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...
Main Authors: | , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2021
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/3wq4d0v5 |
id |
ftcdlib:oai:escholarship.org:ark:/13030/qt3wq4d0v5 |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org:ark:/13030/qt3wq4d0v5 2023-10-01T03:56:08+02:00 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 e2020gl091342 2021-03-28 application/pdf https://escholarship.org/uc/item/3wq4d0v5 unknown eScholarship, University of California qt3wq4d0v5 https://escholarship.org/uc/item/3wq4d0v5 public Geophysical Research Letters, vol 48, iss 6 Climate Action bathymetry glaciology Greenland mass balance physical ocean sea level Meteorology & Atmospheric Sciences article 2021 ftcdlib 2023-09-04T18:04:12Z 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 200m 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 University of California: eScholarship Greenland Humboldt Gletscher ENVELOPE(-62.998,-62.998,79.500,79.500) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action bathymetry glaciology Greenland mass balance physical ocean sea level Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action bathymetry glaciology Greenland mass balance physical ocean sea level Meteorology & Atmospheric Sciences 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 |
topic_facet |
Climate Action bathymetry glaciology Greenland mass balance physical ocean sea level Meteorology & Atmospheric Sciences |
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 200m 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 |
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 |
eScholarship, University of California |
publishDate |
2021 |
url |
https://escholarship.org/uc/item/3wq4d0v5 |
op_coverage |
e2020gl091342 |
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_source |
Geophysical Research Letters, vol 48, iss 6 |
op_relation |
qt3wq4d0v5 https://escholarship.org/uc/item/3wq4d0v5 |
op_rights |
public |
_version_ |
1778525309754146816 |