Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming
Abstract The extreme positive Indian Ocean Dipole (pIOD) in 2019 was followed by tropical Indian Ocean (TIO) basin‐wide warming in summer 2020, which contributed to severe flooding in the Yangtze River basin. Here, the potential relationship between extreme pIOD and subsequent summer TIO basin‐wide...
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL113719 |
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| author | Shaolei Tang Jing‐Jia Luo Zhiyuan Zhang |
| author_facet | Shaolei Tang Jing‐Jia Luo Zhiyuan Zhang |
| author_sort | Shaolei Tang |
| collection | DOAJ |
| description | Abstract The extreme positive Indian Ocean Dipole (pIOD) in 2019 was followed by tropical Indian Ocean (TIO) basin‐wide warming in summer 2020, which contributed to severe flooding in the Yangtze River basin. Here, the potential relationship between extreme pIOD and subsequent summer TIO basin‐wide warming is explored using observations and model outputs, revealing that this sequential co‐occurrence is significantly influenced by Pacific SST conditions. Extreme pIODs that coincide with El Niño tend to be followed by TIO basin‐wide warming, whereas those cooccurring with neutral or La Niña conditions are comparatively less likely to do so. This is because El Niño can trigger anomalous anticyclone over the southeastern TIO, thereby maintaining and reinforcing the extreme pIOD‐related warm SST anomalies over the southwestern TIO, which subsequently induces SST warming over the northern TIO in summer. Our findings highlight the important modulation role of Pacific SST conditions, with significant implications for regional climate predictions. |
| format | Article |
| id | doaj-art-c9fa10eac7664a2ba9bd1e27313b99a0 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-c9fa10eac7664a2ba9bd1e27313b99a02025-08-20T01:50:41ZengWileyGeophysical Research Letters0094-82761944-80072025-02-01524n/an/a10.1029/2024GL113719Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide WarmingShaolei Tang0Jing‐Jia Luo1Zhiyuan Zhang2College of Oceanography Hohai University Nanjing ChinaInstitute of Climate Application Research (ICAR)/School of Future Technology/CIC‐FEMD/KLME/ILCEC Nanjing University of Information Science and Technology Nanjing ChinaThe National Key Laboratory of Water Disaster Prevention Hohai University Nanjing ChinaAbstract The extreme positive Indian Ocean Dipole (pIOD) in 2019 was followed by tropical Indian Ocean (TIO) basin‐wide warming in summer 2020, which contributed to severe flooding in the Yangtze River basin. Here, the potential relationship between extreme pIOD and subsequent summer TIO basin‐wide warming is explored using observations and model outputs, revealing that this sequential co‐occurrence is significantly influenced by Pacific SST conditions. Extreme pIODs that coincide with El Niño tend to be followed by TIO basin‐wide warming, whereas those cooccurring with neutral or La Niña conditions are comparatively less likely to do so. This is because El Niño can trigger anomalous anticyclone over the southeastern TIO, thereby maintaining and reinforcing the extreme pIOD‐related warm SST anomalies over the southwestern TIO, which subsequently induces SST warming over the northern TIO in summer. Our findings highlight the important modulation role of Pacific SST conditions, with significant implications for regional climate predictions.https://doi.org/10.1029/2024GL113719Indian Ocean DipoleIndian Ocean basin‐wide warmingEl NiñoLa Niña |
| spellingShingle | Shaolei Tang Jing‐Jia Luo Zhiyuan Zhang Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming Geophysical Research Letters Indian Ocean Dipole Indian Ocean basin‐wide warming El Niño La Niña |
| title | Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming |
| title_full | Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming |
| title_fullStr | Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming |
| title_full_unstemmed | Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming |
| title_short | Pacific Controls the Co‐Occurrence of Extreme Positive Indian Ocean Dipole and the Following Summer Tropical Indian Ocean Basin‐Wide Warming |
| title_sort | pacific controls the co occurrence of extreme positive indian ocean dipole and the following summer tropical indian ocean basin wide warming |
| topic | Indian Ocean Dipole Indian Ocean basin‐wide warming El Niño La Niña |
| url | https://doi.org/10.1029/2024GL113719 |
| work_keys_str_mv | AT shaoleitang pacificcontrolsthecooccurrenceofextremepositiveindianoceandipoleandthefollowingsummertropicalindianoceanbasinwidewarming AT jingjialuo pacificcontrolsthecooccurrenceofextremepositiveindianoceandipoleandthefollowingsummertropicalindianoceanbasinwidewarming AT zhiyuanzhang pacificcontrolsthecooccurrenceofextremepositiveindianoceandipoleandthefollowingsummertropicalindianoceanbasinwidewarming |