globalchange  > 气候减缓与适应
DOI: 10.1002/2014GL061401
论文题名:
Constraints on the secular variation of Mercury's magnetic field from the combined analysis of MESSENGER and Mariner 10 data
作者: Philpott L.C.; Johnson C.L.; Winslow R.M.; Anderson B.J.; Korth H.; Purucker M.E.; Solomon S.C.
刊名: Geophysical Research Letters
ISSN: 0094-9755
EISSN: 1944-9486
出版年: 2014
卷: 41, 期:19
起始页码: 6627
结束页码: 6634
语种: 英语
英文关键词: magnetic field ; Mariner 10 ; Mercury ; MESSENGER ; secular variation
Scopus关键词: Dipole moment ; Flexible couplings ; Magnetic fields ; Magnetism ; Spacecraft ; Field observations ; Internal magnetic fields ; Magnetic field data ; Mariner 10 ; MESSENGER ; Secular variation ; Space environment ; Spherical harmonic expansions ; Mercury (metal) ; electromagnetic field ; magnetic field ; magnetometer ; Mercury (planet) ; planetary atmosphere
英文摘要: Observations of Mercury's internal magnetic field from the Magnetometer on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft have revealed a dipole moment of 190 nT RM3 offset about 480 km northward from the planetary equator, where RM is Mercury's radius. We have reanalyzed magnetic field observations acquired by the Mariner 10 spacecraft during its third flyby of Mercury (M10-III) in 1975 to constrain the secular variation in the internal field over the past 40 years. With the application of techniques developed in the analysis of MESSENGER data, we find that the dipole moment that best fits the M10-III data is 188 nT RM3 offset 475 km northward from the equator. Our results are consistent with no secular variation, although variations of up to 10%, 16%, and 35%, respectively, are permitted in the zonal coefficients g10, g20, and g30 in a spherical harmonic expansion of the internal field. Key Points Mariner 10 flyby magnetic field data are reanalyzed with MESSENGER techniquesNo secular variation in Mercury's dipole moment or dipole offset is evidentResult constrains the low-degree power spectrum of Mercury's secular variation ©2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911092329&doi=10.1002%2f2014GL061401&partnerID=40&md5=e65d81e59ddca0c1ad34afe2dfbe5419
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7019
Appears in Collections:气候减缓与适应

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作者单位: Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada

Recommended Citation:
Philpott L.C.,Johnson C.L.,Winslow R.M.,et al. Constraints on the secular variation of Mercury's magnetic field from the combined analysis of MESSENGER and Mariner 10 data[J]. Geophysical Research Letters,2014-01-01,41(19).
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