期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 10, 页码 4072-4079出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL064089
关键词
Agulhas rings; coherent material eddies; transport
资金
- CNES
- NSF [CMG0825547]
- NASA [NNX10AE99G, NNX14AI85G]
- NOAA through the Climate Observations and Monitoring Program
- NASA [NNX10AE99G, 133557, 681250, NNX14AI85G] Funding Source: Federal RePORTER
The role of mesoscale eddies in transporting Agulhas leakage is investigated using a recent technique from nonlinear dynamical systems theory applied on geostrophic currents inferred from the over two decade long satellite altimetry record. Eddies are found to acquire material coherence away from the Agulhas retroflection, near the Walvis Ridge in the South Atlantic. Yearly, one to four coherent material eddies are detected with diameters ranging from 40 to 280km. A total of 23 eddy cores of about 50km in diameter and with at least 30% of their contents traceable into the Indian Ocean were found to travel across the subtropical gyre with minor filamentation. Only one eddy core was found to pour its contents on the North Brazil Current. While the ability of eddies to carry Agulhas leakage northwestward across the South Atlantic is supported by our analysis, this is more restricted than suggested by earlier ring transport assessments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据