Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models.
International audience We analyze global microseism excitation patterns between July 2000 and June 2001. Seismological observations are compared with modeling results to isolate robust activity features of relevant source processes. First, we use observations of microseism source locations estimated...
Published in: | Geochemistry, Geophysics, Geosystems |
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Main Authors: | , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.science/hal-00706838 https://hal.science/hal-00706838/document https://hal.science/hal-00706838/file/G3_Hillers_OceanicMicroseismSources_2012.pdf https://doi.org/10.1029/2011GC003875 |
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HAL Sorbonne Université |
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English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Hillers, Gregor Graham, Nicholas Campillo, Michel Kedar, S. Landès, Matthieu Shapiro, N.M. Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience We analyze global microseism excitation patterns between July 2000 and June 2001. Seismological observations are compared with modeling results to isolate robust activity features of relevant source processes. First, we use observations of microseism source locations estimated by Landès et al. (2010) based on array processing of ambient noise correlations. Second, we construct synthetic activity patterns by coupling sea state estimates derived from wave action models to the excitation theory for microseisms. The overall spatiotemporal evolution of both estimates is characterized by a seasonal character that is associated with strong activity during winter months. The distribution of landmass causes seasonal changes on the Northern Hemisphere (NH) to exceed the variability on the Southern Hemisphere (SH). Our systematic comparison of the two estimates reveals significant microseism excitation along coastlines and in the open ocean. Since coastal reflections are not accounted for in the modeling approach, the consistent mismatch between near-coastal observations and predictions suggests that relevant microseism energy arriving at the networks is generated in these areas. Simultaneously, systematic coincidence away from coastlines verifies the open ocean generation hypothesis. These conclusions are universal and robust with respect to the seismic network locations on the NH. The spatially homogeneous resolution of our synthetics provides a valuable resource for the assessment of the global microseism weather. Similar to previously identified hot spot areas in the North Atlantic, the modeled distributions hypothesize regions of strong localized activity on the SH, which are only partially confirmed by the analyzed data sets. |
author2 |
Ondes et Structures Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Hydrologic Research Center Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) 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) European Project: |
format |
Article in Journal/Newspaper |
author |
Hillers, Gregor Graham, Nicholas Campillo, Michel Kedar, S. Landès, Matthieu Shapiro, N.M. |
author_facet |
Hillers, Gregor Graham, Nicholas Campillo, Michel Kedar, S. Landès, Matthieu Shapiro, N.M. |
author_sort |
Hillers, Gregor |
title |
Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
title_short |
Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
title_full |
Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
title_fullStr |
Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
title_full_unstemmed |
Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
title_sort |
global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00706838 https://hal.science/hal-00706838/document https://hal.science/hal-00706838/file/G3_Hillers_OceanicMicroseismSources_2012.pdf https://doi.org/10.1029/2011GC003875 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-00706838 Geochemistry, Geophysics, Geosystems, 2012, VOL. 13, pp.19 PP. ⟨10.1029/2011GC003875⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1029/2011GC003875 hal-00706838 https://hal.science/hal-00706838 https://hal.science/hal-00706838/document https://hal.science/hal-00706838/file/G3_Hillers_OceanicMicroseismSources_2012.pdf doi:10.1029/2011GC003875 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2011GC003875 |
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Geochemistry, Geophysics, Geosystems |
container_volume |
13 |
container_issue |
1 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1810464158283464704 |
spelling |
ftsorbonneuniv:oai:HAL:hal-00706838v1 2024-09-15T18:23:53+00:00 Global oceanic microseism sources as seen by seismic arrays and predicted by wave action models. Hillers, Gregor Graham, Nicholas Campillo, Michel Kedar, S. Landès, Matthieu Shapiro, N.M. Ondes et Structures Institut des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Hydrologic Research Center Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) 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) European Project: 2012-01-31 https://hal.science/hal-00706838 https://hal.science/hal-00706838/document https://hal.science/hal-00706838/file/G3_Hillers_OceanicMicroseismSources_2012.pdf https://doi.org/10.1029/2011GC003875 en eng HAL CCSD AGU and the Geochemical Society info:eu-repo/semantics/altIdentifier/doi/10.1029/2011GC003875 hal-00706838 https://hal.science/hal-00706838 https://hal.science/hal-00706838/document https://hal.science/hal-00706838/file/G3_Hillers_OceanicMicroseismSources_2012.pdf doi:10.1029/2011GC003875 info:eu-repo/semantics/OpenAccess EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.science/hal-00706838 Geochemistry, Geophysics, Geosystems, 2012, VOL. 13, pp.19 PP. ⟨10.1029/2011GC003875⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2012 ftsorbonneuniv https://doi.org/10.1029/2011GC003875 2024-07-25T23:47:33Z International audience We analyze global microseism excitation patterns between July 2000 and June 2001. Seismological observations are compared with modeling results to isolate robust activity features of relevant source processes. First, we use observations of microseism source locations estimated by Landès et al. (2010) based on array processing of ambient noise correlations. Second, we construct synthetic activity patterns by coupling sea state estimates derived from wave action models to the excitation theory for microseisms. The overall spatiotemporal evolution of both estimates is characterized by a seasonal character that is associated with strong activity during winter months. The distribution of landmass causes seasonal changes on the Northern Hemisphere (NH) to exceed the variability on the Southern Hemisphere (SH). Our systematic comparison of the two estimates reveals significant microseism excitation along coastlines and in the open ocean. Since coastal reflections are not accounted for in the modeling approach, the consistent mismatch between near-coastal observations and predictions suggests that relevant microseism energy arriving at the networks is generated in these areas. Simultaneously, systematic coincidence away from coastlines verifies the open ocean generation hypothesis. These conclusions are universal and robust with respect to the seismic network locations on the NH. The spatially homogeneous resolution of our synthetics provides a valuable resource for the assessment of the global microseism weather. Similar to previously identified hot spot areas in the North Atlantic, the modeled distributions hypothesize regions of strong localized activity on the SH, which are only partially confirmed by the analyzed data sets. Article in Journal/Newspaper North Atlantic HAL Sorbonne Université Geochemistry, Geophysics, Geosystems 13 1 n/a n/a |