The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves

We compile and analyze a data set of secondary microseismic P wave spectra that were observed by North American seismic arrays. Two distinct frequency bands, 0.13-0.15 Hz and 0.19-0.21 Hz, with enhanced P wave energy characterize the data set. Cluster analysis allows to classify the spectra and to a...

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Detalhes bibliográficos
Autores: Meschede, M., Stutzmann, E., Farra, V., Schimmel, Martin, Ardhuin, F.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/157111
Acesso em linha:http://hdl.handle.net/10261/157111
Access Level:acceso abierto
Palavra-chave:Body waves
Noise source spectra
Ocean waves
Secondary microseisms
Site effects
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spelling The Effect of Water Column Resonance on the Spectra of Secondary Microseism P WavesMeschede, M.Stutzmann, E.Farra, V.Schimmel, MartinArdhuin, F.Body wavesNoise source spectraOcean wavesSecondary microseismsSite effectsWe compile and analyze a data set of secondary microseismic P wave spectra that were observed by North American seismic arrays. Two distinct frequency bands, 0.13-0.15 Hz and 0.19-0.21 Hz, with enhanced P wave energy characterize the data set. Cluster analysis allows to classify the spectra and to associate typical spectral shapes with geographical regions: Low-frequency-dominated spectra (0.13-0.15 Hz) are mostly detected in shallower regions of the North Atlantic and the South Pacific, as well as along the Central and South American Pacific coast. High-frequency-dominated spectra (0.19-0.21 Hz) are mostly detected in deeper regions of the northwestern Pacific and the South Pacific. For a selected subset of high-quality sources, we compute synthetic spectra from an ocean wave hindcast. These synthetic spectra are able to reproduce amplitude and shape of the observed spectra, but only if P wave resonance in the water column at the source site is included in the model. Our data sets therefore indicate that the spectral peaks at 0.13-0.15 Hz and 0.19-0.21 Hz correspond to the first and second harmonics of P wave resonance in the water column that occur in shallower ocean depths (<3,000 m) and in the deep ocean (∼5,000 m), respectively. This article demonstrates the important effect of water column resonance on the amplitude and frequency of P waves that are generated by secondary microseisms and that the amplitude of high-quality sources can be predicted from ocean wave hindcasts within a factor of 0.4-6. ©2017. American Geophysical Union. All Rights Reserved.This article was funded through the ANR (Agence National de Recherche) project ANR-14-CE01-0012.Peer reviewedAmerican Geophysical UnionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/157111reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1002/2017JB014014Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1571112026-05-22T06:33:51Z
dc.title.none.fl_str_mv The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
title The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
spellingShingle The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
Meschede, M.
Body waves
Noise source spectra
Ocean waves
Secondary microseisms
Site effects
title_short The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
title_full The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
title_fullStr The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
title_full_unstemmed The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
title_sort The Effect of Water Column Resonance on the Spectra of Secondary Microseism P Waves
dc.creator.none.fl_str_mv Meschede, M.
Stutzmann, E.
Farra, V.
Schimmel, Martin
Ardhuin, F.
author Meschede, M.
author_facet Meschede, M.
Stutzmann, E.
Farra, V.
Schimmel, Martin
Ardhuin, F.
author_role author
author2 Stutzmann, E.
Farra, V.
Schimmel, Martin
Ardhuin, F.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Body waves
Noise source spectra
Ocean waves
Secondary microseisms
Site effects
topic Body waves
Noise source spectra
Ocean waves
Secondary microseisms
Site effects
description We compile and analyze a data set of secondary microseismic P wave spectra that were observed by North American seismic arrays. Two distinct frequency bands, 0.13-0.15 Hz and 0.19-0.21 Hz, with enhanced P wave energy characterize the data set. Cluster analysis allows to classify the spectra and to associate typical spectral shapes with geographical regions: Low-frequency-dominated spectra (0.13-0.15 Hz) are mostly detected in shallower regions of the North Atlantic and the South Pacific, as well as along the Central and South American Pacific coast. High-frequency-dominated spectra (0.19-0.21 Hz) are mostly detected in deeper regions of the northwestern Pacific and the South Pacific. For a selected subset of high-quality sources, we compute synthetic spectra from an ocean wave hindcast. These synthetic spectra are able to reproduce amplitude and shape of the observed spectra, but only if P wave resonance in the water column at the source site is included in the model. Our data sets therefore indicate that the spectral peaks at 0.13-0.15 Hz and 0.19-0.21 Hz correspond to the first and second harmonics of P wave resonance in the water column that occur in shallower ocean depths (<3,000 m) and in the deep ocean (∼5,000 m), respectively. This article demonstrates the important effect of water column resonance on the amplitude and frequency of P waves that are generated by secondary microseisms and that the amplitude of high-quality sources can be predicted from ocean wave hindcasts within a factor of 0.4-6. ©2017. American Geophysical Union. All Rights Reserved.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/157111
url http://hdl.handle.net/10261/157111
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1002/2017JB014014
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812455

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