Frequency-dependent noise sources in the North Atlantic Ocean
International audience Secondary microseisms are the most energetic waves in the noise spectra between 3 and 10 s. They are generated by ocean wave interactions and are predominantly Rayleigh waves. We study the associated noise sources in the North Atlantic Ocean by coupling noise polarization anal...
Published in: | Geochemistry, Geophysics, Geosystems |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-00925917 https://hal.science/hal-00925917/document https://hal.science/hal-00925917/file/Sergeant_et_al-2013-Geochemistry,_Geophysics,_Geosystems.pdf https://doi.org/10.1002/2013GC004905 |
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ftunivparis:oai:HAL:hal-00925917v1 2024-05-12T07:59:48+00:00 Frequency-dependent noise sources in the North Atlantic Ocean Sergeant, Amandine Stutzmann, Eléonore Maggi, Alessia Schimmel, Martin Ardhuin, Fabrice Obrebski, Mathias Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Sismologie (IPGS) (IPGS-Sismologie) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Earth Sciences Jaume Almera Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC) Laboratoire d'Océanographie Spatiale (LOS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2013 https://hal.science/hal-00925917 https://hal.science/hal-00925917/document https://hal.science/hal-00925917/file/Sergeant_et_al-2013-Geochemistry,_Geophysics,_Geosystems.pdf https://doi.org/10.1002/2013GC004905 en eng HAL CCSD AGU and the Geochemical Society info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GC004905 hal-00925917 https://hal.science/hal-00925917 https://hal.science/hal-00925917/document https://hal.science/hal-00925917/file/Sergeant_et_al-2013-Geochemistry,_Geophysics,_Geosystems.pdf doi:10.1002/2013GC004905 info:eu-repo/semantics/OpenAccess ISSN: 1525-2027 EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-00925917 Geochemistry, Geophysics, Geosystems, 2013, 14 (12), pp.5341-5353. ⟨10.1002/2013GC004905⟩ noise sources secondary microseism North Atlantic Ocean polarization [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2013 ftunivparis https://doi.org/10.1002/2013GC004905 2024-04-16T03:11:40Z International audience Secondary microseisms are the most energetic waves in the noise spectra between 3 and 10 s. They are generated by ocean wave interactions and are predominantly Rayleigh waves. We study the associated noise sources in the North Atlantic Ocean by coupling noise polarization analysis and source mapping using an ocean wave model that takes into account coastal reflections. From the Rayleigh wave polarization analysis, we retrieve the back azimuth to the noise sources in the time-frequency domain. Noise source modeling enables us to locate the associated generation areas at different times and frequencies. We analyze the distribution of secondary microseism sources in the North Atlantic Ocean using 20 broadband stations located in the Arctic and around the ocean. To model the noise sources we adjust empirically the ocean wave coastal reflection coefficient as a function of frequency. We find that coastal reflections must be taken into account for accurately modeling 7–10 s noise sources. These reflections can be neglected in the noise modeling for periods shorter than 7 s. We find a strong variability of back azimuths and source locations as a function of frequency. This variability is largely related to the local bathymetry. One direct cause of the time-dependent and frequency-dependent noise sources is the presence of sea-ice that affects the amplitude and polarization of microseisms at stations in the Arctic only at periods shorter than 4 s. Article in Journal/Newspaper Arctic North Atlantic Sea ice Université de Paris: Portail HAL Arctic Geochemistry, Geophysics, Geosystems 14 12 5341 5353 |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
noise sources secondary microseism North Atlantic Ocean polarization [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
noise sources secondary microseism North Atlantic Ocean polarization [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Sergeant, Amandine Stutzmann, Eléonore Maggi, Alessia Schimmel, Martin Ardhuin, Fabrice Obrebski, Mathias Frequency-dependent noise sources in the North Atlantic Ocean |
topic_facet |
noise sources secondary microseism North Atlantic Ocean polarization [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Secondary microseisms are the most energetic waves in the noise spectra between 3 and 10 s. They are generated by ocean wave interactions and are predominantly Rayleigh waves. We study the associated noise sources in the North Atlantic Ocean by coupling noise polarization analysis and source mapping using an ocean wave model that takes into account coastal reflections. From the Rayleigh wave polarization analysis, we retrieve the back azimuth to the noise sources in the time-frequency domain. Noise source modeling enables us to locate the associated generation areas at different times and frequencies. We analyze the distribution of secondary microseism sources in the North Atlantic Ocean using 20 broadband stations located in the Arctic and around the ocean. To model the noise sources we adjust empirically the ocean wave coastal reflection coefficient as a function of frequency. We find that coastal reflections must be taken into account for accurately modeling 7–10 s noise sources. These reflections can be neglected in the noise modeling for periods shorter than 7 s. We find a strong variability of back azimuths and source locations as a function of frequency. This variability is largely related to the local bathymetry. One direct cause of the time-dependent and frequency-dependent noise sources is the presence of sea-ice that affects the amplitude and polarization of microseisms at stations in the Arctic only at periods shorter than 4 s. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Sismologie (IPGS) (IPGS-Sismologie) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Earth Sciences Jaume Almera Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC) Laboratoire d'Océanographie Spatiale (LOS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
format |
Article in Journal/Newspaper |
author |
Sergeant, Amandine Stutzmann, Eléonore Maggi, Alessia Schimmel, Martin Ardhuin, Fabrice Obrebski, Mathias |
author_facet |
Sergeant, Amandine Stutzmann, Eléonore Maggi, Alessia Schimmel, Martin Ardhuin, Fabrice Obrebski, Mathias |
author_sort |
Sergeant, Amandine |
title |
Frequency-dependent noise sources in the North Atlantic Ocean |
title_short |
Frequency-dependent noise sources in the North Atlantic Ocean |
title_full |
Frequency-dependent noise sources in the North Atlantic Ocean |
title_fullStr |
Frequency-dependent noise sources in the North Atlantic Ocean |
title_full_unstemmed |
Frequency-dependent noise sources in the North Atlantic Ocean |
title_sort |
frequency-dependent noise sources in the north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00925917 https://hal.science/hal-00925917/document https://hal.science/hal-00925917/file/Sergeant_et_al-2013-Geochemistry,_Geophysics,_Geosystems.pdf https://doi.org/10.1002/2013GC004905 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic Sea ice |
genre_facet |
Arctic North Atlantic Sea ice |
op_source |
ISSN: 1525-2027 EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-00925917 Geochemistry, Geophysics, Geosystems, 2013, 14 (12), pp.5341-5353. ⟨10.1002/2013GC004905⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2013GC004905 hal-00925917 https://hal.science/hal-00925917 https://hal.science/hal-00925917/document https://hal.science/hal-00925917/file/Sergeant_et_al-2013-Geochemistry,_Geophysics,_Geosystems.pdf doi:10.1002/2013GC004905 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2013GC004905 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
14 |
container_issue |
12 |
container_start_page |
5341 |
op_container_end_page |
5353 |
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