Satellite tidal magnetic signals constrain oceanic lithosphere-asthenosphere boundary

Grayver, Alexander V.; Schnepf, Neesha R.; Kuvshinov, Alexey V.; Sabaka, Terence J.; Manoj, Chandrasekharan; Olsen, Nils

doi:10.1126/sciadv.1600798

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Satellite tidal magnetic signals constrain oceanic lithosphere-asthenosphere boundary

2016
By Grayver, Alexander V. ; Schnepf, Neesha R. ; Kuvshinov, Alexey V. ; ...
Source: Science Advances, 2(9), e1600798.

[PDF-3.34 MB]

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Science Advances
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Grayver, Alexander V. ; Schnepf, Neesha R. ; Kuvshinov, Alexey V. ; Sabaka, Terence J. ; Manoj, Chandrasekharan ; ... More +

Grayver, Alexander V. ; Schnepf, Neesha R. ; Kuvshinov, Alexey V. ; Sabaka, Terence J. ; Manoj, Chandrasekharan ; Olsen, Nils Less -
NOAA Program & Office:

NESDIS (National Environmental Satellite, Data, and Information Service) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

NESDIS (National Environmental Satellite, Data, and Information Service) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
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The tidal flow of electrically conductive oceans through the geomagnetic field results in the generation of secondary magnetic signals, which provide information on the subsurface structure. Data from the new generation of satellites were shown to contain magnetic signals due to tidal flow; however, there are no reports that these signals have been used to infer subsurface structure. We use satellite-detected tidal magnetic fields to image the global electrical structure of the oceanic lithosphere and upper mantle down to a depth of about 250 km. The model derived from more than 12 years of satellite data reveals a similar to 2-km-thick upper resistive layer followed by a sharp increase in electrical conductivity likely associated with the lithosphere-asthenosphere boundary, which separates colder rigid oceanic plates from the ductile and hotter asthenosphere.
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Science Advances, 2(9), e1600798.
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https://doi.org/10.1126/sciadv.1600798
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Journal Article
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urn:sha256:27863766463855d87d51aa445f3831081fd84e54f374e34a75b60f71cc93cfc9
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Satellite tidal magnetic signals constrain oceanic lithosphere-asthenosphere boundary

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