scholarly journals Sensitive Dependence of Ultrarelativistic Electron Precipitation on EMIC Wave Frequency

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Dae‐Young Lee
Keyword(s):  
Electron Precipitation ◽  
Wave Frequency ◽  
Ultrarelativistic Electron ◽  
Emic Wave ◽  
Sensitive Dependence

Modeling particle precipitation and effects on the ionospheric conductivity

2020 ◽  
Author(s):  
Yiqun Yu ◽  
Xingbin Tian ◽  
Minghui Zhu ◽  
Shreedevi Pr
Keyword(s):  
Ring Current ◽  
Transport Model ◽  
Current Model ◽  
Electron Precipitation ◽  
Plasma Convection ◽  
Particle Precipitation ◽  
Ionospheric Conductivity ◽  
Emic Wave ◽  
Intense Storm ◽  
Stream Transport

<p>Particle precipitation originated from the magnetosphere provides important energy source to the upper atmosphere, leading to ionization and enhancement of conductivity, which in turn changes the electric potential in the MI system to influence the plasma convection in the magnetosphere. In this study, we simulate ring current particle precipitation caused by several important loss mechanisms, including electron precipitation due to whistler wave scattering, ion precipitation due to EMIC wave diffusion and field line curvature scattering. These physical mechanisms are implemented in the kinetic ring current model via diffusion equation with associated pitch angle diffusion coefficients. The precipitation is subsequently input to a two-stream transport model at the top of ionosphere in order to examine its impact on the ionsopheric conductivity. It is found that during intense storm time, electron precipitation of tens of keV dominates in the dawn sector and leads to significant enhancement of conductivity at low altitudes. On the other hand, proton precipitation on the nightside mostly occurs for energy below 10 keV, and contributes to ionization above 100 km, resulting in enhancement of conductivity there. Consequently, the height profile of both Pedersen and Hall conductivity exhibits two layers, potentially complicating the current closure in the ionosphere system.</p>

scholarly journals Impact of EMIC‐Wave Driven Electron Precipitation on the Radiation Belts and the Atmosphere

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
A. T. Hendry ◽  
A. Seppälä ◽  
C. J. Rodger ◽  
M. A. Clilverd
Keyword(s):  
Radiation Belts ◽  
Electron Precipitation ◽  
Emic Wave

scholarly journals Confirmation of EMIC wave-driven relativistic electron precipitation

2016 ◽  
Vol 121 (6) ◽  
pp. 5366-5383 ◽  
Author(s):  
Aaron T. Hendry ◽  
Craig J. Rodger ◽  
Mark A. Clilverd ◽  
Mark J. Engebretson ◽  
Ian R. Mann ◽  
...  
Keyword(s):  
Relativistic Electron ◽  
Electron Precipitation ◽  
Emic Wave

scholarly journals Observations of coincident EMIC wave activity and duskside energetic electron precipitation on 18-19 January 2013

2015 ◽  
Vol 42 (14) ◽  
pp. 5727-5735 ◽  
Author(s):  
L. W. Blum ◽  
A. Halford ◽  
R. Millan ◽  
J. W. Bonnell ◽  
J. Goldstein ◽  
...  
Keyword(s):  
Energetic Electron ◽  
Wave Activity ◽  
Electron Precipitation ◽  
Emic Wave

scholarly journals Impact of Background Magnetic Field for EMIC Wave-Driven Electron Precipitation

2018 ◽  
Vol 123 (10) ◽  
pp. 8518-8532 ◽  
Author(s):  
L. A. Woodger ◽  
R. M. Millan ◽  
Z. Li ◽  
J. G. Sample
Keyword(s):  
Magnetic Field ◽  
Electron Precipitation ◽  
Emic Wave ◽  
Background Magnetic Field
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