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ULF Wave-Induced Io...
ULF Wave-Induced Ion Pitch Angle Evolution in the Dayside Outer Magnetosphere
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- Li, Xing-Yu (author)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Liu, Zhi-Yang (author)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Zong, Qiu-Gang (author)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Liu, Jian-Jun (author)
- Polar Res Inst China, Shanghai, Peoples R China.
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- Fu, Sui-Yan (author)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Zhou, Xu-Zhi (author)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China.
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- Hao, Yi-Xin (author)
- Helmholtz Ctr Potsdam, GFZ German Res Ctr Geosci, Potsdam, Germany.
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- Pollock, Craig J. (author)
- Denali Sci, Fairbanks, AK USA.
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- Russell, Christopher T. (author)
- Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USA.
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- Ergun, Robert E. (author)
- Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
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- Lindqvist, Per-Arne (author)
- KTH,Rymd- och plasmafysik
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Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China Polar Res Inst China, Shanghai, Peoples R China. (creator_code:org_t)
- American Geophysical Union (AGU), 2022
- 2022
- English.
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In: Geophysical Research Letters. - : American Geophysical Union (AGU). - 0094-8276 .- 1944-8007. ; 49:8
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Drift-bounce resonance between ultralow frequency (ULF) waves and ions is essential for ion energization in the magnetosphere. Here, we present the first comprehensive study of drift-bounce resonance in the dayside outer magnetosphere, where off-equatorial magnetic field minima would strongly distort ions' bounce and drift motion. A generalized theory is proposed, in which the effects of off-equatorial minima, time-evolving fields and ion bounce motion are taken into account. In consequence of these effects, ion pitch angle distributions undergo dramatic changes. In the presence of off-equatorial minima, the time-of-flight effect of ion bounce motion forms latitude-dependent dispersions besides "paw-track shaped" structures, while evolving wave fields cause time-dependent phase shifts in "paw-tracks." All the predicted signatures have been confirmed by 5 years of Magnetospheric Multiscale spacecraft data and numerical simulations. These results allow us to better understand the interactions between ULF waves and thermal ion species in global magnetospheric dynamics.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- ultralow frequency wave
- wave-particle interaction
- outer magnetosphere
- particle acceleration
- drift-bounce resonance
- dayside magnetosphere
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Li, Xing-Yu
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Liu, Zhi-Yang
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Zong, Qiu-Gang
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Liu, Jian-Jun
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Fu, Sui-Yan
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Zhou, Xu-Zhi
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show more...
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Hao, Yi-Xin
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Pollock, Craig J ...
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Russell, Christo ...
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Ergun, Robert E.
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Lindqvist, Per-A ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
- Articles in the publication
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Geophysical Rese ...
- By the university
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Royal Institute of Technology