot and M. Stoffelen and {Van Kampen}, R. and Doyle, {Samuel Huckerby} and F. Wilhelms and {van den Broeke}, {Michiel R.} and Reijmer, {C. H.} and J. Oerlemans and Alun Hubbard",

note = "Publisher Copyright: {\textcopyright} Author(s) 2015.",

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day = "1",

doi = "10.5194/tc-9-603-2015",

language = "English",

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T1 - Self-regulation of ice flow varies across the ablation area in South-West Greenland

AU - Van de Wal, R. S. W.

AU - Smeets, C. J. P. P.

AU - Boot, W.

AU - Stoffelen, M.

AU - Van Kampen, R.

AU - Doyle, Samuel Huckerby

AU - Wilhelms, F.

AU - van den Broeke, Michiel R.

AU - Reijmer, C. H.

AU - Oerlemans, J.

AU - Hubbard, Alun

PY - 2015/4/1

Y1 - 2015/4/1

N2 - The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring.

AB - The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring.

UR - http://www.scopus.com/inward/record.url?scp=84926650209&partnerID=8YFLogxK

U2 - 10.5194/tc-9-603-2015

DO - 10.5194/tc-9-603-2015

M3 - Article

SN - 1994-0416

VL - 9

SP - 603

EP - 611

JO - Cryosphere

JF - Cryosphere

IS - 2

ER -

Self-regulation of ice flow varies across the ablation area in South-West Greenland

Crynodeb

NDC y CU

Mynediad at Ddogfen

Cysylltiad parhaol

Ffeiliau eraill a chysylltiadau

Ôl bys

Prosiectau

Investigating Meltwater Flow Beneath the Greenland Ice Sheet using a Multi-tracer Approach

A Holistic Model of Outlet Calving, Dynamic Acceloration and Drawdown for the Greenland Ice Sheet

Dynamic Response of the Greenland Ice Sheet to Climate Forcing using a geophysical, Remote sensing and Numerical Modelling Framework

Dyfynnu hyn