globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2013806117
论文题名:
The origin of secondary microseism Love waves
作者: Gualtieri L.; Bachmann E.; Simons F.J.; Tromp J.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:47
起始页码: 29504
结束页码: 29511
语种: 英语
英文关键词: Computational seismology ; Love waves ; Ocean-solid Earth interaction ; Seismic ambient noise
Scopus关键词: article ; computer simulation ; human ; human experiment ; noise ; sea ; tomography
英文摘要: The interaction of ocean surface waves produces pressure fluctuations at the seafloor capable of generating seismic waves in the solid Earth. The accepted mechanism satisfactorily explains secondary microseisms of the Rayleigh type, but it does not justify the presence of transversely polarized Love waves, nevertheless widely observed. An explanation for two-thirds of the worldwide ambient wave field has been wanting for over a century. Using numerical simulations of global-scale seismic wave propagation at unprecedented high frequency, here we explain the origin of secondary microseism Love waves. A small fraction of those is generated by boundary force-splitting at bathymetric inclines, but the majority is generated by the interaction of the seismic wave field with three-dimensional heterogeneity within the Earth.We present evidence for an ergodic model that explains observed seismic wave partitioning, a requirement for full-wave field ambient-noise tomography to account for realistic source distributions. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163936
Appears in Collections:气候变化与战略

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作者单位: Gualtieri, L., Department of Geophysics, Stanford University, Stanford, CA 94305-2215, United States; Bachmann, E., Department of Geosciences, Princeton University, Princeton, NJ 08544, United States; Simons, F.J., Department of Geosciences, Princeton University, Princeton, NJ 08544, United States; Tromp, J., Department of Geosciences, Princeton University, Princeton, NJ 08544, United States, Program in Applied & Computational Mathematics, Princeton University, Princeton, NJ 08544, United States

Recommended Citation:
Gualtieri L.,Bachmann E.,Simons F.J.,et al. The origin of secondary microseism Love waves[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(47)
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