| DOI: | 10.1002/2015GL064531
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| 论文题名: | Global modeling of ULF waves at Mercury |
| 作者: | Kim E.-H.; Johnson J.R.; Valeo E.; Phillips C.K.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9477
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| EISSN: | 1944-9208
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| 出版年: | 2015
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| 卷: | 42, 期:13 | | 起始页码: | 5147
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| 结束页码: | 5154
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| 语种: | 英语
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| 英文关键词: | field line resonance
; ion-ion hybrid resonance
; Mercury
; mode conversion
; ULF waves
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| Scopus关键词: | Cyclotron resonance
; Magnetosphere
; Mercury (metal)
; Polarization
; Resonance
; Wave energy conversion
; Wave equations
; Field line resonances
; High magnetic latitudes
; Hybrid resonance
; Ion cyclotron frequency ranges
; Mercury's magnetosphere
; Mode conversions
; Transverse components
; ULF waves
; Ions
; compression
; geometry
; global change
; ion
; magnetic field
; magnetosphere
; Mercury (planet)
; planetary atmosphere
; polarization
; resonance
; wave generation
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| 英文摘要: | ULF waves in the ion cyclotron frequency range waves are regularly observed at Mercury's magnetosphere. Although previous statistical studies have shown that ULF waves are primarily compressional near the equator and transverse with linear polarization at higher latitude, the underlying reason for this distribution of wave polarization has not been understood. In order to address this key question, we have developed a two-dimensional, finite element code that solves the full wave equations in global magnetospheric geometry. Using this code, we show that (1) efficient mode conversion from the fast compressional waves to the ion-ion hybrid resonance occurs at Mercury consistent with previous calculations; (2) such mode-converted waves globally oscillate similar to field line resonance at Earth; and (3) compressional wave energy is primarily localized near the equator, while field-aligned transverse, linearly polarized waves generated by mode conversion at the ion-ion hybrid resonance radiate to higher latitude. Based on these wave solutions, we suggest that the strong transverse component of observed ULF waves at Mercury in high magnetic latitude can be explained as excitation of the field line resonant waves at the ion-ion hybrid resonance. Key Points Transverse ULF waves at Mercury can be generated via mode conversion Field line resonance with linear polarization globally oscillates at Mercury Waves at high latitude at Mercury could be explained as field line resonance. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938212567&doi=10.1002%2f2015GL064531&partnerID=40&md5=be150226b0c2c383515b87d356882245
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9092
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| 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: | Princeton Center for Heliophysics, Princeton University, Princeton, NJ, United States
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| Recommended Citation: | |
Kim E.-H.,Johnson J.R.,Valeo E.,et al. Global modeling of ULF waves at Mercury[J]. Geophysical Research Letters,2015-01-01,42(13).
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