| DOI: | 10.1002/2014GL060979
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| 论文题名: | Propagation of microseisms from the deep ocean to land |
| 作者: | Ying Y.; Bean C.J.; Bromirski P.D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9797
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| EISSN: | 1944-9528
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| 出版年: | 2014
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| 卷: | 41, 期:18 | | 起始页码: | 6374
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| 结束页码: | 6379
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| 语种: | 英语
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| 英文关键词: | computational seismology
; fluid-solid coupling
; secondary microseism
; wave propagation
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| Scopus关键词: | Acoustic wave propagation
; Computer simulation
; Gravity waves
; Oceanography
; Surface waters
; Wave propagation
; Computational seismologies
; Fluid-solid coupling
; Northeast Atlantic Ocean
; Ocean surface gravity waves
; Pressure fluctuation
; secondary microseism
; Spectral element method
; Structural heterogeneity
; Seismology
; computer simulation
; continental margin
; deep sea
; elastic wave
; gravity wave
; heterogeneity
; numerical model
; pressure effect
; seismic noise
; seismic wave
; seismology
; upper crust
; vibration
; water column
; wave generation
; wave propagation
; Atlantic Ocean
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| 英文摘要: | Ocean-generated microseisms are faint Earth vibrations that result from pressure fluctuations at the sea floor generated by the interaction between ocean surface gravity waves, and are continuously recorded as low frequency seismic noise. Here we investigate microseism propagation away from deep-ocean source regions using the spectral element method for an oceanic model that contains realistic northeast Atlantic Ocean irregular-layered structure composed of water, sediment, and upper crust. It also includes structural heterogeneities and continental slope and shelf bathymetry. Numerical simulations of coupled acoustic and elastic wave propagation in both simplified models and the full realistic model show that most microseism energy is confined to sediment and water column waveguides. We also show that a significant portion of microseism energy is reflected back to the deep ocean by the continental slope, while only a small fraction of deep-ocean-generated microseism energy reaches land. We conclude that terrestrially observed microseisms are largely generated in shallow water on continental shelves. Key PointsThe water column is important in our understanding of microseism propagationPinch out at the shelf edge reflects back most microseism energyMicroseisms observed on land are dominated by near-coastal wave activity ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911191634&doi=10.1002%2f2014GL060979&partnerID=40&md5=63bedbd20d357f325de55dfd404e78f8
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7061
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Seismology Laboratory, School of Geological Sciences, University College Dublin, I-Dublin, Ireland
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| Recommended Citation: | |
Ying Y.,Bean C.J.,Bromirski P.D.. Propagation of microseisms from the deep ocean to land[J]. Geophysical Research Letters,2014-01-01,41(18).
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