DOI: 10.1002/2014GL060814
论文题名: Explaining Jupiter's magnetic field and equatorial jet dynamics
作者: Gastine T. ; Wicht J. ; Duarte L.D.V. ; Heimpel M. ; Becker A.
刊名: Geophysical Research Letters
ISSN: 0094-9899
EISSN: 1944-9630
出版年: 2014
卷: 41, 期: 15 起始页码: 5410
结束页码: 5419
语种: 英语
英文关键词: Jupiter dynamics
Scopus关键词: Interactive devices
; Magnetic fields
; Ab initio structure
; High electrical conductivity
; Jupiters
; Low conductivity
; Magnetic features
; Mission duration
; Numerical dynamos
; Secular variation
; Dynamo action
; Spacecraft data
; Interplanetary flight
; electrical conductivity
; global perspective
; jet flow
; Jupiter
; magnetic field
; simulation
英文摘要: Spacecraft data reveal a very Earth-like Jovian magnetic field. This is surprising since numerical simulations have shown that the vastly different interiors of terrestrial and gas planets can strongly affect the internal dynamo process. Here we present the first numerical dynamo that manages to match the structure and strength of the observed magnetic field by embracing the newest models for Jupiter's interior. Simulated dynamo action primarily occurs in the deep high electrical conductivity region, while zonal flows are dynamically constrained to a strong equatorial jet in the outer envelope of low conductivity. Our model reproduces the structure and strength of the observed global magnetic field and predicts that secondary dynamo action associated to the equatorial jet produces banded magnetic features likely observable by the Juno mission. Secular variation in our model scales to about 2000 nT per year and should also be observable during the 1 year nominal mission duration. Key Points First model that reproduces Jupiter's magnetic field Rely on up-to-date ab initio structure models Prediction testable against future Juno's measurements © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84905616390&doi=10.1002%2f2014GL060814&partnerID=40&md5=c6b0b9f04853092f7f9e98a3d827a367
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7163
Appears in Collections: 气候减缓与适应
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作者单位: Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
Recommended Citation:
Gastine T.,Wicht J.,Duarte L.D.V.,et al. Explaining Jupiter's magnetic field and equatorial jet dynamics[J]. Geophysical Research Letters,2014-01-01,41(15).