Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering
International audience The Greenland Ice Sheet (GrIS) will be losing mass at an accelerating pace throughout the 21st century, with a direct link between anthropogenic greenhouse gas emissions and the magnitude of Greenland mass loss. Currently, approximately 60 % of the mass loss contribution comes...
Published in: | The Cryosphere |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Subjects: | |
Online Access: | https://insu.hal.science/insu-03668379 https://insu.hal.science/insu-03668379/document https://insu.hal.science/insu-03668379/file/tc-15-3013-2021.pdf https://doi.org/10.5194/tc-15-3013-2021 |
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ftunigrenoble:oai:HAL:insu-03668379v1 |
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Université Grenoble Alpes: HAL |
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English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte van Bever, Joris Veillon, Florent Irvine, Peter Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The Greenland Ice Sheet (GrIS) will be losing mass at an accelerating pace throughout the 21st century, with a direct link between anthropogenic greenhouse gas emissions and the magnitude of Greenland mass loss. Currently, approximately 60 % of the mass loss contribution comes from surface melt and subsequent meltwater runoff, while 40 % are due to ice calving. In the ablation zone covered by bare ice in summer, most of the surface melt energy is provided by absorbed shortwave fluxes, which could be reduced by solar geoengineering measures. However, so far very little is known about the potential impacts of an artificial reduction in the incoming solar radiation on the GrIS surface energy budget and the subsequent change in meltwater production. By forcing the regional climate model MAR with the latest CMIP6 shared socioeconomic pathways (SSP) future emission scenarios (SSP245, SSP585) and associated G6solar experiment from the CNRM-ESM2-1 Earth system model, we estimate the local impact of a reduced solar constant on the projected GrIS surface mass balance (SMB) decrease. Overall, our results show that even in the case of a low-mitigation greenhouse gas emissions scenario (SSP585), the Greenland surface mass loss can be brought in line with the medium-mitigation emissions scenario (SSP245) by reducing the solar downward flux at the top of the atmosphere by ∼ 40 W/m 2 or ∼ 1.5 % (using the G6solar experiment). In addition to reducing global warming in line with SSP245, G6solar also decreases the efficiency of surface meltwater production over the Greenland ice sheet by damping the well-known positive melt-albedo feedback. With respect to a MAR simulation where the solar constant remains unchanged, decreasing the solar constant according to G6solar in the MAR radiative scheme mitigates the projected Greenland ice sheet surface melt increase by 6 %. However, only more constraining geoengineering experiments than G6solar would allow us to maintain a positive SMB until the end of this ... |
author2 |
Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte van Bever, Joris Veillon, Florent Irvine, Peter |
author_facet |
Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte van Bever, Joris Veillon, Florent Irvine, Peter |
author_sort |
Fettweis, Xavier |
title |
Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_short |
Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_full |
Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_fullStr |
Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_full_unstemmed |
Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_sort |
brief communication: reduction in the future greenland ice sheet surface melt with the help of solar geoengineering |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03668379 https://insu.hal.science/insu-03668379/document https://insu.hal.science/insu-03668379/file/tc-15-3013-2021.pdf https://doi.org/10.5194/tc-15-3013-2021 |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03668379 The Cryosphere, 2021, 15, pp.3013-3019. ⟨10.5194/tc-15-3013-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-3013-2021 insu-03668379 https://insu.hal.science/insu-03668379 https://insu.hal.science/insu-03668379/document https://insu.hal.science/insu-03668379/file/tc-15-3013-2021.pdf BIBCODE: 2021TCry.15.3013F doi:10.5194/tc-15-3013-2021 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-15-3013-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
6 |
container_start_page |
3013 |
op_container_end_page |
3019 |
_version_ |
1810446154797678592 |
spelling |
ftunigrenoble:oai:HAL:insu-03668379v1 2024-09-15T18:08:47+00:00 Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte van Bever, Joris Veillon, Florent Irvine, Peter Centre national de recherches météorologiques (CNRM) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2021 https://insu.hal.science/insu-03668379 https://insu.hal.science/insu-03668379/document https://insu.hal.science/insu-03668379/file/tc-15-3013-2021.pdf https://doi.org/10.5194/tc-15-3013-2021 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-3013-2021 insu-03668379 https://insu.hal.science/insu-03668379 https://insu.hal.science/insu-03668379/document https://insu.hal.science/insu-03668379/file/tc-15-3013-2021.pdf BIBCODE: 2021TCry.15.3013F doi:10.5194/tc-15-3013-2021 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03668379 The Cryosphere, 2021, 15, pp.3013-3019. ⟨10.5194/tc-15-3013-2021⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftunigrenoble https://doi.org/10.5194/tc-15-3013-2021 2024-06-25T00:01:04Z International audience The Greenland Ice Sheet (GrIS) will be losing mass at an accelerating pace throughout the 21st century, with a direct link between anthropogenic greenhouse gas emissions and the magnitude of Greenland mass loss. Currently, approximately 60 % of the mass loss contribution comes from surface melt and subsequent meltwater runoff, while 40 % are due to ice calving. In the ablation zone covered by bare ice in summer, most of the surface melt energy is provided by absorbed shortwave fluxes, which could be reduced by solar geoengineering measures. However, so far very little is known about the potential impacts of an artificial reduction in the incoming solar radiation on the GrIS surface energy budget and the subsequent change in meltwater production. By forcing the regional climate model MAR with the latest CMIP6 shared socioeconomic pathways (SSP) future emission scenarios (SSP245, SSP585) and associated G6solar experiment from the CNRM-ESM2-1 Earth system model, we estimate the local impact of a reduced solar constant on the projected GrIS surface mass balance (SMB) decrease. Overall, our results show that even in the case of a low-mitigation greenhouse gas emissions scenario (SSP585), the Greenland surface mass loss can be brought in line with the medium-mitigation emissions scenario (SSP245) by reducing the solar downward flux at the top of the atmosphere by ∼ 40 W/m 2 or ∼ 1.5 % (using the G6solar experiment). In addition to reducing global warming in line with SSP245, G6solar also decreases the efficiency of surface meltwater production over the Greenland ice sheet by damping the well-known positive melt-albedo feedback. With respect to a MAR simulation where the solar constant remains unchanged, decreasing the solar constant according to G6solar in the MAR radiative scheme mitigates the projected Greenland ice sheet surface melt increase by 6 %. However, only more constraining geoengineering experiments than G6solar would allow us to maintain a positive SMB until the end of this ... Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Université Grenoble Alpes: HAL The Cryosphere 15 6 3013 3019 |