Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0)
Changes in ocean-driven basal melting have a key influence on the stability of ice shelves, the mass loss from the ice sheet, ocean circulation, and global sea level rise. Coupled ice sheet–ocean models play a critical role in understanding future ice sheet evolution and examining the processes gove...
Published in: | Geoscientific Model Development |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
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Online Access: | https://hdl.handle.net/10037/27297 https://doi.org/10.5194/gmd-15-5421-2022 |
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ftunivtroemsoe:oai:munin.uit.no:10037/27297 2023-05-15T16:39:40+02:00 Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) Zhao, Chen Gladstone, Rupert Galton-Fenzi, Benjamin Keith Gwyther, David Hattermann, Tore 2022-07-15 https://hdl.handle.net/10037/27297 https://doi.org/10.5194/gmd-15-5421-2022 eng eng Copernicus Publications Geoscientific Model Development Zhao, Gladstone, Galton-Fenzi, Gwyther, Hattermann. Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0). Geoscientific Model Development. 2022;15(13):5421-5439 FRIDAID 2043688 doi:10.5194/gmd-15-5421-2022 1991-959X 1991-9603 https://hdl.handle.net/10037/27297 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 CC-BY VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Andre geofag: 469 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Other geosciences: 469 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.5194/gmd-15-5421-2022 2022-11-10T00:01:31Z Changes in ocean-driven basal melting have a key influence on the stability of ice shelves, the mass loss from the ice sheet, ocean circulation, and global sea level rise. Coupled ice sheet–ocean models play a critical role in understanding future ice sheet evolution and examining the processes governing ice sheet responses to basal melting. However, as a new approach, coupled ice sheet–ocean systems come with new challenges, and the impacts of solutions implemented to date have not been investigated. An emergent feature in several contributing coupled models to the 1st Marine Ice Sheet–Ocean Model Intercomparison Project (MISOMIP1) was a time-varying oscillation in basal melt rates. Here, we use a recently developed coupling framework, FISOC (v1.1), to connect the modified ocean model ROMSIceShelf (v1.0) and ice sheet model Elmer/Ice (v9.0), to investigate the origin and implications of the feature and, more generally, the impact of coupled modeling strategies on the simulated basal melt in an idealized ice shelf cavity based on the MISOMIP setup. We found the spatial-averaged basal melt rates (3.56 m yr−1) oscillated with an amplitude ∼0.7 m yr−1 and approximate period of ∼6 years between year 30 and 100 depending on the experimental design. The melt oscillations emerged in the coupled system and the standalone ocean model using a prescribed change of cavity geometry. We found that the oscillation feature is closely related to the discretized ungrounding of the ice sheet, exposing new ocean, and is likely strengthened by a combination of positive buoyancy–melt feedback and/or melt–geometry feedback near the grounding line, and the frequent coupling of ice geometry and ocean evolution. Sensitivity tests demonstrate that the oscillation feature is always present, regardless of the choice of coupling interval, vertical resolution in the ocean model, tracer properties of cells ungrounded by the retreating ice sheet, or the dependency of friction velocities to the vertical resolution. However, the amplitude, phase, ... Article in Journal/Newspaper Ice Sheet Ice Shelf Ice Shelves University of Tromsø: Munin Open Research Archive Geoscientific Model Development 15 13 5421 5439 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Andre geofag: 469 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Other geosciences: 469 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Andre geofag: 469 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Other geosciences: 469 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 Zhao, Chen Gladstone, Rupert Galton-Fenzi, Benjamin Keith Gwyther, David Hattermann, Tore Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Andre geofag: 469 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Other geosciences: 469 VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 |
description |
Changes in ocean-driven basal melting have a key influence on the stability of ice shelves, the mass loss from the ice sheet, ocean circulation, and global sea level rise. Coupled ice sheet–ocean models play a critical role in understanding future ice sheet evolution and examining the processes governing ice sheet responses to basal melting. However, as a new approach, coupled ice sheet–ocean systems come with new challenges, and the impacts of solutions implemented to date have not been investigated. An emergent feature in several contributing coupled models to the 1st Marine Ice Sheet–Ocean Model Intercomparison Project (MISOMIP1) was a time-varying oscillation in basal melt rates. Here, we use a recently developed coupling framework, FISOC (v1.1), to connect the modified ocean model ROMSIceShelf (v1.0) and ice sheet model Elmer/Ice (v9.0), to investigate the origin and implications of the feature and, more generally, the impact of coupled modeling strategies on the simulated basal melt in an idealized ice shelf cavity based on the MISOMIP setup. We found the spatial-averaged basal melt rates (3.56 m yr−1) oscillated with an amplitude ∼0.7 m yr−1 and approximate period of ∼6 years between year 30 and 100 depending on the experimental design. The melt oscillations emerged in the coupled system and the standalone ocean model using a prescribed change of cavity geometry. We found that the oscillation feature is closely related to the discretized ungrounding of the ice sheet, exposing new ocean, and is likely strengthened by a combination of positive buoyancy–melt feedback and/or melt–geometry feedback near the grounding line, and the frequent coupling of ice geometry and ocean evolution. Sensitivity tests demonstrate that the oscillation feature is always present, regardless of the choice of coupling interval, vertical resolution in the ocean model, tracer properties of cells ungrounded by the retreating ice sheet, or the dependency of friction velocities to the vertical resolution. However, the amplitude, phase, ... |
format |
Article in Journal/Newspaper |
author |
Zhao, Chen Gladstone, Rupert Galton-Fenzi, Benjamin Keith Gwyther, David Hattermann, Tore |
author_facet |
Zhao, Chen Gladstone, Rupert Galton-Fenzi, Benjamin Keith Gwyther, David Hattermann, Tore |
author_sort |
Zhao, Chen |
title |
Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) |
title_short |
Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) |
title_full |
Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) |
title_fullStr |
Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) |
title_full_unstemmed |
Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0) |
title_sort |
evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using fisoc (v1.1) - romsiceshelf (v1.0) - elmer/ice (v9.0) |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/27297 https://doi.org/10.5194/gmd-15-5421-2022 |
genre |
Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Ice Sheet Ice Shelf Ice Shelves |
op_relation |
Geoscientific Model Development Zhao, Gladstone, Galton-Fenzi, Gwyther, Hattermann. Evaluation of an emergent feature of sub-shelf melt oscillations from an idealized coupled ice sheet-ocean model using FISOC (v1.1) - ROMSIceShelf (v1.0) - Elmer/Ice (v9.0). Geoscientific Model Development. 2022;15(13):5421-5439 FRIDAID 2043688 doi:10.5194/gmd-15-5421-2022 1991-959X 1991-9603 https://hdl.handle.net/10037/27297 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/gmd-15-5421-2022 |
container_title |
Geoscientific Model Development |
container_volume |
15 |
container_issue |
13 |
container_start_page |
5421 |
op_container_end_page |
5439 |
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1766030007462789120 |