DOI: 10.1002/2014GL062782
论文题名: How ocean waves rock the Earth: Two mechanisms explain microseisms with periods 3 to 300s
作者: Ardhuin F. ; Gualtieri L. ; Stutzmann E.
刊名: Geophysical Research Letters
ISSN: 0094-8994
EISSN: 1944-8725
出版年: 2015
卷: 42, 期: 3 起始页码: 765
结束页码: 772
语种: 英语
英文关键词: hum
; infragravity waves
; microseisms
; numerical model
Scopus关键词: Numerical models
; Oceanography
; Seismic waves
; Water waves
; Frequency distributions
; Hum
; Infra-gravity waves
; Microseisms
; Nonlinear interactions
; Primary mechanism
; Secondary mechanisms
; Seismic wave generation
; Seismology
; gravity wave
; numerical model
; ocean wave
; seismic data
; seismic wave
; seismograph
; temporal period
; wave generation
; wave propagation
英文摘要: Microseismic activity, recorded everywhere on Earth, is largely due to ocean waves. Recent progress has clearly identified sources of microseisms in the most energetic band, with periods from 3 to 10s. In contrast, the generation of longer-period microseisms has been strongly debated. Two mechanisms have been proposed to explain seismic wave generation: a primary mechanism, by which ocean waves propagating over bottom slopes generate seismic waves, and a secondary mechanism which relies on the nonlinear interaction of ocean waves. Here we show that the primary mechanism explains the average power, frequency distribution, and most of the variability in signals recorded by vertical seismometers, for seismic periods ranging from 13 to 300s. The secondary mechanism only explains seismic motions with periods shorter than 13s. Our results build on a quantitative numerical model that gives access to time-varying maps of seismic noise sources. © 2015 The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925135931&doi=10.1002%2f2014GL062782&partnerID=40&md5=17f670b21b3b64fa952153f873abeaeb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8610
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: Ifremer, Laboratoire d'Océanographie Spatiale, Brest, France
Recommended Citation:
Ardhuin F.,Gualtieri L.,Stutzmann E.. How ocean waves rock the Earth: Two mechanisms explain microseisms with periods 3 to 300s[J]. Geophysical Research Letters,2015-01-01,42(3).