Surface wave tomography of the Barents Sea and surrounding regions
International audience The goal of this study is to refine knowledge of the structure and tectonic history of the European Arctic using the combination of all available seismological surface wave data, including historical data that were not used before for this purpose. We demonstrate how the impro...
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ftunivnantes:oai:HAL:hal-00311703v1 2023-05-15T14:54:25+02:00 Surface wave tomography of the Barents Sea and surrounding regions L. Levshin, Anatoli Schweitzer, Johannes Weidle, Christian M. Shapiro, Nikolai H. Ritzwoller, Michael Department of Physics Boulder University of Colorado Boulder Norwegian Seismic Array (NORSAR) University of Oslo (UiO) 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) 2007 https://hal.science/hal-00311703 https://hal.science/hal-00311703/document https://hal.science/hal-00311703/file/GJI-2007-170-441-Nicolai-Anatoli.pdf https://doi.org/10.1111/j.1365-246X.2006.03285.x en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2006.03285.x hal-00311703 https://hal.science/hal-00311703 https://hal.science/hal-00311703/document https://hal.science/hal-00311703/file/GJI-2007-170-441-Nicolai-Anatoli.pdf doi:10.1111/j.1365-246X.2006.03285.x info:eu-repo/semantics/OpenAccess ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-00311703 Geophysical Journal International, 2007, 170 (1), pp.441-459. ⟨10.1111/j.1365-246X.2006.03285.x⟩ upper mantle crustal structure European Arctic lithosphere surface waves tomography [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics info:eu-repo/semantics/article Journal articles 2007 ftunivnantes https://doi.org/10.1111/j.1365-246X.2006.03285.x 2023-02-08T09:25:06Z International audience The goal of this study is to refine knowledge of the structure and tectonic history of the European Arctic using the combination of all available seismological surface wave data, including historical data that were not used before for this purpose. We demonstrate how the improved data coverage leads to better depth and spatial resolution of the seismological model and discovery of intriguing features of upper-mantle structure. To improve the surface wave data set in the European Arctic, we extensively searched for broad-band data from stations in the area from the beginning of the 1970s until 2005. We were able to retrieve surface wave observations from regional data archives in Norway, Finland, Denmark and Russia in addition to data from the data centres of IRIS and GEOFON. Rayleigh and Love wave group velocity measurements between 10 and 150 s period were combined with existing data provided by the University of Colorado at Boulder. This new data set was inverted for maps showing the 2-D group-velocity distribution of Love and Rayleigh waves for specific periods. Using Monte Carlo inversion, we constructed a new 3-D shear velocity model of the crust and upper mantle beneath the European Arctic which provides higher resolution and accuracy than previous models. A new crustal model of the Barents Sea and surrounding areas, published recently by a collaboration between the University of Oslo, NORSAR and the USGS, constrains the 3-D inversion of the surface wave data in the shallow lithosphere. The new 3-D model, BARMOD, reveals substantial variations in shear wave speeds in the upper mantle across the region with a nominal resolution of 1° × 1°. Of particular note are clarified images of the mantle expression of the continent-ocean transition in the Norwegian Sea and a deep, high wave speed lithospheric root beneath the Eastern Barents Sea, which presumably is the remnant of several Palaeozoic collisions. Article in Journal/Newspaper Arctic Barents Sea Norwegian Sea Université de Nantes: HAL-UNIV-NANTES Arctic Barents Sea Norwegian Sea Norway Geophysical Journal International 170 1 441 459 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
upper mantle crustal structure European Arctic lithosphere surface waves tomography [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
spellingShingle |
upper mantle crustal structure European Arctic lithosphere surface waves tomography [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics L. Levshin, Anatoli Schweitzer, Johannes Weidle, Christian M. Shapiro, Nikolai H. Ritzwoller, Michael Surface wave tomography of the Barents Sea and surrounding regions |
topic_facet |
upper mantle crustal structure European Arctic lithosphere surface waves tomography [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics |
description |
International audience The goal of this study is to refine knowledge of the structure and tectonic history of the European Arctic using the combination of all available seismological surface wave data, including historical data that were not used before for this purpose. We demonstrate how the improved data coverage leads to better depth and spatial resolution of the seismological model and discovery of intriguing features of upper-mantle structure. To improve the surface wave data set in the European Arctic, we extensively searched for broad-band data from stations in the area from the beginning of the 1970s until 2005. We were able to retrieve surface wave observations from regional data archives in Norway, Finland, Denmark and Russia in addition to data from the data centres of IRIS and GEOFON. Rayleigh and Love wave group velocity measurements between 10 and 150 s period were combined with existing data provided by the University of Colorado at Boulder. This new data set was inverted for maps showing the 2-D group-velocity distribution of Love and Rayleigh waves for specific periods. Using Monte Carlo inversion, we constructed a new 3-D shear velocity model of the crust and upper mantle beneath the European Arctic which provides higher resolution and accuracy than previous models. A new crustal model of the Barents Sea and surrounding areas, published recently by a collaboration between the University of Oslo, NORSAR and the USGS, constrains the 3-D inversion of the surface wave data in the shallow lithosphere. The new 3-D model, BARMOD, reveals substantial variations in shear wave speeds in the upper mantle across the region with a nominal resolution of 1° × 1°. Of particular note are clarified images of the mantle expression of the continent-ocean transition in the Norwegian Sea and a deep, high wave speed lithospheric root beneath the Eastern Barents Sea, which presumably is the remnant of several Palaeozoic collisions. |
author2 |
Department of Physics Boulder University of Colorado Boulder Norwegian Seismic Array (NORSAR) University of Oslo (UiO) 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) |
format |
Article in Journal/Newspaper |
author |
L. Levshin, Anatoli Schweitzer, Johannes Weidle, Christian M. Shapiro, Nikolai H. Ritzwoller, Michael |
author_facet |
L. Levshin, Anatoli Schweitzer, Johannes Weidle, Christian M. Shapiro, Nikolai H. Ritzwoller, Michael |
author_sort |
L. Levshin, Anatoli |
title |
Surface wave tomography of the Barents Sea and surrounding regions |
title_short |
Surface wave tomography of the Barents Sea and surrounding regions |
title_full |
Surface wave tomography of the Barents Sea and surrounding regions |
title_fullStr |
Surface wave tomography of the Barents Sea and surrounding regions |
title_full_unstemmed |
Surface wave tomography of the Barents Sea and surrounding regions |
title_sort |
surface wave tomography of the barents sea and surrounding regions |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00311703 https://hal.science/hal-00311703/document https://hal.science/hal-00311703/file/GJI-2007-170-441-Nicolai-Anatoli.pdf https://doi.org/10.1111/j.1365-246X.2006.03285.x |
geographic |
Arctic Barents Sea Norwegian Sea Norway |
geographic_facet |
Arctic Barents Sea Norwegian Sea Norway |
genre |
Arctic Barents Sea Norwegian Sea |
genre_facet |
Arctic Barents Sea Norwegian Sea |
op_source |
ISSN: 0956-540X EISSN: 1365-246X Geophysical Journal International https://hal.science/hal-00311703 Geophysical Journal International, 2007, 170 (1), pp.441-459. ⟨10.1111/j.1365-246X.2006.03285.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-246X.2006.03285.x hal-00311703 https://hal.science/hal-00311703 https://hal.science/hal-00311703/document https://hal.science/hal-00311703/file/GJI-2007-170-441-Nicolai-Anatoli.pdf doi:10.1111/j.1365-246X.2006.03285.x |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1365-246X.2006.03285.x |
container_title |
Geophysical Journal International |
container_volume |
170 |
container_issue |
1 |
container_start_page |
441 |
op_container_end_page |
459 |
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1766326153674489856 |