Garabato Alberto C Naveira, Polzin Kurt L, King Brian A, Heywood Karen J, Visbeck Martin
School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK.
Science. 2004 Jan 9;303(5655):210-3. doi: 10.1126/science.1090929.
Observations of internal wave velocity fluctuations show that enhanced turbulent mixing over rough topography in the Southern Ocean is remarkably intense and widespread. Mixing rates exceeding background values by a factor of 10 to 1000 are common above complex bathymetry over a distance of 2000 to 3000 kilometers at depths greater than 500 to 1000 meters. This suggests that turbulent mixing in the Southern Ocean may contribute crucially to driving the upward transport of water closing the ocean's meridional overturning circulation, and thus needs to be represented in numerical simulations of the global ocean circulation and the spreading of biogeochemical tracers.
对内波速度波动的观测表明，南大洋粗糙地形上增强的湍流混合非常强烈且广泛。在深度大于500至1000米的情况下，在2000至3000公里的复杂测深区域之上，混合率超过背景值10到1000倍是很常见的。这表明南大洋的湍流混合可能对推动海洋经向翻转环流的向上水体输送起着至关重要的作用，因此在全球海洋环流和生物地球化学示踪剂扩散的数值模拟中需要加以体现。
