Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols
Abstract Sulfur‐based stratospheric aerosol intervention (SAI) can cool the climate, but also heats the tropical lower stratosphere if done with injections at low latitudes. We explore the role of this heating in the climate response to SAI, by using mechanistic experiments that remove the effects o...
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ftdoajarticles:oai:doaj.org/article:ce2c417ac9954209b6d1425dae250cf3 2024-09-15T17:43:46+00:00 Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols Elia Wunderlin Gabriel Chiodo Timofei Sukhodolov Sandro Vattioni Daniele Visioni Simone Tilmes 2024-02-01T00:00:00Z https://doi.org/10.1029/2023GL107285 https://doaj.org/article/ce2c417ac9954209b6d1425dae250cf3 EN eng Wiley https://doi.org/10.1029/2023GL107285 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL107285 https://doaj.org/article/ce2c417ac9954209b6d1425dae250cf3 Geophysical Research Letters, Vol 51, Iss 4, Pp n/a-n/a (2024) Geophysics. Cosmic physics QC801-809 article 2024 ftdoajarticles https://doi.org/10.1029/2023GL107285 2024-08-05T17:49:23Z Abstract Sulfur‐based stratospheric aerosol intervention (SAI) can cool the climate, but also heats the tropical lower stratosphere if done with injections at low latitudes. We explore the role of this heating in the climate response to SAI, by using mechanistic experiments that remove the effects of longwave absorption of sulfate aerosols above the tropopause. If longwave absorption by stratospheric aerosols is disabled, the heating of the tropical tropopause and most of the related side effects are strongly alleviated and the cooling per Tg‐S injected is 40% bigger. Such side‐effects include the poleward expansion of eddy‐driven jets, acceleration of the stratospheric residual circulation, and delay of Antarctic ozone recovery. Our results add to other recent findings on SAI side effects and demonstrate that SAI scenarios with low‐latitude injections of absorptive materials may result in atmospheric effects and regional climate changes that are comparable to those produced by the CO2 warming signal. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 51 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Geophysics. Cosmic physics QC801-809 Elia Wunderlin Gabriel Chiodo Timofei Sukhodolov Sandro Vattioni Daniele Visioni Simone Tilmes Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols |
topic_facet |
Geophysics. Cosmic physics QC801-809 |
description |
Abstract Sulfur‐based stratospheric aerosol intervention (SAI) can cool the climate, but also heats the tropical lower stratosphere if done with injections at low latitudes. We explore the role of this heating in the climate response to SAI, by using mechanistic experiments that remove the effects of longwave absorption of sulfate aerosols above the tropopause. If longwave absorption by stratospheric aerosols is disabled, the heating of the tropical tropopause and most of the related side effects are strongly alleviated and the cooling per Tg‐S injected is 40% bigger. Such side‐effects include the poleward expansion of eddy‐driven jets, acceleration of the stratospheric residual circulation, and delay of Antarctic ozone recovery. Our results add to other recent findings on SAI side effects and demonstrate that SAI scenarios with low‐latitude injections of absorptive materials may result in atmospheric effects and regional climate changes that are comparable to those produced by the CO2 warming signal. |
format |
Article in Journal/Newspaper |
author |
Elia Wunderlin Gabriel Chiodo Timofei Sukhodolov Sandro Vattioni Daniele Visioni Simone Tilmes |
author_facet |
Elia Wunderlin Gabriel Chiodo Timofei Sukhodolov Sandro Vattioni Daniele Visioni Simone Tilmes |
author_sort |
Elia Wunderlin |
title |
Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols |
title_short |
Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols |
title_full |
Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols |
title_fullStr |
Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols |
title_full_unstemmed |
Side Effects of Sulfur‐Based Geoengineering Due To Absorptivity of Sulfate Aerosols |
title_sort |
side effects of sulfur‐based geoengineering due to absorptivity of sulfate aerosols |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023GL107285 https://doaj.org/article/ce2c417ac9954209b6d1425dae250cf3 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geophysical Research Letters, Vol 51, Iss 4, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2023GL107285 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL107285 https://doaj.org/article/ce2c417ac9954209b6d1425dae250cf3 |
op_doi |
https://doi.org/10.1029/2023GL107285 |
container_title |
Geophysical Research Letters |
container_volume |
51 |
container_issue |
4 |
_version_ |
1810490916335517696 |