Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019
International audience Glaciers are currently the largest contributor to sea level rise after ocean thermal expansion, contributing ∼ 30 % to the sea level budget. Global monitoring of these regions remains a challenging task since global estimates rely on a variety of observations and models to ach...
Published in: | The Cryosphere |
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ftccsdartic:oai:HAL:insu-03707765v1 2023-06-11T04:11:52+02:00 Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 Jakob, Livia Gourmelen, Noel Ewart, Martin Plummer, Stephen Institut de physique du globe de Strasbourg (IPGS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS) 2021 https://hal-insu.archives-ouvertes.fr/insu-03707765 https://hal-insu.archives-ouvertes.fr/insu-03707765/document https://hal-insu.archives-ouvertes.fr/insu-03707765/file/tc-15-1845-2021.pdf https://doi.org/10.5194/tc-15-1845-2021 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-1845-2021 insu-03707765 https://hal-insu.archives-ouvertes.fr/insu-03707765 https://hal-insu.archives-ouvertes.fr/insu-03707765/document https://hal-insu.archives-ouvertes.fr/insu-03707765/file/tc-15-1845-2021.pdf BIBCODE: 2021TCry.15.1845J doi:10.5194/tc-15-1845-2021 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal-insu.archives-ouvertes.fr/insu-03707765 The Cryosphere, 2021, 15, pp.1845-1862. ⟨10.5194/tc-15-1845-2021⟩ [SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.5194/tc-15-1845-2021 2023-05-06T23:34:59Z International audience Glaciers are currently the largest contributor to sea level rise after ocean thermal expansion, contributing ∼ 30 % to the sea level budget. Global monitoring of these regions remains a challenging task since global estimates rely on a variety of observations and models to achieve the required spatial and temporal coverage, and significant differences remain between current estimates. Here we report the first application of a novel approach to retrieve spatially resolved elevation and mass change from radar altimetry over entire mountain glaciers areas. We apply interferometric swath altimetry to CryoSat-2 data acquired between 2010 and 2019 over High Mountain Asia (HMA) and in the Gulf of Alaska (GoA). In addition, we exploit CryoSat's monthly temporal repeat to reveal seasonal and multiannual variation in rates of glaciers' thinning at unprecedented spatial detail. We find that during this period, HMA and GoA have lost an average of −28.0 ± 3.0 Gt yr −1 (−0.29 ± 0.03 m w.e. yr −1 ) and −76.3 ± 5.7 Gt yr −1 (−0.89 ± 0.07 m w.e. yr −1 ), respectively, corresponding to a contribution to sea level rise of 0.078 ± 0.008 mm yr −1 (0.051 ± 0.006 mm yr −1 from exorheic basins) and 0.211 ± 0.016 mm yr −1 . The cumulative loss during the 9-year period is equivalent to 4.2 % and 4.3 % of the ice volume, respectively, for HMA and GoA. Glacier thinning is ubiquitous except for in the Karakoram-Kunlun region, which experiences stable or slightly positive mass balance. In the GoA region, the intensity of thinning varies spatially and temporally, with acceleration of mass loss from −0.06 ± 0.33 to −1.1 ± 0.06 m yr −1 from 2013, which correlates with the strength of the Pacific Decadal Oscillation. In HMA ice loss is sustained until 2015-2016, with a slight decrease in mass loss from 2016, with some evidence of mass gain locally from 2016-2017 onwards. Article in Journal/Newspaper glacier glaciers The Cryosphere Alaska Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Gulf of Alaska Pacific The Cryosphere 15 4 1845 1862 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Jakob, Livia Gourmelen, Noel Ewart, Martin Plummer, Stephen Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Glaciers are currently the largest contributor to sea level rise after ocean thermal expansion, contributing ∼ 30 % to the sea level budget. Global monitoring of these regions remains a challenging task since global estimates rely on a variety of observations and models to achieve the required spatial and temporal coverage, and significant differences remain between current estimates. Here we report the first application of a novel approach to retrieve spatially resolved elevation and mass change from radar altimetry over entire mountain glaciers areas. We apply interferometric swath altimetry to CryoSat-2 data acquired between 2010 and 2019 over High Mountain Asia (HMA) and in the Gulf of Alaska (GoA). In addition, we exploit CryoSat's monthly temporal repeat to reveal seasonal and multiannual variation in rates of glaciers' thinning at unprecedented spatial detail. We find that during this period, HMA and GoA have lost an average of −28.0 ± 3.0 Gt yr −1 (−0.29 ± 0.03 m w.e. yr −1 ) and −76.3 ± 5.7 Gt yr −1 (−0.89 ± 0.07 m w.e. yr −1 ), respectively, corresponding to a contribution to sea level rise of 0.078 ± 0.008 mm yr −1 (0.051 ± 0.006 mm yr −1 from exorheic basins) and 0.211 ± 0.016 mm yr −1 . The cumulative loss during the 9-year period is equivalent to 4.2 % and 4.3 % of the ice volume, respectively, for HMA and GoA. Glacier thinning is ubiquitous except for in the Karakoram-Kunlun region, which experiences stable or slightly positive mass balance. In the GoA region, the intensity of thinning varies spatially and temporally, with acceleration of mass loss from −0.06 ± 0.33 to −1.1 ± 0.06 m yr −1 from 2013, which correlates with the strength of the Pacific Decadal Oscillation. In HMA ice loss is sustained until 2015-2016, with a slight decrease in mass loss from 2016, with some evidence of mass gain locally from 2016-2017 onwards. |
author2 |
Institut de physique du globe de Strasbourg (IPGS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Jakob, Livia Gourmelen, Noel Ewart, Martin Plummer, Stephen |
author_facet |
Jakob, Livia Gourmelen, Noel Ewart, Martin Plummer, Stephen |
author_sort |
Jakob, Livia |
title |
Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 |
title_short |
Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 |
title_full |
Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 |
title_fullStr |
Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 |
title_full_unstemmed |
Spatially and temporally resolved ice loss in High Mountain Asia and the Gulf of Alaska observed by CryoSat-2 swath altimetry between 2010 and 2019 |
title_sort |
spatially and temporally resolved ice loss in high mountain asia and the gulf of alaska observed by cryosat-2 swath altimetry between 2010 and 2019 |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03707765 https://hal-insu.archives-ouvertes.fr/insu-03707765/document https://hal-insu.archives-ouvertes.fr/insu-03707765/file/tc-15-1845-2021.pdf https://doi.org/10.5194/tc-15-1845-2021 |
geographic |
Gulf of Alaska Pacific |
geographic_facet |
Gulf of Alaska Pacific |
genre |
glacier glaciers The Cryosphere Alaska |
genre_facet |
glacier glaciers The Cryosphere Alaska |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal-insu.archives-ouvertes.fr/insu-03707765 The Cryosphere, 2021, 15, pp.1845-1862. ⟨10.5194/tc-15-1845-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-1845-2021 insu-03707765 https://hal-insu.archives-ouvertes.fr/insu-03707765 https://hal-insu.archives-ouvertes.fr/insu-03707765/document https://hal-insu.archives-ouvertes.fr/insu-03707765/file/tc-15-1845-2021.pdf BIBCODE: 2021TCry.15.1845J doi:10.5194/tc-15-1845-2021 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-15-1845-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
4 |
container_start_page |
1845 |
op_container_end_page |
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1768387280188211200 |