globalchange  > 科学计划与规划
DOI: 10.1002/2015GL063397
论文题名:
Electrical conductivity of the Earth's mantle from the first Swarm magnetic field measurements
作者: Civet F.; Thébault E.; Verhoeven O.; Langlais B.; Saturnino D.
刊名: Geophysical Research Letters
ISSN: 0094-9507
EISSN: 1944-9238
出版年: 2015
卷: 42, 期:9
起始页码: 3338
结束页码: 3346
语种: 英语
英文关键词: electrical conductivity ; electromagnetic induction ; satellite ; Swarm ; temperature
Scopus关键词: Electric conductivity ; Electromagnetic induction ; Magnetic field measurement ; Magnetic fields ; Magnetism ; Magnetosphere ; Satellites ; Temperature ; Bayesian inversion ; Electrical conductivity ; Magnetospheric field ; Main magnetic fields ; Mantle composition ; Orders of magnitude ; Swarm ; Temperature variation ; Probability density function ; Bayesian analysis ; electrical conductivity ; ionosphere ; magnetic field ; mantle ; satellite imagery ; temperature gradient
英文摘要: We present a 1-D electrical conductivity profile of the Earth's mantle down to 2000km derived from L1b Swarm satellite magnetic field measurements from November 2013 to September 2014. We first derive a model for the main magnetic field, correct the data for a lithospheric field model, and additionally select the data to reduce the contributions of the ionospheric field. We then model the primary and induced magnetospheric fields for periods between 2 and 256days and perform a Bayesian inversion to obtain the probability density function for the electrical conductivity as function of depth. The conductivity increases by 3 orders of magnitude in the 400-900km depth range. Assuming a pyrolitic mantle composition, this profile is interpreted in terms of temperature variations leading to a temperature gradient in the lower mantle that is close to adiabatic. Key Points Eletromagnetic induction from satellite data Electrical conductivity of the Earth's mantle Temperature gradient of the lower mantle ©2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930483483&doi=10.1002%2f2015GL063397&partnerID=40&md5=9b7639044aebe1a8ecf281eacbeb45ab
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被引频次[WOS]:37   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9122
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: CNRS, University of Nantes, Laboratoire de Planétologie et de Géodynamique, UMR-6112, Nantes, France

Recommended Citation:
Civet F.,Thébault E.,Verhoeven O.,et al. Electrical conductivity of the Earth's mantle from the first Swarm magnetic field measurements[J]. Geophysical Research Letters,2015-01-01,42(9).
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