DOI: 10.1002/2015GL063540
论文题名: Can we probe the conductivity of the lithosphere and upper mantle using satellite tidal magnetic signals?
作者: Schnepf N.R. ; Kuvshinov A. ; Sabaka T.
刊名: Geophysical Research Letters
ISSN: 0094-9148
EISSN: 1944-8879
出版年: 2015
卷: 42, 期: 9 起始页码: 3233
结束页码: 3239
语种: 英语
英文关键词: composition of the crust and mantle
; electrical properties
; geomagnetic induction
; marine electromagnetics
; ocean tides
; satellite magnetics
Scopus关键词: Electric properties
; Electromagnetic induction
; Geomagnetism
; Magnetic fields
; Magnetism
; Magnetosphere
; Sensitivity analysis
; Conductivity distributions
; Electric and magnetic fields
; Electrical conductivity
; Geomagnetic induction
; Marine electromagnetics
; Ocean tides
; Satellite magnetic data
; Satellite magnetics
; Satellites
; electrical conductivity
; hydrographic survey
; lithosphere
; magnetic field
; satellite imagery
; sensitivity analysis
; simulation
; upper mantle
英文摘要: A few studies convincingly demonstrated that the magnetic fields induced by the lunar semidiurnal (M2) ocean flow can be identified in satellite observations. This result encourages using M2 satellite magnetic data to constrain subsurface electrical conductivity in oceanic regions. Traditional satellite-based induction studies using signals of magnetospheric origin are mostly sensitive to conducting structures because of the inductive coupling between primary and induced sources. In contrast, galvanic coupling from the oceanic tidal signal allows for studying less conductive, shallower structures. We perform global 3-D electromagnetic numerical simulations to investigate the sensitivity of M2 signals to conductivity distributions at different depths. The results of our sensitivity analysis suggest it will be promising to use M2 oceanic signals detected at satellite altitude for probing lithospheric and upper mantle conductivity. Our simulations also suggest that M2 seafloor electric and magnetic field data may provide complementary details to better constrain lithospheric conductivity. Key Points Observed and simulated satellite tidal magnetic signals agree very well Tidal satellite magnetic signals can be used to probe mantle conductivity Tidal seafloor EM signals can provide complementary information ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930482005&doi=10.1002%2f2015GL063540&partnerID=40&md5=8803a170a6a4b97fe69c8c8209e221b2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8764
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Earth, Atmospheric and Planetary Sciences, MIT, Cambridge, MA, United States
Recommended Citation:
Schnepf N.R.,Kuvshinov A.,Sabaka T.. Can we probe the conductivity of the lithosphere and upper mantle using satellite tidal magnetic signals?[J]. Geophysical Research Letters,2015-01-01,42(9).