| Han Xiao,Yin Jingwei,Yang Yanming,Wen Hongtao,Guo Longxiang. 2020. Under-ice ambient noise in the Arctic Ocean: observations at the long-term ice station. Acta Oceanologica Sinica, 39(9):125－132 |
| Under-ice ambient noise in the Arctic Ocean: observations at the long-term ice station |
| 北冰洋冰下环境噪声：长期冰站观测结果 |
| Received:December 14, 2019 |
| DOI：10.1007/s13131-020-1652-7 |
| Key words:long-term ice station under-ice ambient noise time-frequency analysis power spectral density variations meteorological variables |
| 中文关键词: 长期冰站 冰下环境噪声 时频分析 功率谱密度变化 气象参数 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 61631008, 61901136 and 51779061; the National Key Research and Development Program of China under contract No. 2018YFC1405904; the Fok Ying-Tong Education Foundation under contract No. 151007; the Opening Funding of Science and Technology on Sonar Laboratory under contract No. 6142109KF201802; the Innovation Special Zone of National Defense Science and Technology. |
| Author Name | Affiliation | E-mail | | Han Xiao | Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China | | | Yin Jingwei | Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China | yinjingwei@hrbeu.edu.cn | | Yang Yanming | Laboratory of Ocean Acoustic and Remote Sensing, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | Wen Hongtao | Laboratory of Ocean Acoustic and Remote Sensing, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China | | | Guo Longxiang | Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China | |
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| Abstract: |
| Under-ice ambient noise in the Arctic Ocean is studied using the data recorded by autonomous hydrophones at the long-term ice station during the 9th Chinese National Arctic Research Expedition. Time-frequency analysis of two 7-s-long ice-induced noise samples shows that both ice collision and ice breaking noise have many outliers in the time-domain (impulsive characteristic) and abundant frequency components in the frequency-domain. Ice collision noise lasts for several seconds while the duration of ice breaking noise is much shorter (i.e., less than tens of milliseconds). Gaussian distribution and symmetric alpha stable (sαs) distribution are used in this paper to fit the impulsive under-ice noise. The sαs distribution can achieve better performance as it can track the heavy tails of impulsive noise while Gaussian distribution fails. This paper also analyzes the meteorological variables during the under-ice noise observation experiment and deduces that the impulsive ambient noise was caused by the combined force of high wind speed and increasing atmosphere temperature on the ice canopy. The Pearson correlation coefficients between long-term power spectral density variations of under-ice ambient noise and meteorological variables are also studied in this paper. |
| 中文摘要: |
| 本文利用中国第9次北极科学考察长期冰站自容水听器记录的数据对北冰洋冰下环境噪声进行了研究。通过对两段7秒长的冰层引起的噪声的时频分析表明：无论是冰层碰撞噪声还是冰层破裂噪声在时域都存在大量的峰值点（呈现脉冲特性），在频域都存在丰富的频率分量。冰层碰撞噪声可以持续数秒，而冰层破裂噪声的持续时间要短得多（小于几十毫秒）。本文采用高斯分布和对称alpha稳态分布来拟合冰下脉冲噪声。对称alpha稳态分布可以跟踪脉冲噪声的重尾，从而获得更好的性能，而高斯分布则效果不佳。本文还分析了冰下环境噪声观测试验期间采集到的气象参数，推断出冰下脉冲噪声是由较高的风速和升高的大气温度共同作用于冰层造成的。本文还研究了冰下环境噪声长期的功率谱密度变化与气象参数之间的皮尔逊相关系数。 |
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