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DOI: 10.1002/2016GL070003
论文题名:
Steepening of waves at the duskside magnetopause
作者: Plaschke F.; Kahr N.; Fischer D.; Nakamura R.; Baumjohann W.; Magnes W.; Burch J.L.; Torbert R.B.; Russell C.T.; Giles B.L.; Strangeway R.J.; Leinweber H.K.; Bromund K.R.; Anderson B.J.; Le G.; Chutter M.; Slavin J.A.; Kepko E.L.
刊名: Geophysical Research Letters
ISSN: 0094-8878
EISSN: 1944-8609
出版年: 2016
卷: 43, 期:14
起始页码: 7373
结束页码: 7380
语种: 英语
英文关键词: Kelvin-Helmholtz instability ; magnetopause ; Magnetospheric Multiscale ; plasma depletion layer ; steepening ; surface wave
Scopus关键词: Facings ; Magnetic fields ; Magnetosphere ; Plasma diagnostics ; Plasma stability ; Solar system ; Spacecraft ; Surface waves ; Boundary inclination ; Depletion layer ; High-time resolution ; Interplanetary magnetic fields ; Kelvin- helmholtz instabilities ; Magnetospheric multi scale ; steepening ; Tetrahedral configurations ; Magnetopause ; accuracy assessment ; hypothesis testing ; Kelvin-Helmholtz instability ; magnetic field ; magnetopause ; measurement method ; spacecraft ; spatial resolution ; surface wave
英文摘要: Surface waves at the magnetopause flanks typically feature steeper, i.e., more inclined leading (antisunward facing) than trailing (sunward facing) edges. This is expected for Kelvin-Helmholtz instability (KHI) amplified waves. Very rarely, during northward interplanetary magnetic field (IMF) conditions, anomalous/inverse steepening has been observed. The small-scale tetrahedral configuration of the Magnetospheric Multiscale spacecraft and their high time resolution measurements enable us to routinely ascertain magnetopause boundary inclinations during surface wave passage with high accuracy by four-spacecraft timing analysis. At the dusk flank magnetopause, 77%/23% of the analyzed wave intervals exhibit regular/inverse steepening. Inverse steepening happens during northward IMF conditions, as previously reported and, in addition, during intervals of dominant equatorial IMF. Inverse steepening observed under the latter conditions may be due to the absence of KHI or due to instabilities arising from the alignment of flow and magnetic fields in the magnetosheath. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84982161841&doi=10.1002%2f2016GL070003&partnerID=40&md5=070d0b1470f0fdd1516a85ba37285b86
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9841
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 Research Institute, Austrian Academy of Sciences, Graz, Austria

Recommended Citation:
Plaschke F.,Kahr N.,Fischer D.,et al. Steepening of waves at the duskside magnetopause[J]. Geophysical Research Letters,2016-01-01,43(14).
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