Accelerating ice flow at the onset of the Northeast Greenland Ice Stream

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Accelerating ice flow at the onset of the Northeast Greenland Ice Stream. / Grinsted, Aslak; Hvidberg, Christine S.; Lilien, David A.; Rathmann, Nicholas M.; Karlsson, Nanna B.; Gerber, Tamara; Kjaer, Helle Astrid; Vallelonga, Paul; Dahl-Jensen, Dorthe.

In: Nature Communications, Vol. 13, No. 1, 5589, 23.09.2022.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Grinsted, A, Hvidberg, CS, Lilien, DA, Rathmann, NM, Karlsson, NB, Gerber, T, Kjaer, HA, Vallelonga, P & Dahl-Jensen, D 2022, 'Accelerating ice flow at the onset of the Northeast Greenland Ice Stream', Nature Communications, vol. 13, no. 1, 5589. https://doi.org/10.1038/s41467-022-32999-2

APA

Grinsted, A., Hvidberg, C. S., Lilien, D. A., Rathmann, N. M., Karlsson, N. B., Gerber, T., Kjaer, H. A., Vallelonga, P., & Dahl-Jensen, D. (2022). Accelerating ice flow at the onset of the Northeast Greenland Ice Stream. Nature Communications, 13(1), [5589]. https://doi.org/10.1038/s41467-022-32999-2

Vancouver

Grinsted A, Hvidberg CS, Lilien DA, Rathmann NM, Karlsson NB, Gerber T et al. Accelerating ice flow at the onset of the Northeast Greenland Ice Stream. Nature Communications. 2022 Sep 23;13(1). 5589. https://doi.org/10.1038/s41467-022-32999-2

Author

Grinsted, Aslak ; Hvidberg, Christine S. ; Lilien, David A. ; Rathmann, Nicholas M. ; Karlsson, Nanna B. ; Gerber, Tamara ; Kjaer, Helle Astrid ; Vallelonga, Paul ; Dahl-Jensen, Dorthe. / Accelerating ice flow at the onset of the Northeast Greenland Ice Stream. In: Nature Communications. 2022 ; Vol. 13, No. 1.

Bibtex

@article{8799d5d24d5d46859081a5662c641b81,
title = "Accelerating ice flow at the onset of the Northeast Greenland Ice Stream",
abstract = "A new study finds that the North East Greenland ice stream is not as stable as previously thought and that this will affect its future evolution.Mass loss near the ice-sheet margin is evident from remote sensing as frontal retreat and increases in ice velocities. Velocities in the ice sheet interior are orders of magnitude smaller, making it challenging to detect velocity change. Here, we analyze a 35-year record of remotely sensed velocities, and a 6-year record of repeated GPS observations, at the East Greenland Ice-core Project (EastGRIP), located in the middle of the Northeast-Greenland Ice Stream (NEGIS). We find that the shear margins of NEGIS are accelerating, indicating a widening of the ice stream. We demonstrate that the widening of the ice stream is unlikely to be a response to recent changes at the outlets of NEGIS. Modelling indicates that the observed spatial fingerprint of acceleration is more consistent with a softening of the shear margin, e.g. due to evolving fabric or temperature, than a response to external forcing at the surface or bed.",
author = "Aslak Grinsted and Hvidberg, {Christine S.} and Lilien, {David A.} and Rathmann, {Nicholas M.} and Karlsson, {Nanna B.} and Tamara Gerber and Kjaer, {Helle Astrid} and Paul Vallelonga and Dorthe Dahl-Jensen",
year = "2022",
month = sep,
day = "23",
doi = "10.1038/s41467-022-32999-2",
language = "English",
volume = "13",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "nature publishing group",
number = "1",

}

RIS

TY - JOUR

T1 - Accelerating ice flow at the onset of the Northeast Greenland Ice Stream

AU - Grinsted, Aslak

AU - Hvidberg, Christine S.

AU - Lilien, David A.

AU - Rathmann, Nicholas M.

AU - Karlsson, Nanna B.

AU - Gerber, Tamara

AU - Kjaer, Helle Astrid

AU - Vallelonga, Paul

AU - Dahl-Jensen, Dorthe

PY - 2022/9/23

Y1 - 2022/9/23

N2 - A new study finds that the North East Greenland ice stream is not as stable as previously thought and that this will affect its future evolution.Mass loss near the ice-sheet margin is evident from remote sensing as frontal retreat and increases in ice velocities. Velocities in the ice sheet interior are orders of magnitude smaller, making it challenging to detect velocity change. Here, we analyze a 35-year record of remotely sensed velocities, and a 6-year record of repeated GPS observations, at the East Greenland Ice-core Project (EastGRIP), located in the middle of the Northeast-Greenland Ice Stream (NEGIS). We find that the shear margins of NEGIS are accelerating, indicating a widening of the ice stream. We demonstrate that the widening of the ice stream is unlikely to be a response to recent changes at the outlets of NEGIS. Modelling indicates that the observed spatial fingerprint of acceleration is more consistent with a softening of the shear margin, e.g. due to evolving fabric or temperature, than a response to external forcing at the surface or bed.

AB - A new study finds that the North East Greenland ice stream is not as stable as previously thought and that this will affect its future evolution.Mass loss near the ice-sheet margin is evident from remote sensing as frontal retreat and increases in ice velocities. Velocities in the ice sheet interior are orders of magnitude smaller, making it challenging to detect velocity change. Here, we analyze a 35-year record of remotely sensed velocities, and a 6-year record of repeated GPS observations, at the East Greenland Ice-core Project (EastGRIP), located in the middle of the Northeast-Greenland Ice Stream (NEGIS). We find that the shear margins of NEGIS are accelerating, indicating a widening of the ice stream. We demonstrate that the widening of the ice stream is unlikely to be a response to recent changes at the outlets of NEGIS. Modelling indicates that the observed spatial fingerprint of acceleration is more consistent with a softening of the shear margin, e.g. due to evolving fabric or temperature, than a response to external forcing at the surface or bed.

U2 - 10.1038/s41467-022-32999-2

DO - 10.1038/s41467-022-32999-2

M3 - Journal article

C2 - 36151072

VL - 13

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 5589

ER -

ID: 321268342