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...
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ftzenodo:oai:zenodo.org:4250932 2024-09-15T18:07:43+00:00 Retreat of Humboldt Gletscher, North Greenland, driven by undercutting from a warmer ocean Rignot, Eric An, Lu Chauché, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Joshua Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas 2020-11-06 https://doi.org/10.7280/D1D39G unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.7280/D1D39G oai:zenodo.org:4250932 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Glaciology sea level mass balance bathymetry Physical Oceanography info:eu-repo/semantics/other 2020 ftzenodo https://doi.org/10.7280/D1D39G 2024-07-27T03:39:57Z 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 (CTD) 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 is caused by undercutting of grounded ice, which is a physical process not included in most ice sheet models. 1. OMG 2019 Multi-beam echo sounder bathymetry measurement in front of Humboldt Gletscher 2. Ice fronts of Humboldt Gletscher (1948-2019) 3. All CTDs used in the manuscript 4. Ice thickness profile S-N in Figure1 5. Humboldt Gletscher's whole basin and north basin boundary Other/Unknown Material glacier Greenland Humboldt gletscher Ice Sheet North Greenland Zenodo |
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unknown |
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Glaciology sea level mass balance bathymetry Physical Oceanography |
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Glaciology sea level mass balance bathymetry Physical Oceanography Rignot, Eric An, Lu Chauché, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Joshua Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas Retreat of Humboldt Gletscher, North Greenland, driven by undercutting from a warmer ocean |
topic_facet |
Glaciology sea level mass balance bathymetry Physical Oceanography |
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 (CTD) 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 is caused by undercutting of grounded ice, which is a physical process not included in most ice sheet models. 1. OMG 2019 Multi-beam echo sounder bathymetry measurement in front of Humboldt Gletscher 2. Ice fronts of Humboldt Gletscher (1948-2019) 3. All CTDs used in the manuscript 4. Ice thickness profile S-N in Figure1 5. Humboldt Gletscher's whole basin and north basin boundary |
format |
Other/Unknown Material |
author |
Rignot, Eric An, Lu Chauché, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Joshua Klaucke, Ingo Weinrebe, Wilhelm Muenchow, Andreas |
author_facet |
Rignot, Eric An, Lu Chauché, Nolwenn Morlighem, Mathieu Jeong, Seongsu Wood, Michael Mouginot, Jeremie Willis, Joshua 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 |
Zenodo |
publishDate |
2020 |
url |
https://doi.org/10.7280/D1D39G |
genre |
glacier Greenland Humboldt gletscher Ice Sheet North Greenland |
genre_facet |
glacier Greenland Humboldt gletscher Ice Sheet North Greenland |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.7280/D1D39G oai:zenodo.org:4250932 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.7280/D1D39G |
_version_ |
1810445100422004736 |