Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering
peer reviewed 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 sur...
Published in: | The Cryosphere |
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Copernicus
2021
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Online Access: | https://orbi.uliege.be/handle/2268/260751 https://orbi.uliege.be/bitstream/2268/260751/1/tc-15-3013-2021.pdf https://doi.org/10.5194/tc-15-3013-2021 |
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ftorbi:oai:orbi.ulg.ac.be:2268/260751 2024-04-21T08:03:07+00:00 Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering Fettweis, Xavier Hofer, Stefan Séférian, R. Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, P. Sphères - SPHERES 2021-06 https://orbi.uliege.be/handle/2268/260751 https://orbi.uliege.be/bitstream/2268/260751/1/tc-15-3013-2021.pdf https://doi.org/10.5194/tc-15-3013-2021 en eng Copernicus https://tc.copernicus.org/articles/15/3013/2021/ urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/260751 info:hdl:2268/260751 https://orbi.uliege.be/bitstream/2268/260751/1/tc-15-3013-2021.pdf doi:10.5194/tc-15-3013-2021 scopus-id:2-s2.0-85109202920 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess The Cryosphere, 15, 3013–3019 (2021-06) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2021 ftorbi https://doi.org/10.5194/tc-15-3013-2021 2024-03-27T14:58:15Z peer reviewed 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 of 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 case of 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/m2 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 to maintain positive SMB until the end of this century without any reduction ... Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere University of Liège: ORBi (Open Repository and Bibliography) The Cryosphere 15 6 3013 3019 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Fettweis, Xavier Hofer, Stefan Séférian, R. Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, P. Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed 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 of 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 case of 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/m2 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 to maintain positive SMB until the end of this century without any reduction ... |
author2 |
Sphères - SPHERES |
format |
Article in Journal/Newspaper |
author |
Fettweis, Xavier Hofer, Stefan Séférian, R. Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, P. |
author_facet |
Fettweis, Xavier Hofer, Stefan Séférian, R. Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, P. |
author_sort |
Fettweis, Xavier |
title |
Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_short |
Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_full |
Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_fullStr |
Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_full_unstemmed |
Brief Communication: Reduction of the future Greenland ice sheet surface melt with the help of solar geoengineering |
title_sort |
brief communication: reduction of the future greenland ice sheet surface melt with the help of solar geoengineering |
publisher |
Copernicus |
publishDate |
2021 |
url |
https://orbi.uliege.be/handle/2268/260751 https://orbi.uliege.be/bitstream/2268/260751/1/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 |
The Cryosphere, 15, 3013–3019 (2021-06) |
op_relation |
https://tc.copernicus.org/articles/15/3013/2021/ urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/260751 info:hdl:2268/260751 https://orbi.uliege.be/bitstream/2268/260751/1/tc-15-3013-2021.pdf doi:10.5194/tc-15-3013-2021 scopus-id:2-s2.0-85109202920 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 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 |
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1796943092553613312 |