DOI: 10.1029/2018JA025345
Scopus记录号: 2-s2.0-85052370429
论文题名: Radial Transport and Plasma Heating in Jupiter's Magnetodisc
作者: Ng C.S. ; Delamere P.A. ; Kaminker V. ; Damiano P.A.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6611
结束页码: 6620
语种: 英语
英文关键词: heating
; Jupiter
; magnetic fluctuations
; magnetosphere
; transport
; turbulence
英文摘要: The ion temperature of the magnetosphere of Jupiter derived from Galileo PLS data was observed to increase by about an order of magnitude from 10 to 40 Jupiter radii. This suggests the presence of heating sources that counteract the adiabatic cooling effect of expanding plasma. There have been different attempts of explaining this phenomena, including a magnetohydrodynamic (MHD) turbulent heating model which is based on flux tube diffusion (Saur, Astrophys. J. Lett., 602, L137, 2004). We explore an alternate turbulent heating model based on advection, similar to models commonly used in solar wind heating. Based on spectral analysis of Galileo magnetometer (MAG) data, we find that observed MHD turbulence could potentially provide the required heating to explain some of the increase in plasma temperature. This indicates that advection is a more appropriate way to describe radial transport of plasma in the Jovian magnetosphere beyond 10 Jupiter radii. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113454
Appears in Collections: 气候减缓与适应
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作者单位: Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States
Recommended Citation:
Ng C.S.,Delamere P.A.,Kaminker V.,et al. Radial Transport and Plasma Heating in Jupiter's Magnetodisc[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)