海洋地质与第四纪地质2026，Vol.46Issue(1)：87-98,12.DOI:10.16562/j.cnki.0256-1492.2025022601
楚科奇海-阿拉斯加内陆地区环境地震噪声差异研究
Ambient seismic noise difference between Chukchi Sea and Interior Alaska
摘要
Abstract
Based on the background of receding Arctic sea ice and increasing exploration activities offshore Alaska,we explored the sea-land differences in seismic noise characteristics between the Chukchi Sea and the inland of Alaska,for which the Chukchi Sea OBS data obtained from the Ninth Arctic Scientific Expedition and the continuous waveform data from Alaska seismic stations were used,the temporal and frequency distribution characteristics of the noise were analyzed using the power spectral density and probability density function methods,and the sources of the noise were identified and described from the information on sea-ice density,ocean waves,river flow,and human activities.Result shows that in the microseismic zone,the ambient seismic noise intensity in the Chukchi Sea varies significantly between ice and ice-free periods:sea ice cover suppressed the dual-frequency microseismic energy,whereas the enhanced wave activity in the ice-free period significantly increased the microseismic noise.Seasonal variations in double-frequency microseismic peaks were revealed in the inland Alaskan stations and correlated with distant-source Arctic Ocean storms,showing a slight shortening of the peak period in summer and autumn.On the short-period scale,the Chukchi Sea OBS(Ocean Bottom Seismometer)records intermittent high-energy noise from wave-ice-floe collisions,while the inland stations are susceptible to a combination of river turbulence and human activities,and show clear seasonal and diurnal variation patterns.The higher ambient seismic noise intensity in the Chukchi Sea over a long period is related to submarine currents,whereas that in the inland stations is generally low and stable.关键词
环境地震噪声/影响因素/楚科奇海/阿拉斯加Key words
ambient seismic noise/impact factors/Chukchi Sea/Alaska分类
海洋科学引用本文复制引用
朱晓川,邢磊,李倩倩,张洪茂..楚科奇海-阿拉斯加内陆地区环境地震噪声差异研究[J].海洋地质与第四纪地质,2026,46(1):87-98,12.基金项目
中央高校基本科研业务费"地震海洋学"(202442002) （202442002）
山东省自然科学基金面上项目"同步挤压小波变换与二维离散小波变换联合压制面波方法研究"(ZR2022MD067) （ZR2022MD067）
泰山学者青年专家项目(tsqn202408068) （tsqn202408068）
海底科学与探测技术教育部重点实验室开放课题基金(SGPT-20220F-02) （SGPT-20220F-02）
