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The Characteristics of Microseisms in South China Sea: Results From a Combined Data Set of OBSs, Broadband Land Seismic Stations, and a Global Wave Height Model
Xiao, H; Xue, M; Yang, T; Liu, CG; Hua, QF; Xia, SH; Huang, HB; Le, BM; Yu, YQ; Huo, D; Pan, MH; Li, L; Gao, JY; meixue@tongji.edu.cn
2018
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
卷号123期号:5页码:3923-3942
摘要It has long been recognized that ocean gravity waves can generate microseisms through their interactions and coupling with the solid earth. Their generation mechanisms, wave types, and propagation have been studied and debated intensively. In this study, we focus on the characteristics of microseisms in South China Sea (SCS) and compare them with globally observed microseisms. We use data from six ocean bottom seismometers, 10 publicly available broadband land seismometers near SCS, and a reanalyzed global wave height model from 1 May 2012 to 20 August 2012 (UTC), the time span of ocean bottom seismometers' data. We apply three techniques including power spectral density, correlation, and frequency dependent polarization analysis. Our results show that (1) microseisms observed in SCS are dominated by sources from adjacent oceans, instead of the common global sources from the Pacific, Atlantic, or Indian Ocean; (2) the split of double-frequency microseisms (DFMs) is observed in SCS, especially on land stations: the sources are located near the central sea basin for long-period DFMs (0.1-0.25Hz) and are local near stations for short-period DFMs (0.25-0.5Hz); (3) typhoons both strengthen microseisms and affect the source locations of microseisms with the biggest influence on the short-period DFMs; and (4) microseisms in or near SCS are a mixture of Love and Rayleigh waves and the relative dominance of Love and Rayleigh waves changes with locations.
部门归属[Xiao, Han; Xue, Mei; Yang, Ting; Le, Ba Manh; Yu, Youqiang; Huo, Da; Pan, Mohan; Li, Lin] Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China; [Yang, Ting] Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China; [Liu, Chenguang; Hua, Qingfeng] State Ocean Adm, Inst Oceanog 1, Qingdao, Peoples R China; [Xia, Shaohong; Huang, Haibo] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China; [Gao, Jinyao] State Ocean Adm, Inst Oceanog 2, Hangzhou, Zhejiang, Peoples R China
学科领域Geochemistry & Geophysics
关键词[WOS]microseisms ; typhoon ; source region ; wave types ; South China Sea (SCS)
资助项目MSG
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17136
专题中科院边缘海地质重点实验室
通讯作者meixue@tongji.edu.cn
推荐引用方式
GB/T 7714
Xiao, H,Xue, M,Yang, T,et al. The Characteristics of Microseisms in South China Sea: Results From a Combined Data Set of OBSs, Broadband Land Seismic Stations, and a Global Wave Height Model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(5):3923-3942.
APA Xiao, H.,Xue, M.,Yang, T.,Liu, CG.,Hua, QF.,...&meixue@tongji.edu.cn.(2018).The Characteristics of Microseisms in South China Sea: Results From a Combined Data Set of OBSs, Broadband Land Seismic Stations, and a Global Wave Height Model.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(5),3923-3942.
MLA Xiao, H,et al."The Characteristics of Microseisms in South China Sea: Results From a Combined Data Set of OBSs, Broadband Land Seismic Stations, and a Global Wave Height Model".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.5(2018):3923-3942.
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