Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean
Abstract The Southeast Tropical Indian Ocean (SETIO), dominated by the Indian Ocean monsoon, is an important source region for strong mesoscale eddies. To date, the impacts of the Indian Ocean monsoon on mesoscale eddies have not been clarified. Here we report on the dipole response of mesoscale edd...
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL109263 |
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| author | Libao Gao Yongcan Zu Guijun Guo Bin Kong Yue Fang Guy D. Williams |
| author_facet | Libao Gao Yongcan Zu Guijun Guo Bin Kong Yue Fang Guy D. Williams |
| author_sort | Libao Gao |
| collection | DOAJ |
| description | Abstract The Southeast Tropical Indian Ocean (SETIO), dominated by the Indian Ocean monsoon, is an important source region for strong mesoscale eddies. To date, the impacts of the Indian Ocean monsoon on mesoscale eddies have not been clarified. Here we report on the dipole response of mesoscale eddy formation to monsoon transition in the SETIO, using satellite and reanalysis data sets. During the summer monsoon season, anticyclonic eddies are mainly concentrated north of 12°S, while cyclonic eddies are south of 12°S. This situation reverses during the winter monsoon season. We attribute this dipole feature to the oceanic perturbations and current shear during the different monsoon periods. A geographical boundary along 12°S aligns with meridional changes in eddy potential energy, which delineates the generation and direction of the newly‐formed eddies. The hot spot region, rich in eddy energy properties, tends to promote eddy formation and endurance during the monsoon periods. |
| format | Article |
| id | doaj-art-64fe8b9e9e6d4eb0a08e3022ca6119b5 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-64fe8b9e9e6d4eb0a08e3022ca6119b52025-08-20T02:04:21ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015113n/an/a10.1029/2024GL109263Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian OceanLibao Gao0Yongcan Zu1Guijun Guo2Bin Kong3Yue Fang4Guy D. Williams5Key Laboratory of Marine Science and Numerical Modeling First Institute of Oceanography Ministry of Natural Resources Qingdao ChinaKey Laboratory of Marine Science and Numerical Modeling First Institute of Oceanography Ministry of Natural Resources Qingdao ChinaKey Laboratory of Marine Science and Numerical Modeling First Institute of Oceanography Ministry of Natural Resources Qingdao ChinaKey Laboratory of Marine Science and Numerical Modeling First Institute of Oceanography Ministry of Natural Resources Qingdao ChinaKey Laboratory of Marine Science and Numerical Modeling First Institute of Oceanography Ministry of Natural Resources Qingdao ChinaKey Laboratory of Marine Science and Numerical Modeling First Institute of Oceanography Ministry of Natural Resources Qingdao ChinaAbstract The Southeast Tropical Indian Ocean (SETIO), dominated by the Indian Ocean monsoon, is an important source region for strong mesoscale eddies. To date, the impacts of the Indian Ocean monsoon on mesoscale eddies have not been clarified. Here we report on the dipole response of mesoscale eddy formation to monsoon transition in the SETIO, using satellite and reanalysis data sets. During the summer monsoon season, anticyclonic eddies are mainly concentrated north of 12°S, while cyclonic eddies are south of 12°S. This situation reverses during the winter monsoon season. We attribute this dipole feature to the oceanic perturbations and current shear during the different monsoon periods. A geographical boundary along 12°S aligns with meridional changes in eddy potential energy, which delineates the generation and direction of the newly‐formed eddies. The hot spot region, rich in eddy energy properties, tends to promote eddy formation and endurance during the monsoon periods.https://doi.org/10.1029/2024GL109263mesoscale eddy formationIndian Ocean monsoondipole responsecyclonic eddiesanticyclonic eddies |
| spellingShingle | Libao Gao Yongcan Zu Guijun Guo Bin Kong Yue Fang Guy D. Williams Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean Geophysical Research Letters mesoscale eddy formation Indian Ocean monsoon dipole response cyclonic eddies anticyclonic eddies |
| title | Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean |
| title_full | Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean |
| title_fullStr | Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean |
| title_full_unstemmed | Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean |
| title_short | Dipole Response of Mesoscale Eddy Formation to Monsoon Transition in the Southeast Tropical Indian Ocean |
| title_sort | dipole response of mesoscale eddy formation to monsoon transition in the southeast tropical indian ocean |
| topic | mesoscale eddy formation Indian Ocean monsoon dipole response cyclonic eddies anticyclonic eddies |
| url | https://doi.org/10.1029/2024GL109263 |
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