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Title: Effects of electric field methods on modeling the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics

Abstract

Here, we report a self-consistent electric field coupling between the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics represented in a kinetic ring current model. This implementation in the model features another self-consistency in addition to its already existing self-consistent magnetic field coupling with plasma. The model is therefore named as Ring current-Atmosphere interaction Model with Self-Consistent magnetic (B) and electric (E) fields, or RAM-SCB-E. With this new model, we explore, by comparing with previously employed empirical Weimer potential, the impact of using self-consistent electric fields on the modeling of storm time global electric potential distribution, plasma sheet particle injection, and the subauroral polarization streams (SAPS) which heavily rely on the coupled interplay between the inner magnetosphere and midlatitude ionosphere. We find the following phenomena in the self-consistent model: (1) The spatially localized enhancement of electric field is produced within 2.5 < L < 4 during geomagnetic active time in the dusk-premidnight sector, with a similar dynamic penetration as found in statistical observations. (2) The electric potential contours show more substantial skewing toward the postmidnight than the Weimer potential, suggesting the resistance on the particles from directly injecting toward the low-L region. (3) The proton flux indeed indicates that the plasmamore » sheet inner boundary at the dusk-premidnight sector is located further away from the Earth than in the Weimer potential, and a “tongue” of low-energy protons extends eastward toward the dawn, leading to the Harang reversal. (4) SAPS are reproduced in the subauroral region, and their magnitude and latitudinal width are in reasonable agreement with data.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [3]; ORCiD logo [4]
  1. Beihang Univ., Beijing (China)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)
  4. Univ. of Texas, Dallas, TX (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1369194
Alternate Identifier(s):
OSTI ID: 1402149
Report Number(s):
LA-UR-17-20097
Journal ID: ISSN 2169-9380
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 122; Journal Issue: 5; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; Heliospheric and Magnetospheric Physics

Citation Formats

Yu, Yiqun, Jordanova, Vania Koleva, Ridley, Aaron J., Toth, Gabor, and Heelis, Roderick. Effects of electric field methods on modeling the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics. United States: N. p., 2017. Web. doi:10.1002/2016JA023850.
Yu, Yiqun, Jordanova, Vania Koleva, Ridley, Aaron J., Toth, Gabor, & Heelis, Roderick. Effects of electric field methods on modeling the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics. United States. doi:10.1002/2016JA023850.
Yu, Yiqun, Jordanova, Vania Koleva, Ridley, Aaron J., Toth, Gabor, and Heelis, Roderick. Wed . "Effects of electric field methods on modeling the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics". United States. doi:10.1002/2016JA023850. https://www.osti.gov/servlets/purl/1369194.
@article{osti_1369194,
title = {Effects of electric field methods on modeling the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics},
author = {Yu, Yiqun and Jordanova, Vania Koleva and Ridley, Aaron J. and Toth, Gabor and Heelis, Roderick},
abstractNote = {Here, we report a self-consistent electric field coupling between the midlatitude ionospheric electrodynamics and inner magnetosphere dynamics represented in a kinetic ring current model. This implementation in the model features another self-consistency in addition to its already existing self-consistent magnetic field coupling with plasma. The model is therefore named as Ring current-Atmosphere interaction Model with Self-Consistent magnetic (B) and electric (E) fields, or RAM-SCB-E. With this new model, we explore, by comparing with previously employed empirical Weimer potential, the impact of using self-consistent electric fields on the modeling of storm time global electric potential distribution, plasma sheet particle injection, and the subauroral polarization streams (SAPS) which heavily rely on the coupled interplay between the inner magnetosphere and midlatitude ionosphere. We find the following phenomena in the self-consistent model: (1) The spatially localized enhancement of electric field is produced within 2.5 < L < 4 during geomagnetic active time in the dusk-premidnight sector, with a similar dynamic penetration as found in statistical observations. (2) The electric potential contours show more substantial skewing toward the postmidnight than the Weimer potential, suggesting the resistance on the particles from directly injecting toward the low-L region. (3) The proton flux indeed indicates that the plasma sheet inner boundary at the dusk-premidnight sector is located further away from the Earth than in the Weimer potential, and a “tongue” of low-energy protons extends eastward toward the dawn, leading to the Harang reversal. (4) SAPS are reproduced in the subauroral region, and their magnitude and latitudinal width are in reasonable agreement with data.},
doi = {10.1002/2016JA023850},
journal = {Journal of Geophysical Research. Space Physics},
number = 5,
volume = 122,
place = {United States},
year = {Wed May 10 00:00:00 EDT 2017},
month = {Wed May 10 00:00:00 EDT 2017}
}

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