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Title: Modulation of chorus intensity by ULF waves deep in the inner magnetosphere

Abstract

Previous studies have shown that chorus wave intensity can be modulated by Pc4-Pc5 compressional ULF waves. In this paper, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f <~ 0.3fce), but cannot account for the observed higher-frequency chorus waves, including the upper band chorus waves. This suggests the chorus waves at higher-frequency ranges require nonlinear mechanisms. Finally, in addition, we use combined observations of Radiation Belt Storm Probes (RBSP) A and B to verify that the ULF wave event is spatially local and does not last long.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5]; ORCiD logo [6]
  1. Univ. of Texas, Dallas, TX (United States). Dept. of Physics
  2. Chinese Academy of Sciences (CAS), Beijing (China). State Key Lab. of Space Weather. National Space Science Center
  3. Aerospace Corporation, El Segundo, CA (United States)
  4. Rice Univ., Houston, TX (United States). Dept. of Physics and Astronomy
  5. New Jersey Inst. of Technology, Newark, NJ (United States)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Univ. of Texas, Dallas, TX (United States); Rice Univ., Houston, TX (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
OSTI Identifier:
1402618
Report Number(s):
LA-UR-16-26169
Journal ID: ISSN 0094-8276; TRN: US1702880
Grant/Contract Number:  
AC52-06NA25396; AGS 1405041; NNX15AI93G; NNX14AN55G
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 43; Journal Issue: 18; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; chorus modulation; ULF wave; whistler wave; inner magnetosphere

Citation Formats

Xia, Zhiyang, Chen, Lunjin, Dai, Lei, Claudepierre, Seth G., Chan, Anthony A., Soto-Chavez, A. R., and Reeves, G. D. Modulation of chorus intensity by ULF waves deep in the inner magnetosphere. United States: N. p., 2016. Web. doi:10.1002/2016GL070280.
Xia, Zhiyang, Chen, Lunjin, Dai, Lei, Claudepierre, Seth G., Chan, Anthony A., Soto-Chavez, A. R., & Reeves, G. D. Modulation of chorus intensity by ULF waves deep in the inner magnetosphere. United States. https://doi.org/10.1002/2016GL070280
Xia, Zhiyang, Chen, Lunjin, Dai, Lei, Claudepierre, Seth G., Chan, Anthony A., Soto-Chavez, A. R., and Reeves, G. D. Mon . "Modulation of chorus intensity by ULF waves deep in the inner magnetosphere". United States. https://doi.org/10.1002/2016GL070280. https://www.osti.gov/servlets/purl/1402618.
@article{osti_1402618,
title = {Modulation of chorus intensity by ULF waves deep in the inner magnetosphere},
author = {Xia, Zhiyang and Chen, Lunjin and Dai, Lei and Claudepierre, Seth G. and Chan, Anthony A. and Soto-Chavez, A. R. and Reeves, G. D.},
abstractNote = {Previous studies have shown that chorus wave intensity can be modulated by Pc4-Pc5 compressional ULF waves. In this paper, we present Van Allen Probes observation of ULF wave modulating chorus wave intensity, which occurred deep in the magnetosphere. The ULF wave shows fundamental poloidal mode signature and mirror mode compressional nature. The observed ULF wave can modulate not only the chorus wave intensity but also the distribution of both protons and electrons. Linear growth rate analysis shows consistence with observed chorus intensity variation at low frequency (f <~ 0.3fce), but cannot account for the observed higher-frequency chorus waves, including the upper band chorus waves. This suggests the chorus waves at higher-frequency ranges require nonlinear mechanisms. Finally, in addition, we use combined observations of Radiation Belt Storm Probes (RBSP) A and B to verify that the ULF wave event is spatially local and does not last long.},
doi = {10.1002/2016GL070280},
journal = {Geophysical Research Letters},
number = 18,
volume = 43,
place = {United States},
year = {Mon Sep 05 00:00:00 EDT 2016},
month = {Mon Sep 05 00:00:00 EDT 2016}
}

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Cited by: 32 works
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Works referencing / citing this record:

On the Driver of Daytime Pc3 Auroral Pulsations
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Modulation of Locally Generated Equatorial Noise by ULF Wave
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Periodic Excitation of Chorus and ECH Waves Modulated by Ultralow Frequency Compressions
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Observational evidence of the drift-mirror plasma instability in Earth's inner magnetosphere
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Observations of Whistler Waves Correlated with Electron-scale Coherent Structures in the Magnetosheath Turbulent Plasma
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