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Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean
Morozov, E.G.; Tarakanov, R.Y.; van Haren, H. (2013). Transport of Antarctic bottom water through the Kane Gap, tropical NE Atlantic Ocean. Ocean Sci. 9: 825-835. http://dx.doi.org/10.5194/os-9-825-2013
In: Ocean Science. Copernicus: Göttingen. ISSN 1812-0784; e-ISSN 1812-0792, meer
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| Auteurs | | Top |
- Morozov, E.G.
- Tarakanov, R.Y.
- van Haren, H., meer
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| Abstract |
We study low-frequency properties of the Antarctic Bottom Water (AABW) flow through the Kane Gap (9° N) in the Atlantic Ocean. The measurements in the Kane Gap include five visits with CTD (Conductivity-Temperature-Depth) sections in 2009–2012 and a year-long record of currents on a mooring using three AquaDopp current meters. We found an alternating regime of flow, which changes direction several times during a year. The seasonal signal seems to dominate. The maximum daily average values of southerly velocities reach 0.20 m s-1, while the greatest north-northwesterly velocity is as high as 0.15 m s-1. The velocity and transport at the bottom are aligned along the slope of a local hill near the southwestern side of the gap. The distribution of velocity directions at the upper boundary of AABW is wider. The transport of AABW (T < 1.9 °C) based on the mooring and LADCP (Lowered Acoustic Doppler Current Profiler) data varies approximately within ±0.35 Sv in the northern and southern directions. The annual mean AABW transport through the Kane Gap is almost zero. |
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