王金成, 潘海东, 王冠琳, 等, 2024. 基于水下滑翔机观测的印度洋东南海域环境噪声风关特性[J]. 海洋科学进展, 42(1): 160-169. doi: 10.12362/j.issn.1671-6647.20220906002.
引用本文: 王金成, 潘海东, 王冠琳, 等, 2024. 基于水下滑翔机观测的印度洋东南海域环境噪声风关特性[J]. 海洋科学进展, 42(1): 160-169. doi: 10.12362/j.issn.1671-6647.20220906002.
WANG J C, PAN H D, WANG G L, et al, 2024. Wind-generated characteristics of ambient noise in southeastern Indian Ocean based on underwater glider observation[J]. Advances in Marine Science, 42(1): 160-169. doi: 10.12362/j.issn.1671-6647.20220906002
Citation: WANG J C, PAN H D, WANG G L, et al, 2024. Wind-generated characteristics of ambient noise in southeastern Indian Ocean based on underwater glider observation[J]. Advances in Marine Science, 42(1): 160-169. doi: 10.12362/j.issn.1671-6647.20220906002

基于水下滑翔机观测的印度洋东南海域环境噪声风关特性

Wind-Generated Characteristics of Ambient Noise in Southeastern Indian Ocean Based on Underwater Glider Observation

  • 摘要: 基于“海燕”水下滑翔机在印度洋东南海域实测的环境噪声数据和海面风速再分析数据:分析了此海域4~20 kHz内环境噪声时频特性;验证了滑翔机深度不会显著影响环境噪声的风关特性测量;定量计算了噪声谱级与海面风速的相关系数;利用最小二乘拟合得到各中心频率噪声谱级与风速的线性函数关系。结果表明:在小于4 kHz的频段内,因受所搭载温盐深仪CTD(Conductivity, Temperature, Depth)泵的噪声影响,噪声谱级与海面风速的相关系数在0.2以下;在大于4 kHz的频段内,环境噪声谱级与海表面风速变化趋势一致性较好,且在6~10 kHz频段内相关系数为0.8左右;在5~20 kHz频段内,噪声谱级与风速拟合呈线性函数关系,并且随着中心频率增高,倍频程损失平均为5 dB左右;在10 kHz处,拟合斜率最大,噪声谱级对海面风速变化的敏感度最高。

     

    Abstract: Based on the ambient noise data measured by Petrel underwater glider and sea surface wind speed reanalysis data in the southeastern Indian Ocean, the time-frequency characteristics of ambient noise from 4 to 20 kHz in this sea area are analyzed. It is verified that glider depth does not significantly affect the wind-related characteristics of ambient noise; the correlation coefficient between noise spectrum level and wind speed is quantitatively calculated; the linear function relationship between the noise spectrum level of each center frequency and the wind speed is obtained by least square fitting. The results show that: in the frequency band range less than 4 kHz, the correlation coefficient is below 0.2 due to the interference of the conductivity-temperature-depth (CTD) pump noise; in the frequency band greater than 4 kHz, the ambient noise spectrum level has a strong consistency with the variation trend of the sea surface wind speed, and the correlation coefficient is about 0.8 in 6-10 kHz. In the fequency range of 5-20 kHz, the fitting of noise spectrum level and wind speed have a linear function relationship, and as the center frequency increases, the average octaveband loss is about 5 dB; at 10 kHz, the fitting slope is the largest, the noise spectral levels are most sensitive to changes in sea surface wind speed.

     

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