Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere
Earth’s magnetopause separating the fast and often turbulent magnetosheath and the relatively stagnant magnetosphere provides various forms of free energy that generate low-frequency surface waves. The source mechanism of this energy includes current-driven kinetic physical processes such as magne...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2015-03-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n1/OJOOBS_2015_v32n1_1.pdf |
| _version_ | 1797332950320152576 |
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| author | Kyoung-Joo Hwang |
| author_facet | Kyoung-Joo Hwang |
| author_sort | Kyoung-Joo Hwang |
| collection | DOAJ |
| description | Earth’s magnetopause separating the fast and often turbulent magnetosheath and the relatively stagnant magnetosphere
provides various forms of free energy that generate low-frequency surface waves. The source mechanism of this energy
includes current-driven kinetic physical processes such as magnetic reconnection on the dayside magnetopause and
flux transfer events drifting along the magnetopause, and velocity shear-driven (Kelvin-Helmholtz instability) or density/
pressure gradient-driven (Rayleigh-Taylor instability) magnetohydro-dynamics (MHD) instabilities. The solar wind external
perturbations (impulsive transient pressure pulses or quasi-periodic dynamic pressure variations) act as seed fluctuations
for the magnetopause waves and trigger ULF pulsations inside the magnetosphere via global modes or mode conversion at
the magnetopause. The magnetopause waves thus play an important role in the solar wind-magnetosphere coupling, which
is the key to space weather. This paper presents recent findings regarding the generation of surface waves (e.g., Kelvin-
Helmholtz waves) at the Earth’s magnetopause and analytic and observational studies accountable for the linking of the
magnetopause waves and inner magnetospheric ULF pulsations, and the impacts of magnetopause waves on the dynamics
of the magnetopause and on the inner magnetosphere. |
| first_indexed | 2024-03-08T07:56:46Z |
| format | Article |
| id | doaj.art-723534c5c84c4e8c85f4828f976140ad |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:56:46Z |
| publishDate | 2015-03-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-723534c5c84c4e8c85f4828f976140ad2024-02-02T13:31:21ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092015-03-0132111110.5140/JASS.2015.32.1.1Magnetopause Waves Controlling the Dynamics of Earth’s MagnetosphereKyoung-Joo Hwang0NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, Maryland 20771, USAEarth’s magnetopause separating the fast and often turbulent magnetosheath and the relatively stagnant magnetosphere provides various forms of free energy that generate low-frequency surface waves. The source mechanism of this energy includes current-driven kinetic physical processes such as magnetic reconnection on the dayside magnetopause and flux transfer events drifting along the magnetopause, and velocity shear-driven (Kelvin-Helmholtz instability) or density/ pressure gradient-driven (Rayleigh-Taylor instability) magnetohydro-dynamics (MHD) instabilities. The solar wind external perturbations (impulsive transient pressure pulses or quasi-periodic dynamic pressure variations) act as seed fluctuations for the magnetopause waves and trigger ULF pulsations inside the magnetosphere via global modes or mode conversion at the magnetopause. The magnetopause waves thus play an important role in the solar wind-magnetosphere coupling, which is the key to space weather. This paper presents recent findings regarding the generation of surface waves (e.g., Kelvin- Helmholtz waves) at the Earth’s magnetopause and analytic and observational studies accountable for the linking of the magnetopause waves and inner magnetospheric ULF pulsations, and the impacts of magnetopause waves on the dynamics of the magnetopause and on the inner magnetosphere.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n1/OJOOBS_2015_v32n1_1.pdfmagnetopauseKelvin-Helmholtz wavesreconnectionULF waves |
| spellingShingle | Kyoung-Joo Hwang Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere Journal of Astronomy and Space Sciences magnetopause Kelvin-Helmholtz waves reconnection ULF waves |
| title | Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere |
| title_full | Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere |
| title_fullStr | Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere |
| title_full_unstemmed | Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere |
| title_short | Magnetopause Waves Controlling the Dynamics of Earth’s Magnetosphere |
| title_sort | magnetopause waves controlling the dynamics of earth s magnetosphere |
| topic | magnetopause Kelvin-Helmholtz waves reconnection ULF waves |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n1/OJOOBS_2015_v32n1_1.pdf |
| work_keys_str_mv | AT kyoungjoohwang magnetopausewavescontrollingthedynamicsofearthsmagnetosphere |