Attenuation tomography of the upper inner core
The solidification of the Earth's inner core shapes its texture and rheology, affecting the attenuation and scattering of seismic body waves transmitted through it. Applying attenuation tomography in a Bayesian framework to 398 high‐quality PKIKP waveforms, we invert for the apparent Q p for th...
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Gespeichert in:
| Autor*in: |
Pejić, Tanja [verfasserIn] |
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| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Rechteinformationen: |
Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Journal of geophysical research / B - Washington, DC : Union, 1978, 122(2017), 4, Seite 3008-3032 |
|---|---|
| Übergeordnetes Werk: |
volume:122 ; year:2017 ; number:4 ; pages:3008-3032 |
| Links: |
|---|
| DOI / URN: |
10.1002/2016JB013692 |
|---|
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| 520 | |a The solidification of the Earth's inner core shapes its texture and rheology, affecting the attenuation and scattering of seismic body waves transmitted through it. Applying attenuation tomography in a Bayesian framework to 398 high‐quality PKIKP waveforms, we invert for the apparent Q p for the uppermost 400 km below the inner core boundary at latitudes 45°S to 45°N. We use damping and smoothing for regularization of the inversion, and it seems that the smoothing regularization combined with the discrepancy principle works better for this particular problem of attenuation tomography. The results are consistent with a regional variation in inner core attenuation more complex than hemispherical, suggesting coupling between inner core solidification and the thermal structure of the lowermost mantle. Attenuation tomography of the inner core performed from a global data set of waveform correlated measurements Complex regional variations of attenuation The observed pattern of attenuation is not in agreement with commonly accepted spherical degree 1 | ||
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10.1002/2016JB013692 doi PQ20170901 (DE-627)OLC1994796685 (DE-599)GBVOLC1994796685 (PRQ)p1376-3317e4f4d8401610525bb528de34883d67bc01436560db8a3b7c0660cfe3a68a0 (KEY)0108436420170000122000403008attenuationtomographyoftheupperinnercore DE-627 ger DE-627 rakwb eng 550 DNB 38.70 bkl Pejić, Tanja verfasserin aut Attenuation tomography of the upper inner core 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The solidification of the Earth's inner core shapes its texture and rheology, affecting the attenuation and scattering of seismic body waves transmitted through it. Applying attenuation tomography in a Bayesian framework to 398 high‐quality PKIKP waveforms, we invert for the apparent Q p for the uppermost 400 km below the inner core boundary at latitudes 45°S to 45°N. We use damping and smoothing for regularization of the inversion, and it seems that the smoothing regularization combined with the discrepancy principle works better for this particular problem of attenuation tomography. The results are consistent with a regional variation in inner core attenuation more complex than hemispherical, suggesting coupling between inner core solidification and the thermal structure of the lowermost mantle. Attenuation tomography of the inner core performed from a global data set of waveform correlated measurements Complex regional variations of attenuation The observed pattern of attenuation is not in agreement with commonly accepted spherical degree 1 Nutzungsrecht: © 2017. American Geophysical Union. All Rights Reserved. inner core tomography attenuation Seismology Tomography Earth science Rheology Geophysics Tkalčić, Hrvoje oth Sambridge, Malcolm oth Cormier, Vernon F oth Benavente, Roberto oth Enthalten in Journal of geophysical research / B Washington, DC : Union, 1978 122(2017), 4, Seite 3008-3032 (DE-627)129366382 (DE-600)161666-3 (DE-576)014740451 0148-0227 nnns volume:122 year:2017 number:4 pages:3008-3032 http://dx.doi.org/10.1002/2016JB013692 Volltext http://onlinelibrary.wiley.com/doi/10.1002/2016JB013692/abstract https://search.proquest.com/docview/1901449367 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-GEO SSG-OPC-GGO SSG-OPC-GEO GBV_ILN_62 GBV_ILN_2027 GBV_ILN_2279 38.70 AVZ AR 122 2017 4 3008-3032 |
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550 DNB 38.70 bkl Attenuation tomography of the upper inner core inner core tomography attenuation Seismology Tomography Earth science Rheology Geophysics |
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Attenuation tomography of the upper inner core |
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Attenuation tomography of the upper inner core |
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Pejić, Tanja |
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attenuation tomography of the upper inner core |
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Attenuation tomography of the upper inner core |
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The solidification of the Earth's inner core shapes its texture and rheology, affecting the attenuation and scattering of seismic body waves transmitted through it. Applying attenuation tomography in a Bayesian framework to 398 high‐quality PKIKP waveforms, we invert for the apparent Q p for the uppermost 400 km below the inner core boundary at latitudes 45°S to 45°N. We use damping and smoothing for regularization of the inversion, and it seems that the smoothing regularization combined with the discrepancy principle works better for this particular problem of attenuation tomography. The results are consistent with a regional variation in inner core attenuation more complex than hemispherical, suggesting coupling between inner core solidification and the thermal structure of the lowermost mantle. Attenuation tomography of the inner core performed from a global data set of waveform correlated measurements Complex regional variations of attenuation The observed pattern of attenuation is not in agreement with commonly accepted spherical degree 1 |
| abstractGer |
The solidification of the Earth's inner core shapes its texture and rheology, affecting the attenuation and scattering of seismic body waves transmitted through it. Applying attenuation tomography in a Bayesian framework to 398 high‐quality PKIKP waveforms, we invert for the apparent Q p for the uppermost 400 km below the inner core boundary at latitudes 45°S to 45°N. We use damping and smoothing for regularization of the inversion, and it seems that the smoothing regularization combined with the discrepancy principle works better for this particular problem of attenuation tomography. The results are consistent with a regional variation in inner core attenuation more complex than hemispherical, suggesting coupling between inner core solidification and the thermal structure of the lowermost mantle. Attenuation tomography of the inner core performed from a global data set of waveform correlated measurements Complex regional variations of attenuation The observed pattern of attenuation is not in agreement with commonly accepted spherical degree 1 |
| abstract_unstemmed |
The solidification of the Earth's inner core shapes its texture and rheology, affecting the attenuation and scattering of seismic body waves transmitted through it. Applying attenuation tomography in a Bayesian framework to 398 high‐quality PKIKP waveforms, we invert for the apparent Q p for the uppermost 400 km below the inner core boundary at latitudes 45°S to 45°N. We use damping and smoothing for regularization of the inversion, and it seems that the smoothing regularization combined with the discrepancy principle works better for this particular problem of attenuation tomography. The results are consistent with a regional variation in inner core attenuation more complex than hemispherical, suggesting coupling between inner core solidification and the thermal structure of the lowermost mantle. Attenuation tomography of the inner core performed from a global data set of waveform correlated measurements Complex regional variations of attenuation The observed pattern of attenuation is not in agreement with commonly accepted spherical degree 1 |
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Attenuation tomography of the upper inner core |
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http://dx.doi.org/10.1002/2016JB013692 http://onlinelibrary.wiley.com/doi/10.1002/2016JB013692/abstract https://search.proquest.com/docview/1901449367 |
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Tkalčić, Hrvoje Sambridge, Malcolm Cormier, Vernon F Benavente, Roberto |
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