Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport
Abstract Oceanic eddy‐induced salt transport is highly important for the global water cycle and climate change. Previous studies have focused on single horizontal eddy‐induced transport effect or regional studies, yet assessments of the impact of stirring and trapping effects on salt transport at th...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Earth's Future |
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| Online Access: | https://doi.org/10.1029/2024EF005330 |
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| author | Yikai Yang Lili Zeng Qiang Wang Rui Shi Peng Xiu |
| author_facet | Yikai Yang Lili Zeng Qiang Wang Rui Shi Peng Xiu |
| author_sort | Yikai Yang |
| collection | DOAJ |
| description | Abstract Oceanic eddy‐induced salt transport is highly important for the global water cycle and climate change. Previous studies have focused on single horizontal eddy‐induced transport effect or regional studies, yet assessments of the impact of stirring and trapping effects on salt transport at the global scale are incomplete. Here, we show that upper ocean salt transport due to eddy stirring and trapping effects displays a strong zonal dependence on the global ocean, with the former playing a dominant role over the analysis period. The zonal accumulation of meridional salt transport reaches a maximum of −4.52 psu·Sv (×106 psu·m3·s−1) in the Southern Ocean. Equivalent freshwater transport is poleward in the near‐equator region and equatorward in the near‐polar region, consequently causing freshwater to converge in the middle of the subtropical gyre. The divergence of salt transport further suggests that eddies transport salt out of the maximum sea surface salinity regions. Strong seasonal variations in salt transport occur mainly in eddy‐enriched regions such as the western boundary currents and the Southern Ocean. The relative contribution of eddy stirring and trapping effects to oceanic meridional salt transport can reach approximately 23.6%. These results highlight the importance of eddy effects in the global oceanic salt budget. |
| format | Article |
| id | doaj-art-b4cfcdb9fc414e9d90652179665e2dab |
| institution | Kabale University |
| issn | 2328-4277 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Earth's Future |
| spelling | doaj-art-b4cfcdb9fc414e9d90652179665e2dab2025-08-20T03:58:40ZengWileyEarth's Future2328-42772025-07-01137n/an/a10.1029/2024EF005330Imprints of Eddy Stirring and Trapping Effects on Global Salt TransportYikai Yang0Lili Zeng1Qiang Wang2Rui Shi3Peng Xiu4State Key Laboratory of Tropical Oceanography (LTO) South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaState Key Laboratory of Tropical Oceanography (LTO) South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaState Key Laboratory of Tropical Oceanography (LTO) South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaState Key Laboratory of Tropical Oceanography (LTO) South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaState Key Laboratory of Marine Environmental Science College of Ocean and Earth Sciences Xiamen University Xiamen ChinaAbstract Oceanic eddy‐induced salt transport is highly important for the global water cycle and climate change. Previous studies have focused on single horizontal eddy‐induced transport effect or regional studies, yet assessments of the impact of stirring and trapping effects on salt transport at the global scale are incomplete. Here, we show that upper ocean salt transport due to eddy stirring and trapping effects displays a strong zonal dependence on the global ocean, with the former playing a dominant role over the analysis period. The zonal accumulation of meridional salt transport reaches a maximum of −4.52 psu·Sv (×106 psu·m3·s−1) in the Southern Ocean. Equivalent freshwater transport is poleward in the near‐equator region and equatorward in the near‐polar region, consequently causing freshwater to converge in the middle of the subtropical gyre. The divergence of salt transport further suggests that eddies transport salt out of the maximum sea surface salinity regions. Strong seasonal variations in salt transport occur mainly in eddy‐enriched regions such as the western boundary currents and the Southern Ocean. The relative contribution of eddy stirring and trapping effects to oceanic meridional salt transport can reach approximately 23.6%. These results highlight the importance of eddy effects in the global oceanic salt budget.https://doi.org/10.1029/2024EF005330eddy‐induced transportsea surface salinityeddy effectssalt budget |
| spellingShingle | Yikai Yang Lili Zeng Qiang Wang Rui Shi Peng Xiu Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport Earth's Future eddy‐induced transport sea surface salinity eddy effects salt budget |
| title | Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport |
| title_full | Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport |
| title_fullStr | Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport |
| title_full_unstemmed | Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport |
| title_short | Imprints of Eddy Stirring and Trapping Effects on Global Salt Transport |
| title_sort | imprints of eddy stirring and trapping effects on global salt transport |
| topic | eddy‐induced transport sea surface salinity eddy effects salt budget |
| url | https://doi.org/10.1029/2024EF005330 |
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