Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming
Abstract The tropical Indian Ocean (TIO) has experienced enhanced surface warming relative to the tropical mean during the past century, but the underlying mechanisms remain unclear. Here we use single-forcing, large-ensemble coupled model simulations to demonstrate that changes of biomass burning (...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-06-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-39204-y |
| _version_ | 1827922919977648128 |
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| author | Yiqun Tian Shineng Hu Clara Deser |
| author_facet | Yiqun Tian Shineng Hu Clara Deser |
| author_sort | Yiqun Tian |
| collection | DOAJ |
| description | Abstract The tropical Indian Ocean (TIO) has experienced enhanced surface warming relative to the tropical mean during the past century, but the underlying mechanisms remain unclear. Here we use single-forcing, large-ensemble coupled model simulations to demonstrate that changes of biomass burning (BMB) aerosols have played a critical role in this TIO relative warming. Although the BMB aerosol changes have little effect on global mean temperatures due to regional cancellation, they significantly influence the pattern of warming over the tropical oceans. The reduction of BMB aerosols over the Indian subcontinent induces a TIO warming, while the increase of BMB aerosols over South America and Africa causes a cooling of the tropical Pacific and Atlantic, respectively. The resultant TIO relative warming leads to prominent global climate changes, including a westward expanded Indo-Pacific warm pool, a fresher TIO due to enhanced rainfall, and an intensified North Atlantic jet stream affecting European hydroclimate. |
| first_indexed | 2024-03-13T04:49:12Z |
| format | Article |
| id | doaj.art-25399b8dee174077992e4ed82772e3a8 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-13T04:49:12Z |
| publishDate | 2023-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-25399b8dee174077992e4ed82772e3a82023-06-18T11:18:53ZengNature PortfolioNature Communications2041-17232023-06-011411810.1038/s41467-023-39204-yCritical role of biomass burning aerosols in enhanced historical Indian Ocean warmingYiqun Tian0Shineng Hu1Clara Deser2Division of Earth and Climate Sciences, Nicholas School of the Environment, Duke UniversityDivision of Earth and Climate Sciences, Nicholas School of the Environment, Duke UniversityClimate and Global Dynamics, National Center for Atmospheric ResearchAbstract The tropical Indian Ocean (TIO) has experienced enhanced surface warming relative to the tropical mean during the past century, but the underlying mechanisms remain unclear. Here we use single-forcing, large-ensemble coupled model simulations to demonstrate that changes of biomass burning (BMB) aerosols have played a critical role in this TIO relative warming. Although the BMB aerosol changes have little effect on global mean temperatures due to regional cancellation, they significantly influence the pattern of warming over the tropical oceans. The reduction of BMB aerosols over the Indian subcontinent induces a TIO warming, while the increase of BMB aerosols over South America and Africa causes a cooling of the tropical Pacific and Atlantic, respectively. The resultant TIO relative warming leads to prominent global climate changes, including a westward expanded Indo-Pacific warm pool, a fresher TIO due to enhanced rainfall, and an intensified North Atlantic jet stream affecting European hydroclimate.https://doi.org/10.1038/s41467-023-39204-y |
| spellingShingle | Yiqun Tian Shineng Hu Clara Deser Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming Nature Communications |
| title | Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming |
| title_full | Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming |
| title_fullStr | Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming |
| title_full_unstemmed | Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming |
| title_short | Critical role of biomass burning aerosols in enhanced historical Indian Ocean warming |
| title_sort | critical role of biomass burning aerosols in enhanced historical indian ocean warming |
| url | https://doi.org/10.1038/s41467-023-39204-y |
| work_keys_str_mv | AT yiquntian criticalroleofbiomassburningaerosolsinenhancedhistoricalindianoceanwarming AT shinenghu criticalroleofbiomassburningaerosolsinenhancedhistoricalindianoceanwarming AT claradeser criticalroleofbiomassburningaerosolsinenhancedhistoricalindianoceanwarming |