High-latitude stratospheric aerosol injection to preserve the Arctic
Stratospheric aerosol injection (SAI) has been shown in climate models to reduce some impacts of global warming in the Arctic, including the loss of sea ice, permafrost thaw, and reduction of Greenland Ice Sheet (GrIS) mass; SAI at high latitudes could preferentially target these impacts. In this st...
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ftncar:oai:drupal-site.org:articles_26626 2024-06-23T07:49:02+00:00 High-latitude stratospheric aerosol injection to preserve the Arctic Lee, Walker Raymond (author) MacMartin, Douglas G. (author) Visioni, Daniele (author) Kravitz, Ben (author) Chen, Yating (author) Moore, John C. (author) Leguy, Gunter (author) Lawrence, David M. (author) Bailey, David A. (author) 2023-01 https://doi.org/10.1029/2022EF003052 en eng Earth's Future--Earth's Future--2328-4277--2328-4277 Data from: Scenarios for modeling solar radiation modification--10.7298/xr82-sv86 articles:26626 doi:10.1029/2022EF003052 ark:/85065/d7w95f7q Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. article Text 2023 ftncar https://doi.org/10.1029/2022EF003052 2024-05-27T14:15:41Z Stratospheric aerosol injection (SAI) has been shown in climate models to reduce some impacts of global warming in the Arctic, including the loss of sea ice, permafrost thaw, and reduction of Greenland Ice Sheet (GrIS) mass; SAI at high latitudes could preferentially target these impacts. In this study, we use the Community Earth System Model to simulate two Arctic-focused SAI strategies, which inject at 60 degrees N latitude each spring with injection rates adjusted to either maintain September Arctic sea ice at 2030 levels ("Arctic Low") or restore it to 2010 levels ("Arctic High"). Both simulations maintain or restore September sea ice to within 10% of their respective targets, reduce permafrost thaw, and increase GrIS surface mass balance by reducing runoff. Arctic High reduces these impacts more effectively than a globally focused SAI strategy that injects similar quantities of SO2 at lower latitudes. However, Arctic-focused SAI is not merely a "reset button" for the Arctic climate, but brings about a novel climate state, including changes to the seasonal cycles of Northern Hemisphere temperature and sea ice and less high-latitude carbon uptake relative to SSP2-4.5. Additionally, while Arctic-focused SAI produces the most cooling near the pole, its effects are not confined to the Arctic, including detectable cooling throughout most of the northern hemisphere for both simulations, increased mid-latitude sulfur deposition, and a southward shift of the location of the Intertropical Convergence Zone. For these reasons, it would be incorrect to consider Arctic-focused SAI as "local" geoengineering, even when compared to a globally focused strategy. 1852977 Article in Journal/Newspaper Arctic Global warming Greenland Ice Ice Sheet permafrost Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Greenland Earth's Future 11 1 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Stratospheric aerosol injection (SAI) has been shown in climate models to reduce some impacts of global warming in the Arctic, including the loss of sea ice, permafrost thaw, and reduction of Greenland Ice Sheet (GrIS) mass; SAI at high latitudes could preferentially target these impacts. In this study, we use the Community Earth System Model to simulate two Arctic-focused SAI strategies, which inject at 60 degrees N latitude each spring with injection rates adjusted to either maintain September Arctic sea ice at 2030 levels ("Arctic Low") or restore it to 2010 levels ("Arctic High"). Both simulations maintain or restore September sea ice to within 10% of their respective targets, reduce permafrost thaw, and increase GrIS surface mass balance by reducing runoff. Arctic High reduces these impacts more effectively than a globally focused SAI strategy that injects similar quantities of SO2 at lower latitudes. However, Arctic-focused SAI is not merely a "reset button" for the Arctic climate, but brings about a novel climate state, including changes to the seasonal cycles of Northern Hemisphere temperature and sea ice and less high-latitude carbon uptake relative to SSP2-4.5. Additionally, while Arctic-focused SAI produces the most cooling near the pole, its effects are not confined to the Arctic, including detectable cooling throughout most of the northern hemisphere for both simulations, increased mid-latitude sulfur deposition, and a southward shift of the location of the Intertropical Convergence Zone. For these reasons, it would be incorrect to consider Arctic-focused SAI as "local" geoengineering, even when compared to a globally focused strategy. 1852977 |
author2 |
Lee, Walker Raymond (author) MacMartin, Douglas G. (author) Visioni, Daniele (author) Kravitz, Ben (author) Chen, Yating (author) Moore, John C. (author) Leguy, Gunter (author) Lawrence, David M. (author) Bailey, David A. (author) |
format |
Article in Journal/Newspaper |
title |
High-latitude stratospheric aerosol injection to preserve the Arctic |
spellingShingle |
High-latitude stratospheric aerosol injection to preserve the Arctic |
title_short |
High-latitude stratospheric aerosol injection to preserve the Arctic |
title_full |
High-latitude stratospheric aerosol injection to preserve the Arctic |
title_fullStr |
High-latitude stratospheric aerosol injection to preserve the Arctic |
title_full_unstemmed |
High-latitude stratospheric aerosol injection to preserve the Arctic |
title_sort |
high-latitude stratospheric aerosol injection to preserve the arctic |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022EF003052 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Global warming Greenland Ice Ice Sheet permafrost Sea ice |
genre_facet |
Arctic Global warming Greenland Ice Ice Sheet permafrost Sea ice |
op_relation |
Earth's Future--Earth's Future--2328-4277--2328-4277 Data from: Scenarios for modeling solar radiation modification--10.7298/xr82-sv86 articles:26626 doi:10.1029/2022EF003052 ark:/85065/d7w95f7q |
op_rights |
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
op_doi |
https://doi.org/10.1029/2022EF003052 |
container_title |
Earth's Future |
container_volume |
11 |
container_issue |
1 |
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1802639314478170112 |