Revised Estimates of Ocean Surface Drag in Strong Winds
Revised Estimates of Ocean Surface Drag in Strong Winds
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DOI：
10.1029/2020gl087647
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
M. Curcic;B. Haus
中科院分区：
文献类型：
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作者：
M. Curcic;B. Haus
海气阻力控制着大气和海洋之间的动量转移，这在飓风中仍然是未知的。我们在实验室中重新讨论了动量预算和涡流相关方差方法来估计表面阻力系数。我们的阻力估计与低至中等风速下的现场测量结果和先前在飓风强度下的实验室测量结果一致。阻力系数在2.6×10−3和U10≈25 m s−1处达到饱和，与Takagaki等人（2012,）先前的实验室结果一致。在我们的分析过程中，我们发现Donelan等人（2004）使用的原始源代码中存在错误。我们给出了修正后的数据，并描述了修正过程。虽然对数据的修正没有改变强风中阻力饱和的关键发现，但其大小和风速阈值发生了显著变化。我们的研究结果强调了基于现场和实验室数据更新和统一的阻力参数化的必要性。
Air‐sea drag governs the momentum transfer between the atmosphere and the ocean and remains largely unknown in hurricane winds. We revisit the momentum budget and eddy covariance methods to estimate the surface drag coefficient in the laboratory. Our drag estimates agree with field measurements in low‐to‐moderate winds and previous laboratory measurements in hurricane‐force winds. The drag coefficient saturates at 2.6×10−3 and U10≈25 m s−1, in agreement with previous laboratory results by Takagaki et al. (2012,). During our analysis, we discovered an error in the original source code used by Donelan et al. (2004,). We present the corrected data and describe the correction procedure. Although the correction to the data does not change the key finding of drag saturation in strong winds, its magnitude and wind speed threshold are significantly changed. Our findings emphasize the need for an updated and unified drag parameterization based on field and laboratory data.