Under-ice ambient noise in the Arctic Ocean: observations at the long-term ice station  

作　　者：Xiao Han Jingwei Yin Yanming Yang Hongtao Wen Longxiang Guo 

机构地区：[1]Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China [2]Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China [3]College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China [4]Laboratory of Ocean Acoustic and Remote Sensing,Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China

出　　处：《Acta Oceanologica Sinica》2020年第9期125-132,共8页海洋学报（英文版）

基　　金：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.

摘　　要：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.

关 键 词：long-term ice station under-ice ambient noise time-frequency analysis power spectral density variations meteorological variables 

分 类 号：P714[天文地球—海洋科学] P731.15