Ling, Y;
Shi, Q;
Shen, XC;
Tian, A;
Li, W;
Tang, B;
Degeling, AW;
... Pu, Z; + view all
(2018)
Observations of Kelvin-Helmholtz Waves in the Earth's Magnetotail Near the Lunar Orbit.
Journal of Geophysical Research: Space Physics
, 123
(5)
pp. 3836-3847.
10.1029/2018JA025183.
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Abstract
Kelvin-Helmholtz waves (KHWs), which have been widely observed at the magnetopause in the region near the Earth, play an essential role in the transport of solar wind plasma and energy into the magnetosphere under dominantly northward interplanetary magnetic field (IMF) conditions. In this study, we present simultaneous observations of KHWs under the northward IMF observed by both the Acceleration, Reconnection, Turbulence, and Electrodynamics of Moon's Interaction with the Sun (ARTEMIS) spacecraft in the Earth's magnetotail around the lunar orbit (at X ~ -50R E , Y ~ 30R E , dusk side) and the Geotail in the near-Earth space (at X ~ -5R E , Y ~ -10R E , dawn side). The KHWs are quantitatively characterized by their dominant period, phase velocity, and wavelength, utilizing wavelet analysis and an approximation of their center-of-mass velocity. Our results suggest that the phase velocity and spatial scale of KHWs may increase as they propagate along the boundary layer toward the tail. Alternatively, the differences between the ARTEMIS and Geotail observations may indicate the possibility of dawn-dusk asymmetry in the excited KHWs in this study. Our results strongly evidence the existence of the development of KHWs in terms of their wave frequency and scale size in the magnetotail and provide insight to the time evolution of KHWs along the magnetopause.
| Type: | Article |
|---|---|
| Title: | Observations of Kelvin-Helmholtz Waves in the Earth's Magnetotail Near the Lunar Orbit |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2018JA025183 |
| Publisher version: | https://doi.org/10.1029/2018JA025183 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10050369 |
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