Overturning circulation driven by breaking internal waves in the deep ocean
Overturning circulation driven by breaking internal waves in the deep ocean
复制标题
DOI：
10.1002/grl.50542
复制
发表时间：
2013-06
影响因子：
5.2
通讯作者：
M. Nikurashin;R. Ferrari
中科院分区：
文献类型：
--
作者：
M. Nikurashin;R. Ferrari
对深海中由内波驱动的混合引起的水质量转换进行了全球估计。该估计是基于潮汐和地转运动转化为内波的能量，并结合湍流混合参数化。研究表明，深海内波驱动的混合可以维持20-30 Sv的水质量转换。这种变化的三分之一或更多是由地转运动产生的背风波造成的，这些运动主要发生在南大洋。虽然由于许多假设、约束条件差的参数和计算中的数据噪声，这些结果是不确定的，但背风波驱动的混合在深海环流中起重要作用的结果可能是可靠的。这意味着背风波驱动的混合应该在海洋和气候模式中表现出来，但目前还没有。
A global estimate of the water‐mass transformation by internal wave‐driven mixing in the deep ocean is presented. The estimate is based on the energy conversion from tidal and geostrophic motions into internal waves combined with a turbulent mixing parameterization. We show that internal wave‐driven mixing in the deep ocean can sustain 20–30 Sv of water‐mass transformation. One third or more of this transformation is attributed to lee waves generated by geostrophic motions flowing over rough topography, primarily in the Southern Ocean. While these results are uncertain due to many assumptions, poorly constrained parameters and data noise that enter in the calculation, the result that lee wave‐driven mixing plays an important role in the abyssal ocean circulation is likely robust. The implication is that lee wave‐driven mixing should be represented in ocean and climate models, but currently it is not.