摘要详情
941 / 2024-09-19 21:00:54
Contribution of Agulhas Leakage to the “Saltier Atlantic-Fresher Indian” Trend
Agulhas Leakage; salinity trend; south Indian Ocean; south Atlantic Ocean
摘要待审
With the global warming, surface salinity increases (decreases) in evaporation (precipitation) dominated regions, the Atlantic–Indian salinity contrast increases, and the upper thermocline salinity maximum increases while the salinity minimum of intermediate waters decreases. The greater Agulhas system around southern Africa forms a key component of the global ocean circulation. This system feeds the upper arm of the Atlantic meridional overturning circulation (AMOC) through the leakage of warm, saline waters from the Indian Ocean to the Atlantic. Over longer periods, theory suggests its variability is associated with the large-scale wind field, in particular with the position of the maximum Southern Hemisphere westerly winds. These winds are related to the latitude of the oceanic subtropical front (STF), which separates the subtropical gyre from the Antarctic Circumpolar Current. In essence, if the westerlies shift southwards, as recent data suggest in a warming climate, then the oceanic ‘gateway’ between the African continent and the STF expands and leakage from the Indian Ocean to the Atlantic changes. Then the salt flux between the Atlantic and Indian Oceans changes. How does Agulhas leakage contribute to the “Saltier Atlantic-Fresher Indian” trend?
重要日期
-
会议日期
01月14日
2025
至01月17日
2025
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09月27日 2024
初稿截稿日期
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12月14日 2024
注册截止日期
主办单位
State Key Laboratory of Marine Environmental Science, Xiamen University
联系方式
- JKejing GU
- xm******@xmu.edu.cn
- +86*********
