Sea‐state‐dependent wind work on the oceanic general circulation
Sea‐state‐dependent wind work on the oceanic general circulation
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DOI：
10.1002/grl.50624
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发表时间：
2013-06
影响因子：
5.2
通讯作者：
Guoqiang Liu;W. Perrie
中科院分区：
文献类型：
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作者：
Guoqiang Liu;W. Perrie
我们利用波浪后发数据集、QuikSCAT风以及来自(1)AVISO和(2)ECCO2模式产品的地转和总海面流，研究了海况对海洋环流的影响。对于由AVISO或ECCO2估算的地表地转流的风功，与排除海况影响的估计相比，海况相关的风应力平均增加24% （0.17TW）或23% （0.15TW）。对于总表面流的风功，依赖于海况的风应力使风功增加了约24% （0.4TW）。在空间分布上，风力输入的增加主要发生在热带大风区和中纬度风暴路径区，如南极环极流区，那里的海面相对粗糙，以年轻波和大风为特征。相比之下，在一些风力相对较低和海浪成熟的地区，估计的风力输入略有减少。
We examine sea‐state‐dependent wind work on the oceanic general circulation, using a wave hindcast dataset, QuikSCAT winds, and geostrophic and total ocean surface currents from (1) AVISO and (2) ECCO2 model products. For wind work on surface geostrophic currents estimated from AVISO or ECCO2, sea‐state‐dependent wind stress increases an average of 24% (0.17TW) or 23% (0.15TW), compared with estimates that exclude sea state effects. For wind work on the total surface currents, the sea‐state‐dependent wind stress increases the wind work by about 24% (0.4TW). In terms of spatial distribution, the increase in wind power input occurs mainly in high‐wind tropical regions and the mid‐latitude storm track regions, like the Antarctic Circumpolar Current region, where the relatively rough ocean surface is characterized by young waves and high winds. By comparison, in some regions with relatively low winds and mature ocean waves, there is a slight reduction in estimated wind power input.