| 低风速涌浪条件下浪致应力的研究 |
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| 引用本文： | 潘伟,邹仲水,宋金宝,黄健.低风速涌浪条件下浪致应力的研究[J].海洋学报,2021,43(10):1-9. |
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| 作者姓名： | 潘伟 邹仲水 宋金宝 黄健 |
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| 作者单位： | 1.浙江大学 物理海洋研究所，浙江 舟山 316021 |
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| 基金项目： | 国家自然科学基金项目（41830533，41806028）；中国博士后科学基金（2019M65206） |
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| 摘 要： | 本文基于2012年2月15日至5月8日的广东省茂名市附近海上铁塔实测数据，分析了海气边界层的湍流运动。结果证实，在涌浪条件下，协谱和Ogive曲线存在明显受涌浪影响的区域。本文进一步研究，发现浪致雷诺应力的正负符号变化与波龄相关，并给出了顺风向和侧风向浪致雷诺应力正负符号反转时波龄的统计分布。此外，本文基于协谱法提取了浪致雷诺应力τswell，并与传统方法得到的浪致雷诺应力τ*swell做比较。结果表明，整体上τswell比τ*swell大2～3个量级，这意味着传统方法显著低估了涌浪的浪致雷诺应力，传统的浪致雷诺应力计算方法还有待改进。
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| 关 键 词： | 涌浪 浪致雷诺应力 协谱 Ogive曲线 |
| 收稿时间： | 2020-08-12 |
Studies of wave-induced stresses under swell-dominated low wind speed condition |
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| Institution: | 1.Institute of Physical Oceanography, Zhejiang University, Zhoushan 316021, China2.Guangzhou Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510640, China |
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| Abstract: | Data measured by ultrasonic anemometer moored at a fixed platform near Maoming City, Guangdong Province from February 15 to May 8, 2012 has been used to analyze turbulence within wave boundary layer. The results confirmed that under swell conditions, there are areas obviously affected by swell in the cospectrum and Ogive curves. Furthermore, the sign change of wave-induced Reynolds stress is related to wave age. This paper presents the statistical distribution of the sign reversal of the Reynolds stress caused by the waves in the along-wind and cross-wind directions with wave age. In addition, this paper extracts the wave-induced Reynolds stress τswell based on cospectrum method, and compares it with the wave-induced Reynolds stress τ*swell calculated by traditional method. The results show that the value of τswell is 2?3 orders of magnitude larger than that of τ*swell, which indicates that the traditional method significantly underestimates the wave-induced Reynolds stress, and the traditional method needs to be improved. |
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