Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3)
International audience Oceanic melting beneath ice shelves is the main driver of the current mass loss of the Antarctic ice sheet and is mostly parameterised in stand-alone ice-sheet modelling. Parameterisations are crude representations of reality, and their response to ocean warming has not been c...
Published in: | Geoscientific Model Development |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Subjects: | |
Online Access: | https://hal.science/hal-02401404 https://hal.science/hal-02401404/document https://hal.science/hal-02401404/file/favier_GMD_2019.pdf https://doi.org/10.5194/gmd-12-2255-2019 |
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ftunivnantes:oai:HAL:hal-02401404v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Favier, Lionel Jourdain, Nicolas Jenkins, Adrian Merino, Nacho Durand, Gaël Gagliardini, Olivier Gillet-Chaulet, Fabien Mathiot, Pierre Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Oceanic melting beneath ice shelves is the main driver of the current mass loss of the Antarctic ice sheet and is mostly parameterised in stand-alone ice-sheet modelling. Parameterisations are crude representations of reality, and their response to ocean warming has not been compared to 3-D ocean-ice-sheet coupled models. Here, we assess various melting parameterisations ranging from simple scalings with far-field thermal driving to emulators of box and plume models , using a new coupling framework combining the ocean model NEMO and the ice-sheet model Elmer/Ice. We define six idealised one-century scenarios for the far-field ocean ranging from cold to warm, and representative of potential futures for typical Antarctic ice shelves. The scenarios are used to constrain an idealised geometry of the Pine Island glacier representative of a relatively small cavity. Melt rates and sea-level contributions obtained with the parameterised stand-alone ice-sheet model are compared to the coupled model results. The plume parameterisations give good results for cold scenarios but fail and underestimate sea level contribution by tens of percent for warm(ing) scenarios, which may be improved by adapting its empirical scaling. The box parameterisation with five boxes compares fairly well to the coupled results for almost all scenarios, but further work is needed to grasp the correct number of boxes. For simple scal-ings, the comparison to the coupled framework shows that a quadratic as opposed to linear dependency on thermal forcing is required. In addition, the quadratic dependency is improved when melting depends on both local and non-local, i.e. averaged over the ice shelf, thermal forcing. The results of both the box and the two quadratic parameterisations fall within or close to the coupled model uncertainty. All param-eterisations overestimate melting for thin ice shelves while underestimating melting in deep water near the grounding line. Further work is therefore needed to assess the validity of ... |
author2 |
Laboratoire sols, solides, structures - risques Grenoble (3SR ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) United Kingdom Met Office Exeter |
format |
Article in Journal/Newspaper |
author |
Favier, Lionel Jourdain, Nicolas Jenkins, Adrian Merino, Nacho Durand, Gaël Gagliardini, Olivier Gillet-Chaulet, Fabien Mathiot, Pierre |
author_facet |
Favier, Lionel Jourdain, Nicolas Jenkins, Adrian Merino, Nacho Durand, Gaël Gagliardini, Olivier Gillet-Chaulet, Fabien Mathiot, Pierre |
author_sort |
Favier, Lionel |
title |
Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) |
title_short |
Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) |
title_full |
Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) |
title_fullStr |
Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) |
title_full_unstemmed |
Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) |
title_sort |
assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model nemo(v3.6)-elmer/ice(v8.3) |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02401404 https://hal.science/hal-02401404/document https://hal.science/hal-02401404/file/favier_GMD_2019.pdf https://doi.org/10.5194/gmd-12-2255-2019 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Pine Island Glacier The Antarctic |
geographic_facet |
Antarctic Pine Island Glacier The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier |
op_source |
ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-02401404 Geoscientific Model Development, 2019, 12, pp.2255 - 2283. ⟨10.5194/gmd-12-2255-2019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-12-2255-2019 hal-02401404 https://hal.science/hal-02401404 https://hal.science/hal-02401404/document https://hal.science/hal-02401404/file/favier_GMD_2019.pdf doi:10.5194/gmd-12-2255-2019 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gmd-12-2255-2019 |
container_title |
Geoscientific Model Development |
container_volume |
12 |
container_issue |
6 |
container_start_page |
2255 |
op_container_end_page |
2283 |
_version_ |
1766258044156510208 |
spelling |
ftunivnantes:oai:HAL:hal-02401404v1 2023-05-15T13:53:05+02:00 Assessment of sub-shelf melting parameterisations using the ocean-ice-sheet coupled model NEMO(v3.6)-Elmer/Ice(v8.3) Favier, Lionel Jourdain, Nicolas Jenkins, Adrian Merino, Nacho Durand, Gaël Gagliardini, Olivier Gillet-Chaulet, Fabien Mathiot, Pierre Laboratoire sols, solides, structures - risques Grenoble (3SR ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) United Kingdom Met Office Exeter 2019 https://hal.science/hal-02401404 https://hal.science/hal-02401404/document https://hal.science/hal-02401404/file/favier_GMD_2019.pdf https://doi.org/10.5194/gmd-12-2255-2019 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-12-2255-2019 hal-02401404 https://hal.science/hal-02401404 https://hal.science/hal-02401404/document https://hal.science/hal-02401404/file/favier_GMD_2019.pdf doi:10.5194/gmd-12-2255-2019 info:eu-repo/semantics/OpenAccess ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-02401404 Geoscientific Model Development, 2019, 12, pp.2255 - 2283. ⟨10.5194/gmd-12-2255-2019⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.5194/gmd-12-2255-2019 2023-03-01T04:04:27Z International audience Oceanic melting beneath ice shelves is the main driver of the current mass loss of the Antarctic ice sheet and is mostly parameterised in stand-alone ice-sheet modelling. Parameterisations are crude representations of reality, and their response to ocean warming has not been compared to 3-D ocean-ice-sheet coupled models. Here, we assess various melting parameterisations ranging from simple scalings with far-field thermal driving to emulators of box and plume models , using a new coupling framework combining the ocean model NEMO and the ice-sheet model Elmer/Ice. We define six idealised one-century scenarios for the far-field ocean ranging from cold to warm, and representative of potential futures for typical Antarctic ice shelves. The scenarios are used to constrain an idealised geometry of the Pine Island glacier representative of a relatively small cavity. Melt rates and sea-level contributions obtained with the parameterised stand-alone ice-sheet model are compared to the coupled model results. The plume parameterisations give good results for cold scenarios but fail and underestimate sea level contribution by tens of percent for warm(ing) scenarios, which may be improved by adapting its empirical scaling. The box parameterisation with five boxes compares fairly well to the coupled results for almost all scenarios, but further work is needed to grasp the correct number of boxes. For simple scal-ings, the comparison to the coupled framework shows that a quadratic as opposed to linear dependency on thermal forcing is required. In addition, the quadratic dependency is improved when melting depends on both local and non-local, i.e. averaged over the ice shelf, thermal forcing. The results of both the box and the two quadratic parameterisations fall within or close to the coupled model uncertainty. All param-eterisations overestimate melting for thin ice shelves while underestimating melting in deep water near the grounding line. Further work is therefore needed to assess the validity of ... Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Pine Island Glacier Université de Nantes: HAL-UNIV-NANTES Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic Geoscientific Model Development 12 6 2255 2283 |