South Atlantic subtropical anticyclone responses to stratospheric aerosol injection
The South Atlantic Subtropical Anticyclone (SASA) is a key component of large-scale atmospheric circulation and is responsible for driving the climate in eastern Brazil and western Africa. Climate projections under warming scenarios suggest a strengthening, as well as a westward and southward expans...
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| Format: | Article |
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IOP Publishing
2025-01-01
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| Series: | Environmental Research: Climate |
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| Online Access: | https://doi.org/10.1088/2752-5295/ada8cb |
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| author | Thales Chile Baldoni Michelle Simões Reboita Natália Machado Crespo João Gabriel Martins Ribeiro Rosmeri Porfírio da Rocha |
| author_facet | Thales Chile Baldoni Michelle Simões Reboita Natália Machado Crespo João Gabriel Martins Ribeiro Rosmeri Porfírio da Rocha |
| author_sort | Thales Chile Baldoni |
| collection | DOAJ |
| description | The South Atlantic Subtropical Anticyclone (SASA) is a key component of large-scale atmospheric circulation and is responsible for driving the climate in eastern Brazil and western Africa. Climate projections under warming scenarios suggest a strengthening, as well as a westward and southward expansion of this system. However, little is known about how the combination of global warming and climate intervention affects this system. To address this, SASA was identified from 2015 to 2099 in a set of projections with and without stratospheric aerosol injection (SAI). Projections were obtained from different initiatives: the Assessing Responses and Impacts of Solar Climate Intervention on the Earth System with SAI using Community Earth System Model version 2 (CESM2) global climate model, the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) using CESM1, and the Geoengineering Model Intercomparison Project (GeoMIP/G6sulfur) using Max Planck Institute Earth System Model. As each project has its own specific model, scenario, SAI location, etc, no intercomparison was carried out among them. Instead, there is an indication of what occurs in each project when comparing the near (2040–2059) and the far future (2080–2099) projections under SAI and no-SAI scenarios. SASA under no-SAI scenarios, compared to the reference period (2015–2024), follows the pattern described in the literature, i.e. a tendency to be stronger and wider. However, these features are more evident in the GLENS project. This same project suggests that SAI scenarios contribute to reducing the impact of global warming on the SASA climatology, as SASA in the future acquires characteristics similar to those of the reference period. One of the possibilities for it is that GLENS has the largest SAI forcing, given that the goal was to cancel out the strong greenhouse gas-induced warming in Representative Concentration Pathway 8.5. |
| format | Article |
| id | doaj-art-d72c72488a644dca8426e55dcc16e665 |
| institution | Kabale University |
| issn | 2752-5295 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research: Climate |
| spelling | doaj-art-d72c72488a644dca8426e55dcc16e6652025-01-24T14:01:22ZengIOP PublishingEnvironmental Research: Climate2752-52952025-01-014101500310.1088/2752-5295/ada8cbSouth Atlantic subtropical anticyclone responses to stratospheric aerosol injectionThales Chile Baldoni0https://orcid.org/0000-0002-6947-252XMichelle Simões Reboita1https://orcid.org/0000-0002-1734-2395Natália Machado Crespo2https://orcid.org/0000-0002-3585-5100João Gabriel Martins Ribeiro3https://orcid.org/0000-0002-9854-8693Rosmeri Porfírio da Rocha4https://orcid.org/0000-0003-3378-393XInstituto de Recursos Naturais, Universidade Federal de Itajubá , Av. BPS, 1303—CEP 37500-903, Itajubá, MG, BrazilInstituto de Recursos Naturais, Universidade Federal de Itajubá , Av. BPS, 1303—CEP 37500-903, Itajubá, MG, BrazilDepartment of Atmospheric Physics, Faculty of Mathematics and Physics, Charles University , Prague, Czech RepublicInstituto de Recursos Naturais, Universidade Federal de Itajubá , Av. BPS, 1303—CEP 37500-903, Itajubá, MG, BrazilDepartamento de Ciências Atmosféricas, Universidade de São Paulo , São Paulo, BrazilThe South Atlantic Subtropical Anticyclone (SASA) is a key component of large-scale atmospheric circulation and is responsible for driving the climate in eastern Brazil and western Africa. Climate projections under warming scenarios suggest a strengthening, as well as a westward and southward expansion of this system. However, little is known about how the combination of global warming and climate intervention affects this system. To address this, SASA was identified from 2015 to 2099 in a set of projections with and without stratospheric aerosol injection (SAI). Projections were obtained from different initiatives: the Assessing Responses and Impacts of Solar Climate Intervention on the Earth System with SAI using Community Earth System Model version 2 (CESM2) global climate model, the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) using CESM1, and the Geoengineering Model Intercomparison Project (GeoMIP/G6sulfur) using Max Planck Institute Earth System Model. As each project has its own specific model, scenario, SAI location, etc, no intercomparison was carried out among them. Instead, there is an indication of what occurs in each project when comparing the near (2040–2059) and the far future (2080–2099) projections under SAI and no-SAI scenarios. SASA under no-SAI scenarios, compared to the reference period (2015–2024), follows the pattern described in the literature, i.e. a tendency to be stronger and wider. However, these features are more evident in the GLENS project. This same project suggests that SAI scenarios contribute to reducing the impact of global warming on the SASA climatology, as SASA in the future acquires characteristics similar to those of the reference period. One of the possibilities for it is that GLENS has the largest SAI forcing, given that the goal was to cancel out the strong greenhouse gas-induced warming in Representative Concentration Pathway 8.5.https://doi.org/10.1088/2752-5295/ada8cbsubtropical anticycloneSouth Atlantic Oceanglobal warmingclimate interventiongeoengineeringaerosol injection |
| spellingShingle | Thales Chile Baldoni Michelle Simões Reboita Natália Machado Crespo João Gabriel Martins Ribeiro Rosmeri Porfírio da Rocha South Atlantic subtropical anticyclone responses to stratospheric aerosol injection Environmental Research: Climate subtropical anticyclone South Atlantic Ocean global warming climate intervention geoengineering aerosol injection |
| title | South Atlantic subtropical anticyclone responses to stratospheric aerosol injection |
| title_full | South Atlantic subtropical anticyclone responses to stratospheric aerosol injection |
| title_fullStr | South Atlantic subtropical anticyclone responses to stratospheric aerosol injection |
| title_full_unstemmed | South Atlantic subtropical anticyclone responses to stratospheric aerosol injection |
| title_short | South Atlantic subtropical anticyclone responses to stratospheric aerosol injection |
| title_sort | south atlantic subtropical anticyclone responses to stratospheric aerosol injection |
| topic | subtropical anticyclone South Atlantic Ocean global warming climate intervention geoengineering aerosol injection |
| url | https://doi.org/10.1088/2752-5295/ada8cb |
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