| 摘要: |
| 风通过影响海洋表面从而产生200 Hz以上的深海环境噪声，但有研究指出，通过风生表面波之间的非线性相互作用产生的驻波，能够与海床共振构成海底微震，从而产生10 Hz以下的噪声。针对这一新型风生噪声机制，本研究对威克岛海域10 Hz以下的极低频噪声进行了分析。比较了不同频率下海洋环境噪声功率谱级与风速的相关性，并讨论了风速和风向对设立在威克岛南北部二组水听器三联体信号的影响，结果表明2 Hz处的海洋环境噪声级与风速相关性最好，而风速和风向变化越剧烈海洋环境极低频噪声与风速风向的相关性越好。 |
| 关键词: 海洋水文学 极低频 风生噪声 威克岛 |
| DOI：10.3969/J.ISSN.2095-4972.2023.02.009 |
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| 基金项目:国家自然科学基金(42076236) |
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| Study about the correlation of very low frequency ocean noise with wind |
| HUANG Haonan,YANG Yanming,RUAN Hailin,WENG Jinbao |
| (Third Institute of Oceanography, MNR, Xiamen 361005, China) |
| Abstract: |
| It was recognised that the wind usually affects the ocean surface produces deep ocean ambient noise higher than 200 Hz. However, some studies showed that standing waves generated by wind causing ocean surface wave interactions nonlinearly. It can resonate with the sea floor to form seafloor microseisms, resulting in noise below 10 Hz. at this paper, very low frequency noise below 10 Hz at Wake Island is studied for this new wind noise mechanism. The marine environments under different frequency noise spectrum correlation with wind speed, the influence of wind speed and wind direction on the signal of the second group of hydrophone triplet set up at the south and north of Wake Island were compared. Results showed that the ocean ambient noise level had the best correlation with the wind speed at 2 Hz, and the change of wind speed and direction showed a better affection on the spectrum density of ocean ambient at very low frequency noise. Finally, the fitting curve of the hydrophone triplet 2 Hz ocean ambient noise level and wind speed is given, and the crosscorrelation coefficients of the fitting curves are all higher than 0.99. |
| Key words: marine hydrology very low frequency wind-generated noise Wake Island |
