Changes in Greenland’s peripheral glaciers linked to the North Atlantic Oscillation

A. A. Bjørk*, S. Aagaard, A. Lütt, S. A. Khan, J. Box, K. K. Kjeldsen, N. K. Larsen, N. J. Korsgaard, J. Cappelen, W. T. Colgan, H. Machguth, C. S. Andresen, Y. Peings, K. H. Kjær

*Corresponding author for this work

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Abstract

Glaciers and ice caps peripheral to the main Greenland Ice Sheet contribute markedly to sea-level rise1,2,3. Their changes and variability, however, have been difficult to quantify on multi-decadal timescales due to an absence of long-term data4. Here, using historical aerial surveys, expedition photographs, spy satellite imagery and new remote-sensing products, we map glacier length fluctuations of approximately 350 peripheral glaciers and ice caps in East and West Greenland since 1890. Peripheral glaciers are found to have recently undergone a widespread and significant retreat at rates of 12.2 m per year and 16.6 m per year in East and West Greenland, respectively; these changes are exceeded in severity only by the early twentieth century post-Little-Ice-Age retreat. Regional changes in ice volume, as reflected by glacier length, are further shown to be related to changes in precipitation associated with the North Atlantic Oscillation (NAO), with a distinct east–west asymmetry; positive phases of the NAO increase accumulation, and thereby glacier growth, in the eastern periphery, whereas opposite effects are observed in the western periphery. Thus, with projected trends towards positive NAO in the future5,6, eastern peripheral glaciers may remain relatively stable, while western peripheral glaciers will continue to diminish.
Original languageEnglish
JournalNature Climate Change
Volume8
Pages (from-to)48–52
ISSN1758-678X
DOIs
Publication statusPublished - 2018

Cite this

Bjørk, A. A. ; Aagaard, S. ; Lütt, A. ; Khan, S. A. ; Box, J. ; Kjeldsen, K. K. ; Larsen, N. K. ; Korsgaard, N. J. ; Cappelen, J. ; Colgan, W. T. ; Machguth, H. ; Andresen, C. S. ; Peings, Y. ; Kjær, K. H. / Changes in Greenland’s peripheral glaciers linked to the North Atlantic Oscillation. In: Nature Climate Change. 2018 ; Vol. 8. pp. 48–52.
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title = "Changes in Greenland’s peripheral glaciers linked to the North Atlantic Oscillation",
abstract = "Glaciers and ice caps peripheral to the main Greenland Ice Sheet contribute markedly to sea-level rise1,2,3. Their changes and variability, however, have been difficult to quantify on multi-decadal timescales due to an absence of long-term data4. Here, using historical aerial surveys, expedition photographs, spy satellite imagery and new remote-sensing products, we map glacier length fluctuations of approximately 350 peripheral glaciers and ice caps in East and West Greenland since 1890. Peripheral glaciers are found to have recently undergone a widespread and significant retreat at rates of 12.2 m per year and 16.6 m per year in East and West Greenland, respectively; these changes are exceeded in severity only by the early twentieth century post-Little-Ice-Age retreat. Regional changes in ice volume, as reflected by glacier length, are further shown to be related to changes in precipitation associated with the North Atlantic Oscillation (NAO), with a distinct east–west asymmetry; positive phases of the NAO increase accumulation, and thereby glacier growth, in the eastern periphery, whereas opposite effects are observed in the western periphery. Thus, with projected trends towards positive NAO in the future5,6, eastern peripheral glaciers may remain relatively stable, while western peripheral glaciers will continue to diminish.",
author = "Bj{\o}rk, {A. A.} and S. Aagaard and A. L{\"u}tt and Khan, {S. A.} and J. Box and Kjeldsen, {K. K.} and Larsen, {N. K.} and Korsgaard, {N. J.} and J. Cappelen and Colgan, {W. T.} and H. Machguth and Andresen, {C. S.} and Y. Peings and Kj{\ae}r, {K. H.}",
year = "2018",
doi = "10.1038/s41558-017-0029-1",
language = "English",
volume = "8",
pages = "48–52",
journal = "Nature Climate Change",
issn = "1758-678X",
publisher = "Nature Publishing Group",

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Bjørk, AA, Aagaard, S, Lütt, A, Khan, SA, Box, J, Kjeldsen, KK, Larsen, NK, Korsgaard, NJ, Cappelen, J, Colgan, WT, Machguth, H, Andresen, CS, Peings, Y & Kjær, KH 2018, 'Changes in Greenland’s peripheral glaciers linked to the North Atlantic Oscillation', Nature Climate Change, vol. 8, pp. 48–52. https://doi.org/10.1038/s41558-017-0029-1

Changes in Greenland’s peripheral glaciers linked to the North Atlantic Oscillation. / Bjørk, A. A.; Aagaard, S.; Lütt, A.; Khan, S. A. ; Box, J.; Kjeldsen, K. K.; Larsen, N. K.; Korsgaard, N. J.; Cappelen, J.; Colgan, W. T.; Machguth, H.; Andresen, C. S.; Peings, Y.; Kjær, K. H.

In: Nature Climate Change, Vol. 8, 2018, p. 48–52.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Changes in Greenland’s peripheral glaciers linked to the North Atlantic Oscillation

AU - Bjørk, A. A.

AU - Aagaard, S.

AU - Lütt, A.

AU - Khan, S. A.

AU - Box, J.

AU - Kjeldsen, K. K.

AU - Larsen, N. K.

AU - Korsgaard, N. J.

AU - Cappelen, J.

AU - Colgan, W. T.

AU - Machguth, H.

AU - Andresen, C. S.

AU - Peings, Y.

AU - Kjær, K. H.

PY - 2018

Y1 - 2018

N2 - Glaciers and ice caps peripheral to the main Greenland Ice Sheet contribute markedly to sea-level rise1,2,3. Their changes and variability, however, have been difficult to quantify on multi-decadal timescales due to an absence of long-term data4. Here, using historical aerial surveys, expedition photographs, spy satellite imagery and new remote-sensing products, we map glacier length fluctuations of approximately 350 peripheral glaciers and ice caps in East and West Greenland since 1890. Peripheral glaciers are found to have recently undergone a widespread and significant retreat at rates of 12.2 m per year and 16.6 m per year in East and West Greenland, respectively; these changes are exceeded in severity only by the early twentieth century post-Little-Ice-Age retreat. Regional changes in ice volume, as reflected by glacier length, are further shown to be related to changes in precipitation associated with the North Atlantic Oscillation (NAO), with a distinct east–west asymmetry; positive phases of the NAO increase accumulation, and thereby glacier growth, in the eastern periphery, whereas opposite effects are observed in the western periphery. Thus, with projected trends towards positive NAO in the future5,6, eastern peripheral glaciers may remain relatively stable, while western peripheral glaciers will continue to diminish.

AB - Glaciers and ice caps peripheral to the main Greenland Ice Sheet contribute markedly to sea-level rise1,2,3. Their changes and variability, however, have been difficult to quantify on multi-decadal timescales due to an absence of long-term data4. Here, using historical aerial surveys, expedition photographs, spy satellite imagery and new remote-sensing products, we map glacier length fluctuations of approximately 350 peripheral glaciers and ice caps in East and West Greenland since 1890. Peripheral glaciers are found to have recently undergone a widespread and significant retreat at rates of 12.2 m per year and 16.6 m per year in East and West Greenland, respectively; these changes are exceeded in severity only by the early twentieth century post-Little-Ice-Age retreat. Regional changes in ice volume, as reflected by glacier length, are further shown to be related to changes in precipitation associated with the North Atlantic Oscillation (NAO), with a distinct east–west asymmetry; positive phases of the NAO increase accumulation, and thereby glacier growth, in the eastern periphery, whereas opposite effects are observed in the western periphery. Thus, with projected trends towards positive NAO in the future5,6, eastern peripheral glaciers may remain relatively stable, while western peripheral glaciers will continue to diminish.

U2 - 10.1038/s41558-017-0029-1

DO - 10.1038/s41558-017-0029-1

M3 - Journal article

VL - 8

SP - 48

EP - 52

JO - Nature Climate Change

JF - Nature Climate Change

SN - 1758-678X

ER -