Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols
<p>We use coupled and atmosphere-only simulations from the Precipitation Driver and Response Model Intercomparison Project (PDRMIP) to investigate the impacts of Asian anthropogenic sulfate aerosols on the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon (...
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Copernicus Publications
2025-08-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/25/8805/2025/acp-25-8805-2025.pdf |
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| author | Z. Jia Z. Jia M. A. Bollasina W. Zhang W. Zhang Y. Xiang |
| author_facet | Z. Jia Z. Jia M. A. Bollasina W. Zhang W. Zhang Y. Xiang |
| author_sort | Z. Jia |
| collection | DOAJ |
| description | <p>We use coupled and atmosphere-only simulations from the Precipitation Driver and Response Model Intercomparison Project (PDRMIP) to investigate the impacts of Asian anthropogenic sulfate aerosols on the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon (EAWM). In fully coupled simulations, aerosol-induced cooling extends southeastward to the Maritime Continent and the northwestern Pacific. Remotely, this broad cooling weakens the easterly trade winds over the central Pacific, which reduces the east–west equatorial Pacific sea surface temperature gradient. These changes contribute to increasing ENSO's amplitude by 17 %, mainly through strengthening the zonal wind forcing. Concurrently, the El Niño-related warm sea surface temperature (SST) anomalies and the ensuing Pacific–East Asia teleconnection pattern (i.e. the ENSO–EAWM link) intensify, leading to an increased EAWM amplitude by 18 % in the coupled simulations. Therefore, in response to the increasing frequency of El Niño and La Niña years under Asian sulfate aerosol forcing, the interannual variability of the EAWM increases, with more extreme EAWM years. The opposite variations in the interannual variability of the EAWM to Asian aerosols in atmosphere-only simulations (<span class="inline-formula">−19 <i>%</i></span>) further reflect the importance of ENSO-related atmosphere–ocean coupled processes. A better understanding of the changes in the year-to-year variability of the EAWM in response to aerosol forcing is critical to reducing uncertainties in future projections of variability of regional extremes, such as cold surges and flooding, which can cause large social and economic impacts on densely populated East Asia.</p> |
| format | Article |
| id | doaj-art-cd1a6b3791734c608a535731e71f00c8 |
| institution | Kabale University |
| issn | 1680-7316 1680-7324 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj-art-cd1a6b3791734c608a535731e71f00c82025-08-20T03:35:53ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242025-08-01258805882010.5194/acp-25-8805-2025Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosolsZ. Jia0Z. Jia1M. A. Bollasina2W. Zhang3W. Zhang4Y. Xiang5Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster of the Ministry of Education, State Key Laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science and Technology, Nanjing, ChinaSchool of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, ChinaSchool of GeoSciences, University of Edinburgh, Edinburgh, UKCollaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster of the Ministry of Education, State Key Laboratory of Climate System Prediction and Risk Management, Nanjing University of Information Science and Technology, Nanjing, ChinaSchool of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, ChinaJiangsu Climate Center, Nanjing, China<p>We use coupled and atmosphere-only simulations from the Precipitation Driver and Response Model Intercomparison Project (PDRMIP) to investigate the impacts of Asian anthropogenic sulfate aerosols on the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon (EAWM). In fully coupled simulations, aerosol-induced cooling extends southeastward to the Maritime Continent and the northwestern Pacific. Remotely, this broad cooling weakens the easterly trade winds over the central Pacific, which reduces the east–west equatorial Pacific sea surface temperature gradient. These changes contribute to increasing ENSO's amplitude by 17 %, mainly through strengthening the zonal wind forcing. Concurrently, the El Niño-related warm sea surface temperature (SST) anomalies and the ensuing Pacific–East Asia teleconnection pattern (i.e. the ENSO–EAWM link) intensify, leading to an increased EAWM amplitude by 18 % in the coupled simulations. Therefore, in response to the increasing frequency of El Niño and La Niña years under Asian sulfate aerosol forcing, the interannual variability of the EAWM increases, with more extreme EAWM years. The opposite variations in the interannual variability of the EAWM to Asian aerosols in atmosphere-only simulations (<span class="inline-formula">−19 <i>%</i></span>) further reflect the importance of ENSO-related atmosphere–ocean coupled processes. A better understanding of the changes in the year-to-year variability of the EAWM in response to aerosol forcing is critical to reducing uncertainties in future projections of variability of regional extremes, such as cold surges and flooding, which can cause large social and economic impacts on densely populated East Asia.</p>https://acp.copernicus.org/articles/25/8805/2025/acp-25-8805-2025.pdf |
| spellingShingle | Z. Jia Z. Jia M. A. Bollasina W. Zhang W. Zhang Y. Xiang Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols Atmospheric Chemistry and Physics |
| title | Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols |
| title_full | Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols |
| title_fullStr | Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols |
| title_full_unstemmed | Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols |
| title_short | Response of the link between the El Niño–Southern Oscillation (ENSO) and the East Asian winter monsoon to Asian anthropogenic sulfate aerosols |
| title_sort | response of the link between the el nino southern oscillation enso and the east asian winter monsoon to asian anthropogenic sulfate aerosols |
| url | https://acp.copernicus.org/articles/25/8805/2025/acp-25-8805-2025.pdf |
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