期刊
JOURNAL OF PHYSICAL OCEANOGRAPHY
卷 42, 期 10, 页码 1729-1740出版社
AMER METEOROLOGICAL SOC
DOI: 10.1175/JPO-D-11-0238.1
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资金
- Deutsche Forschungsgemeinschaft
- Sonderforschungsbereich 754
- German Federal Ministry of Education and Research
The equatorial deep jets (EDJ) are a striking feature of the equatorial ocean circulation. In the Atlantic Ocean, the EDJ are associated with a vertical scale of between 300 and 700 m, a time scale of roughly 4.5 years, and upward energy propagation to the surface. It has been found that the meridional width of the EDJ is roughly 1.5 times larger than expected based on their vertical scale. Here, the authors use a shallow-water model for a high-order baroclinic vertical normal mode to argue that mixing of momentum along isopycnals can explain the enhanced width. A lateral eddy viscosity of 300 m(2) s(-1) is found to be sufficient to account for the width implied by observations.
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