Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering
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...
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Language: | English |
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Copernicus Publications under license by EGU – European Geosciences Union GmbH
2022
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Online Access: | http://hdl.handle.net/10852/93435 http://urn.nb.no/URN:NBN:no-96006 https://doi.org/10.5194/tc-15-3013-2021 |
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ftoslouniv:oai:www.duo.uio.no:10852/93435 2023-05-15T16:25:57+02:00 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 J. 2022-03-01T19:36:22Z http://hdl.handle.net/10852/93435 http://urn.nb.no/URN:NBN:no-96006 https://doi.org/10.5194/tc-15-3013-2021 EN eng Copernicus Publications under license by EGU – European Geosciences Union GmbH http://urn.nb.no/URN:NBN:no-96006 Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, Peter J. . Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering. The Cryosphere. 2021, 15(6), 3013-3019 http://hdl.handle.net/10852/93435 2006820 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=15&rft.spage=3013&rft.date=2021 The Cryosphere 15 6 3013 3019 https://doi.org/10.5194/tc-15-3013-2021 URN:NBN:no-96006 Fulltext https://www.duo.uio.no/bitstream/handle/10852/93435/1/tc-15-3013-2021.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 1994-0416 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2022 ftoslouniv https://doi.org/10.5194/tc-15-3013-2021 2022-04-13T22:34:03Z 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/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 us to maintain a positive SMB until the end of this century without any reduction in our greenhouse gas emissions. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Greenland The Cryosphere 15 6 3013 3019 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
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/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 us to maintain a positive SMB until the end of this century without any reduction in our greenhouse gas emissions. |
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 J. |
spellingShingle |
Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, Peter J. Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering |
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 J. |
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 |
Copernicus Publications under license by EGU – European Geosciences Union GmbH |
publishDate |
2022 |
url |
http://hdl.handle.net/10852/93435 http://urn.nb.no/URN:NBN:no-96006 https://doi.org/10.5194/tc-15-3013-2021 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
1994-0416 |
op_relation |
http://urn.nb.no/URN:NBN:no-96006 Fettweis, Xavier Hofer, Stefan Séférian, Roland Amory, Charles Delhasse, Alison Doutreloup, Sébastien Kittel, Christoph Lang, Charlotte Van Bever, Joris Veillon, Florent Irvine, Peter J. . Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering. The Cryosphere. 2021, 15(6), 3013-3019 http://hdl.handle.net/10852/93435 2006820 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=15&rft.spage=3013&rft.date=2021 The Cryosphere 15 6 3013 3019 https://doi.org/10.5194/tc-15-3013-2021 URN:NBN:no-96006 Fulltext https://www.duo.uio.no/bitstream/handle/10852/93435/1/tc-15-3013-2021.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-15-3013-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
6 |
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3013 |
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3019 |
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