Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean
Humboldt Gletscher is a 100‐km wide, slow‐moving glacier in north Greenland which holds a 19‐cm global sea level equivalent. Humboldt has been the fourth largest contributor to sea level rise since 1972 but the cause of its mass loss has not been elucidated. Multi‐beam echo sounding data collected i...
Published in: | Geophysical Research Letters |
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AGU (American Geophysical Union)
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/52251/ https://oceanrep.geomar.de/id/eprint/52251/1/2020GL091342.pdf https://doi.org/10.1029/2020GL091342 |
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ftoceanrep:oai:oceanrep.geomar.de:52251 2024-02-11T10:04:00+01:00 Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean Rignot, Eric An, Lu Chauche, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Josh K. Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas 2021-03-28 text https://oceanrep.geomar.de/id/eprint/52251/ https://oceanrep.geomar.de/id/eprint/52251/1/2020GL091342.pdf https://doi.org/10.1029/2020GL091342 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/52251/1/2020GL091342.pdf Rignot, E., An, L., Chauche, N., Morlighem, M., Jeong, S., Wood, M., Mouginot, J., Willis, J. K., Klaucke, I. , Weinrebe, W. and Muenchow, A. (2021) Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean. Open Access Geophysical Research Letter, 48 (6). e2020GL091342. DOI 10.1029/2020GL091342 <https://doi.org/10.1029/2020GL091342>. doi:10.1029/2020GL091342 cc_by_nc_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1029/2020GL091342 2024-01-15T00:23:13Z Humboldt Gletscher is a 100‐km wide, slow‐moving glacier in north Greenland which holds a 19‐cm global sea level equivalent. Humboldt has been the fourth largest contributor to sea level rise since 1972 but the cause of its mass loss has not been elucidated. Multi‐beam echo sounding data collected in 2019 indicate a seabed 200 m deeper than previously known. Conductivity temperature depth data reveal the presence of warm water of Atlantic origin at 0°C at the glacier front and a warming of the ocean waters by 0.9 ± 0.1°C since 1962. Using an ocean model, we reconstruct grounded ice undercutting by the ocean, combine it with calculated retreat caused by ice thinning to floatation, and are able to fully explain the observed retreat. Two thirds of the retreat are caused by undercutting of grounded ice, which is a physical process not included in most ice sheet models. Article in Journal/Newspaper glacier Greenland Humboldt gletscher Ice Sheet North Greenland OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland Humboldt Gletscher ENVELOPE(-62.998,-62.998,79.500,79.500) Geophysical Research Letters 48 6 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Humboldt Gletscher is a 100‐km wide, slow‐moving glacier in north Greenland which holds a 19‐cm global sea level equivalent. Humboldt has been the fourth largest contributor to sea level rise since 1972 but the cause of its mass loss has not been elucidated. Multi‐beam echo sounding data collected in 2019 indicate a seabed 200 m deeper than previously known. Conductivity temperature depth data reveal the presence of warm water of Atlantic origin at 0°C at the glacier front and a warming of the ocean waters by 0.9 ± 0.1°C since 1962. Using an ocean model, we reconstruct grounded ice undercutting by the ocean, combine it with calculated retreat caused by ice thinning to floatation, and are able to fully explain the observed retreat. Two thirds of the retreat are caused by undercutting of grounded ice, which is a physical process not included in most ice sheet models. |
format |
Article in Journal/Newspaper |
author |
Rignot, Eric An, Lu Chauche, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Josh K. Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas |
spellingShingle |
Rignot, Eric An, Lu Chauche, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Josh K. Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean |
author_facet |
Rignot, Eric An, Lu Chauche, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Josh K. Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas |
author_sort |
Rignot, Eric |
title |
Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean |
title_short |
Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean |
title_full |
Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean |
title_fullStr |
Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean |
title_full_unstemmed |
Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean |
title_sort |
retreat of humboldt gletscher, north greenland, driven by undercutting from a warmer ocean |
publisher |
AGU (American Geophysical Union) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/52251/ https://oceanrep.geomar.de/id/eprint/52251/1/2020GL091342.pdf https://doi.org/10.1029/2020GL091342 |
long_lat |
ENVELOPE(-62.998,-62.998,79.500,79.500) |
geographic |
Greenland Humboldt Gletscher |
geographic_facet |
Greenland Humboldt Gletscher |
genre |
glacier Greenland Humboldt gletscher Ice Sheet North Greenland |
genre_facet |
glacier Greenland Humboldt gletscher Ice Sheet North Greenland |
op_relation |
https://oceanrep.geomar.de/id/eprint/52251/1/2020GL091342.pdf Rignot, E., An, L., Chauche, N., Morlighem, M., Jeong, S., Wood, M., Mouginot, J., Willis, J. K., Klaucke, I. , Weinrebe, W. and Muenchow, A. (2021) Retreat of Humboldt Gletscher, North Greenland, Driven by Undercutting From a Warmer Ocean. Open Access Geophysical Research Letter, 48 (6). e2020GL091342. DOI 10.1029/2020GL091342 <https://doi.org/10.1029/2020GL091342>. doi:10.1029/2020GL091342 |
op_rights |
cc_by_nc_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020GL091342 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
6 |
_version_ |
1790600423465287680 |