Turbulent Airflow and Wave-Induced Stress Over the Ocean
Turbulent Airflow and Wave-Induced Stress Over the Ocean
复制标题
海洋上的湍流气流和波浪引起的应力
DOI：
10.1007/s10546-018-0359-1
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发表时间：
2018
影响因子：
4.3
通讯作者：
H.C. Graber
中科院分区：
文献类型：
--
作者：
Tamura;H.;W.M. Drennan;C.O. Collins III;H.C. Graber
我们研究了海洋波浪上方湍流气流的结构。基于分析的风和波浪观测来自系泊和浮动的气-海相互作用Spar浮标在浅水波实验现场活动，我们表明，共同谱的动量通量的风-海条件下遵循既定的通用标度律。在涌浪占主导地位的条件下，波边界层的扩展和通用的共谱标度分解，如前所述。另一方面，使用峰值波频率来再现普遍的共谱成功地解释了湍流场的结构。我们量化的气流的波相干分量，这澄清了海浪如何影响通过波浪边界层的动量传递。事实上，估计的波浪引起的应力膨胀占主导地位的条件解释了异常的共谱形状附近的峰值波频率。
We examine the structure of turbulent airflow over ocean waves. Based on an analysis of wind and wave observations derived from a moored and floating Air–Sea Interaction Spar buoy during the Shoaling Waves Experiment field campaign, we show that the cospectra of momentum flux for wind–sea conditions follow established universal scaling laws. Under swell-dominant conditions, the wave boundary layer is extended and the universal cospectral scaling breaks down, as demonstrated previously. On the other hand, the use of peak wave frequency to reproduce the universal cospectra successfully explains the structure of the turbulent flow field. We quantify the wave-coherent component of the airflow and this clarifies how ocean waves affect momentum transfer through the wave boundary layer. In fact, the estimated wave-induced stresses for swell-dominant conditions explain the anomalous cospectral shapes observed near the peak wave frequency.