The evolution of future Antarctic surface melt using PISM-dEBM-simple
It is virtually certain that Antarctica's contribution to sea-level rise will increase with future warming, although competing mass balance processes hamper accurate quantification of the exact magnitudes. Today, ocean-induced melting underneath the floating ice shelves dominates mass losses, b...
Published in: | The Cryosphere |
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Copernicus Publications
2023
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Online Access: | https://epic.awi.de/id/eprint/58751/ https://epic.awi.de/id/eprint/58751/1/tc-17-4571-2023.pdf https://doi.org/10.5194/tc-17-4571-2023 https://hdl.handle.net/10013/epic.55e60970-969c-4a01-b658-513fcbfa3579 |
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ftawi:oai:epic.awi.de:58751 2024-06-02T07:57:33+00:00 The evolution of future Antarctic surface melt using PISM-dEBM-simple Garbe, Julius Zeitz, Maria Krebs-Kanzow, Uta Winkelmann, Ricarda van den Broeke, Michiel 2023-11-02 application/pdf https://epic.awi.de/id/eprint/58751/ https://epic.awi.de/id/eprint/58751/1/tc-17-4571-2023.pdf https://doi.org/10.5194/tc-17-4571-2023 https://hdl.handle.net/10013/epic.55e60970-969c-4a01-b658-513fcbfa3579 unknown Copernicus Publications https://epic.awi.de/id/eprint/58751/1/tc-17-4571-2023.pdf Garbe, J. , Zeitz, M. , Krebs-Kanzow, U. orcid:0000-0002-3244-6491 and Winkelmann, R. (2023) The evolution of future Antarctic surface melt using PISM-dEBM-simple / M. van den Broeke (editor) , The Cryosphere, 17 (11), pp. 4571-4599 . doi:10.5194/tc-17-4571-2023 <https://doi.org/10.5194/tc-17-4571-2023> , hdl:10013/epic.55e60970-969c-4a01-b658-513fcbfa3579 EPIC3The Cryosphere, Copernicus Publications, 17(11), pp. 4571-4599, ISSN: 1994-0416 Article isiRev 2023 ftawi https://doi.org/10.5194/tc-17-4571-2023 2024-05-07T23:37:52Z It is virtually certain that Antarctica's contribution to sea-level rise will increase with future warming, although competing mass balance processes hamper accurate quantification of the exact magnitudes. Today, ocean-induced melting underneath the floating ice shelves dominates mass losses, but melting at the surface will gain importance as global warming continues. Meltwater at the ice surface has crucial implications for the ice sheet's stability, as it increases the risk of hydrofracturing and ice-shelf collapse that could cause enhanced glacier outflow into the ocean. Simultaneously, positive feedbacks between ice and atmosphere can accelerate mass losses and increase the ice sheet's sensitivity to warming. However, due to long response times, it may take hundreds to thousands of years until the ice sheet fully adjusts to the environmental changes. Therefore, ice-sheet model simulations must be computationally fast and capture the relevant feedbacks, including the ones at the ice-atmosphere interface. Here we use the novel surface melt module dEBM-simple (a slightly modified version of the "simple"diurnal Energy Balance Model) coupled to the Parallel Ice Sheet Model (PISM, together referred to as PISM-dEBM-simple) to estimate the impact of 21st-century atmospheric warming on Antarctic surface melt and ice dynamics. As an enhancement compared to the widely adopted positive degree-day (PDD) scheme, dEBM-simple includes an implicit diurnal cycle and computes melt not only from the temperature, but also from the influence of solar radiation and changes in ice albedo, thus accounting for the melt-albedo feedback. We calibrate PISM-dEBM-simple to reproduce historical and present-day Antarctic surface melt rates given by the regional atmospheric climate model RACMO2.3p2 and use the calibrated model to assess the range of possible future surface melt trajectories under Shared Socioeconomic Pathway SSP5-8.5 warming projections until the year 2100. To investigate the committed impacts of the enhanced surface melting ... Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves The Cryosphere Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic The Cryosphere 17 11 4571 4599 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
It is virtually certain that Antarctica's contribution to sea-level rise will increase with future warming, although competing mass balance processes hamper accurate quantification of the exact magnitudes. Today, ocean-induced melting underneath the floating ice shelves dominates mass losses, but melting at the surface will gain importance as global warming continues. Meltwater at the ice surface has crucial implications for the ice sheet's stability, as it increases the risk of hydrofracturing and ice-shelf collapse that could cause enhanced glacier outflow into the ocean. Simultaneously, positive feedbacks between ice and atmosphere can accelerate mass losses and increase the ice sheet's sensitivity to warming. However, due to long response times, it may take hundreds to thousands of years until the ice sheet fully adjusts to the environmental changes. Therefore, ice-sheet model simulations must be computationally fast and capture the relevant feedbacks, including the ones at the ice-atmosphere interface. Here we use the novel surface melt module dEBM-simple (a slightly modified version of the "simple"diurnal Energy Balance Model) coupled to the Parallel Ice Sheet Model (PISM, together referred to as PISM-dEBM-simple) to estimate the impact of 21st-century atmospheric warming on Antarctic surface melt and ice dynamics. As an enhancement compared to the widely adopted positive degree-day (PDD) scheme, dEBM-simple includes an implicit diurnal cycle and computes melt not only from the temperature, but also from the influence of solar radiation and changes in ice albedo, thus accounting for the melt-albedo feedback. We calibrate PISM-dEBM-simple to reproduce historical and present-day Antarctic surface melt rates given by the regional atmospheric climate model RACMO2.3p2 and use the calibrated model to assess the range of possible future surface melt trajectories under Shared Socioeconomic Pathway SSP5-8.5 warming projections until the year 2100. To investigate the committed impacts of the enhanced surface melting ... |
author2 |
van den Broeke, Michiel |
format |
Article in Journal/Newspaper |
author |
Garbe, Julius Zeitz, Maria Krebs-Kanzow, Uta Winkelmann, Ricarda |
spellingShingle |
Garbe, Julius Zeitz, Maria Krebs-Kanzow, Uta Winkelmann, Ricarda The evolution of future Antarctic surface melt using PISM-dEBM-simple |
author_facet |
Garbe, Julius Zeitz, Maria Krebs-Kanzow, Uta Winkelmann, Ricarda |
author_sort |
Garbe, Julius |
title |
The evolution of future Antarctic surface melt using PISM-dEBM-simple |
title_short |
The evolution of future Antarctic surface melt using PISM-dEBM-simple |
title_full |
The evolution of future Antarctic surface melt using PISM-dEBM-simple |
title_fullStr |
The evolution of future Antarctic surface melt using PISM-dEBM-simple |
title_full_unstemmed |
The evolution of future Antarctic surface melt using PISM-dEBM-simple |
title_sort |
evolution of future antarctic surface melt using pism-debm-simple |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58751/ https://epic.awi.de/id/eprint/58751/1/tc-17-4571-2023.pdf https://doi.org/10.5194/tc-17-4571-2023 https://hdl.handle.net/10013/epic.55e60970-969c-4a01-b658-513fcbfa3579 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves The Cryosphere |
op_source |
EPIC3The Cryosphere, Copernicus Publications, 17(11), pp. 4571-4599, ISSN: 1994-0416 |
op_relation |
https://epic.awi.de/id/eprint/58751/1/tc-17-4571-2023.pdf Garbe, J. , Zeitz, M. , Krebs-Kanzow, U. orcid:0000-0002-3244-6491 and Winkelmann, R. (2023) The evolution of future Antarctic surface melt using PISM-dEBM-simple / M. van den Broeke (editor) , The Cryosphere, 17 (11), pp. 4571-4599 . doi:10.5194/tc-17-4571-2023 <https://doi.org/10.5194/tc-17-4571-2023> , hdl:10013/epic.55e60970-969c-4a01-b658-513fcbfa3579 |
op_doi |
https://doi.org/10.5194/tc-17-4571-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
11 |
container_start_page |
4571 |
op_container_end_page |
4599 |
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1800740711850573824 |