globalchange  > 科学计划与规划
DOI: 10.1002/2016GL071069
论文题名:
Saturn's quasiperiodic magnetohydrodynamic waves
作者: Yates J.N.; Southwood D.J.; Dougherty M.K.; Sulaiman A.H.; Masters A.; Cowley S.W.H.; Kivelson M.G.; Chen C.H.K.; Provan G.; Mitchell D.G.; Hospodarsky G.B.; Achilleos N.; Sorba A.M.; Coates A.J.
刊名: Geophysical Research Letters
ISSN: 0094-8443
EISSN: 1944-8174
出版年: 2016
卷: 43, 期:21
起始页码: 11102
结束页码: 11111
语种: 英语
英文关键词: MHD waves ; periodicity ; QP60 ; Saturn's magnetosphere
Scopus关键词: Magnetism ; Magnetohydrodynamics ; Magnetosphere ; Wave packets ; Magnetic field fluctuations ; Magnetic fluctuation ; Magnetic oscillations ; Magnetohydrodynamic waves ; MHD waves ; Northern latitudes ; Periodicity ; QP60 ; Planets
英文摘要: Quasiperiodic ∼1 h fluctuations have been recently reported by numerous instruments on board the Cassini spacecraft. The interpretation of the sources of these fluctuations has remained elusive to date. Here we provide an explanation for the origin of these fluctuations using magnetometer observations. We find that magnetic field fluctuations at high northern latitudes are Alfvénic, with small amplitudes (∼0.4nT), and are concentrated in wave packets similar to those observed in Kleindienst et al. (2009). The wave packets recur periodically at the northern magnetic oscillation period. We use a magnetospheric box model to provide an interpretation of the wave periods. Our model results suggest that the observed magnetic fluctuations are second harmonic Alfvén waves standing between the northern and southern ionospheres in Saturn's outer magnetosphere. ©2016. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995959445&doi=10.1002%2f2016GL071069&partnerID=40&md5=aecfee3e6a7cc7a71b6ce99299b61e4e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9406
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: Space and Atmospheric Physics, Imperial College London, London, United Kingdom

Recommended Citation:
Yates J.N.,Southwood D.J.,Dougherty M.K.,et al. Saturn's quasiperiodic magnetohydrodynamic waves[J]. Geophysical Research Letters,2016-01-01,43(21).
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