Modelling the evolution of Arctic multiyear sea ice over 2000–2018
International audience Abstract. Multiyear sea ice (MYI) cover in the Arctic has been monitored for decades using increasingly sophisticated remote sensing techniques, and these have documented a significant decline in MYI over time. However, such techniques are unable to differentiate between the p...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.univ-grenoble-alpes.fr/hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080/document https://hal.univ-grenoble-alpes.fr/hal-04266080/file/Regan2023_TheCryosphere.pdf https://doi.org/10.5194/tc-17-1873-2023 |
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ftinsu:oai:HAL:hal-04266080v1 2024-04-21T08:11:13+00:00 Modelling the evolution of Arctic multiyear sea ice over 2000–2018 Regan, Heather Rampal, Pierre Ólason, Einar Boutin, Guillaume Korosov, Anton Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2023 https://hal.univ-grenoble-alpes.fr/hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080/document https://hal.univ-grenoble-alpes.fr/hal-04266080/file/Regan2023_TheCryosphere.pdf https://doi.org/10.5194/tc-17-1873-2023 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-17-1873-2023 hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080/document https://hal.univ-grenoble-alpes.fr/hal-04266080/file/Regan2023_TheCryosphere.pdf doi:10.5194/tc-17-1873-2023 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.univ-grenoble-alpes.fr/hal-04266080 The Cryosphere, 2023, 17 (5), pp.1873-1893. ⟨10.5194/tc-17-1873-2023⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.5194/tc-17-1873-2023 2024-04-05T00:27:42Z International audience Abstract. Multiyear sea ice (MYI) cover in the Arctic has been monitored for decades using increasingly sophisticated remote sensing techniques, and these have documented a significant decline in MYI over time. However, such techniques are unable to differentiate between the processes affecting the evolution of the MYI. Further, estimating the thickness and thus the volume of MYI remains challenging. In this study we employ a sea ice–ocean model to investigate the changes to MYI over the period 2000–2018. We exploit the Lagrangian framework of the sea ice model to introduce a new method of tracking MYI area and volume which is based on identifying MYI during freeze onset each autumn. The model is found to successfully reproduce the spatial distribution and evolution of observed MYI extent. We discuss the balance of the processes (melt, ridging, export, and replenishment) linked to the general decline in MYI cover. The model suggests that rather than one process dominating the losses, there is an episodic imbalance between the different sources and sinks of MYI. We identify those key to the significant observed declines in 2007 and 2012; while melt and replenishment are important in 2012, sea ice dynamics play a significant role in 2007. Notably, the model suggests that in years such as 2007, convergence of the ice, through ridging, can result in large reductions in MYI area without a corresponding loss of MYI volume. This highlights the benefit of using models alongside satellite observations to aid interpretation of the observed MYI evolution in the Arctic. Article in Journal/Newspaper Sea ice The Cryosphere Institut national des sciences de l'Univers: HAL-INSU The Cryosphere 17 5 1873 1893 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Regan, Heather Rampal, Pierre Ólason, Einar Boutin, Guillaume Korosov, Anton Modelling the evolution of Arctic multiyear sea ice over 2000–2018 |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Abstract. Multiyear sea ice (MYI) cover in the Arctic has been monitored for decades using increasingly sophisticated remote sensing techniques, and these have documented a significant decline in MYI over time. However, such techniques are unable to differentiate between the processes affecting the evolution of the MYI. Further, estimating the thickness and thus the volume of MYI remains challenging. In this study we employ a sea ice–ocean model to investigate the changes to MYI over the period 2000–2018. We exploit the Lagrangian framework of the sea ice model to introduce a new method of tracking MYI area and volume which is based on identifying MYI during freeze onset each autumn. The model is found to successfully reproduce the spatial distribution and evolution of observed MYI extent. We discuss the balance of the processes (melt, ridging, export, and replenishment) linked to the general decline in MYI cover. The model suggests that rather than one process dominating the losses, there is an episodic imbalance between the different sources and sinks of MYI. We identify those key to the significant observed declines in 2007 and 2012; while melt and replenishment are important in 2012, sea ice dynamics play a significant role in 2007. Notably, the model suggests that in years such as 2007, convergence of the ice, through ridging, can result in large reductions in MYI area without a corresponding loss of MYI volume. This highlights the benefit of using models alongside satellite observations to aid interpretation of the observed MYI evolution in the Arctic. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Regan, Heather Rampal, Pierre Ólason, Einar Boutin, Guillaume Korosov, Anton |
author_facet |
Regan, Heather Rampal, Pierre Ólason, Einar Boutin, Guillaume Korosov, Anton |
author_sort |
Regan, Heather |
title |
Modelling the evolution of Arctic multiyear sea ice over 2000–2018 |
title_short |
Modelling the evolution of Arctic multiyear sea ice over 2000–2018 |
title_full |
Modelling the evolution of Arctic multiyear sea ice over 2000–2018 |
title_fullStr |
Modelling the evolution of Arctic multiyear sea ice over 2000–2018 |
title_full_unstemmed |
Modelling the evolution of Arctic multiyear sea ice over 2000–2018 |
title_sort |
modelling the evolution of arctic multiyear sea ice over 2000–2018 |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.univ-grenoble-alpes.fr/hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080/document https://hal.univ-grenoble-alpes.fr/hal-04266080/file/Regan2023_TheCryosphere.pdf https://doi.org/10.5194/tc-17-1873-2023 |
genre |
Sea ice The Cryosphere |
genre_facet |
Sea ice The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.univ-grenoble-alpes.fr/hal-04266080 The Cryosphere, 2023, 17 (5), pp.1873-1893. ⟨10.5194/tc-17-1873-2023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-17-1873-2023 hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080 https://hal.univ-grenoble-alpes.fr/hal-04266080/document https://hal.univ-grenoble-alpes.fr/hal-04266080/file/Regan2023_TheCryosphere.pdf doi:10.5194/tc-17-1873-2023 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-17-1873-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
5 |
container_start_page |
1873 |
op_container_end_page |
1893 |
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1796952930829467648 |