Response of wind stress and surface wave to the gusts under swell and wind-wave conditions

IF 2.2 3区 地球科学 Q2 OCEANOGRAPHY Ocean Dynamics Pub Date : 2024-07-04 DOI:10.1007/s10236-024-01623-w
Jing Ren, Sheng Chen, Xunqiang Yin, Yuhuan Xue, Yongqing Yu, Zhanli Wang, Fangli Qiao
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Abstract

Wind gusts play an important role in the modulation of wind stress and have remarkable influence on surface waves. The response of wind stress and surface wave to wind gusts is investigated under wind-wave and swell dominated conditions through direct flux measurements on two coastal towers in the Bohai Sea and South China Sea. Observations show that wind stress significantly increases under gusty conditions compared to non-gusty conditions whether dominated by wind-waves or swells. The stronger the gusts, the greater the increase in wind stress. However, surface waves show different responses to the gusts under wind-wave and swell dominated conditions. When wind-waves dominate, the stronger the gust, the higher the significant wave height, while when swells dominate, the relatively lower the significant wave height. The separation of wind-wave and swell spectra indicates gusts can increase the wind-wave energy and decrease the swell energy. The weakening of swell and the strengthening of wind-wave may lead to an increase in wind stress.

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涌浪和风浪条件下风应力和表面波对阵风的响应
阵风在风应力调制中起着重要作用,并对面波有显著影响。通过对渤海和南海两个沿岸塔的直接通量测量,研究了风浪主导条件下风应力和面波对阵风的响应。观测结果表明,与非阵风条件相比,无论是风浪主导还是涌浪主导,阵风条件下的风应力都会显著增加。阵风越强,风应力增加越大。不过,在风浪和涌浪主导的条件下,表面波对阵风的反应有所不同。当风浪主导时,阵风越强,显著波高越高,而当涌浪主导时,显著波高相对较低。风浪和涌浪频谱的分离表明阵风可以增加风浪能量,减少涌浪能量。涌浪的减弱和风浪的增强可能会导致风应力的增加。
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来源期刊
Ocean Dynamics
Ocean Dynamics 地学-海洋学
CiteScore
5.40
自引率
0.00%
发文量
37
审稿时长
6-12 weeks
期刊介绍: Ocean Dynamics is an international journal that aims to publish high-quality peer-reviewed articles in the following areas of research: Theoretical oceanography (new theoretical concepts that further system understanding with a strong view to applicability for operational or monitoring purposes); Computational oceanography (all aspects of ocean modeling and data analysis); Observational oceanography (new techniques or systematic approaches in measuring oceanic variables, including all aspects of monitoring the state of the ocean); Articles with an interdisciplinary character that encompass research in the fields of biological, chemical and physical oceanography are especially encouraged.
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