| DOI: | 10.1002/2015GL065409
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| 论文题名: | Submarine permafrost depth from ambient seismic noise |
| 作者: | Overduin P.P.; Haberland C.; Ryberg T.; Kneier F.; Jacobi T.; Grigoriev M.N.; Ohrnberger M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9419
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| EISSN: | 1944-9150
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| 出版年: | 2015
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| 卷: | 42, 期:18 | | 起始页码: | 7581
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| 结束页码: | 7588
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| 语种: | 英语
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| 英文关键词: | ambient noise
; continental shelf
; Siberia
; submarine permafrost
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| Scopus关键词: | Greenhouse gases
; Sediments
; Seismology
; Shear flow
; Shear waves
; Submarines
; Surface waves
; Wave propagation
; Ambient noise
; Ambient seismic noise
; Ambient vibrations
; Continental shelves
; Last Glacial Maximum
; Permafrost distribution
; Shear wave velocity
; SIBERIA
; Permafrost
; ambient noise
; arctic environment
; continental shelf
; greenhouse gas
; permafrost
; S-wave
; seismic noise
; vibration
; wave velocity
; Arctic Ocean
; Laptev Sea
; Siberia
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| 英文摘要: | Permafrost inundated since the last glacial maximum is degrading, potentially releasing trapped or stabilized greenhouse gases, but few observations of the depth of ice-bonded permafrost (IBP) below the seafloor exist for most of the arctic continental shelf. We use spectral ratios of the ambient vibration seismic wavefield, together with estimated shear wave velocity from the dispersion curves of surface waves, for estimating the thickness of the sediment overlying the IBP. Peaks in spectral ratios modeled for three-layered 1-D systems correspond with varying thickness of the unfrozen sediment. Seismic receivers were deployed on the seabed around Muostakh Island in the central Laptev Sea, Siberia. We derive depths of the IBP between 3.7 and 20.7-m-±-15%, increasing with distance from the shoreline. Correspondence between expected permafrost distribution, modeled response, and observational data suggests that the method is promising for the determination of the thickness of unfrozen sediment. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945488804&doi=10.1002%2f2015GL065409&partnerID=40&md5=7e79d50645c250a4cd4b88116676955d
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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/9034
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Periglacial Department, Alfred Wegener Institute Helmholtz, Center for Polar and Marine Research, Potsdam, Germany
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| Recommended Citation: | |
Overduin P.P.,Haberland C.,Ryberg T.,et al. Submarine permafrost depth from ambient seismic noise[J]. Geophysical Research Letters,2015-01-01,42(18).
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