A number of studies have indicated that non-stationarity of the wind field over the sea significantly disrupts the equilibrium between the wind, stress, and wave fields. However, no studies have systematically examined the impact of non-stationarity using a large dataset. Here, we examine the effect of non-stationarity of the wind field on the stress by analyzing six years of turbulent flux data from the Östergarnsholm site. On average, the impact of the non-stationarity on the stress and drag coefficient becomes important for wind speeds less than about 6 m s $$^{-1}$$ - 1 . Differences between the acceleration and deceleration stages are revealed by phase shifting the calculation of the non-stationarity with respect to the calculation of the stress and drag coefficient. The time structure of events is examined by selecting samples of large increases and decreases of the wind speed. Analyses needed for further progress are noted.

中文翻译：

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小尺度非平稳风驱动的海面应力

大量研究表明，海上风场的非平稳性显着破坏了风场、应力场和波场之间的平衡。然而，没有研究使用大型数据集系统地检查非平稳性的影响。在这里，我们通过分析来自 Östergarnsholm 站点的六年湍流数据来检查风场的非平稳性对应力的影响。平均而言，对于小于约 6 m s $$^{-1}$$ - 1 的风速，非平稳性对应力和阻力系数的影响变得重要。通过相对于应力和阻力系数计算的非平稳性计算的相移来揭示加速和减速阶段之间的差异。通过选择风速大幅增加和减少的样本来检查事件的时间结构。记录了进一步进展所需的分析。