Home » Kim et al. 2020

Quantifying the Effect of Plasmaspheric Hiss on the Electron Loss From the Slot Region

Kim K., Y. Shprits, D. Wang, (2020), Quantifying the Effect of Plasmaspheric Hiss on the Electron Loss From the Slot Region, J. of Geophys. Res. [Space Physics], 125, e2019JA027555, doi:10.1029/2019JA027555, e2019JA027555 2019JA027555

Abstract

Abstract We present global statistical models of both wave amplitude and wave normal angle (WNA) of plasmaspheric hiss using Van Allen Probe-A observations. They utilize the time history of solar wind parameters, that is, interplanetary magnetic field BZ and solar wind speed, and the AE index for each measurement of hiss waves as inputs. The solar wind parameter-based model generally results in higher performance than using only the AE index as an input. Both observations and model results reveal a clear dependence of hiss wave distribution on the magnetic local time (MLT): Higher amplitudes with field-aligned (10o). We also examine how significantly the electron loss rates in the slot region can be changed by incorporating the model output of hiss waves into a diffusive transport simulation. Simulation results show that during a typical timescale (roughly a couple of days) of a corotating interaction region-driven storm, the nightside hiss waves with larger WNA (>30o) do not contribute to the electron loss in the slot region due to their low amplitude and large WNA, while dayside hiss with WNAs less than 30o and comparatively higher amplitudes leads to a fast drop in flux, especially for electrons of a few hundred keV.

Authors (sorted by name)

Kim Shprits Wang

Journal / Conference

Journal Of Geophysical Research (Space Physics)

Bibtex

@article{https://doi.org/10.1029/2019JA027555,
author = {Kim, Kyung-Chan and Shprits, Yuri and Wang, Dedong},
title = {Quantifying the Effect of Plasmaspheric Hiss on the Electron Loss From the Slot Region},
journal = {Journal of Geophysical Research: Space Physics},
volume = {125},
number = {5},
pages = {e2019JA027555},
keywords = {Plasmaspheric hiss, Van Allen probes, Electron slot region, statistical modeling, diffusion simulation, wave-particle interaction},
doi = {https://doi.org/10.1029/2019JA027555},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JA027555},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019JA027555},
note = {e2019JA027555 2019JA027555},
abstract = {Abstract We present global statistical models of both wave amplitude and wave normal angle (WNA) of plasmaspheric hiss using Van Allen Probe-A observations. They utilize the time history of solar wind parameters, that is, interplanetary magnetic field BZ and solar wind speed, and the AE index for each measurement of hiss waves as inputs. The solar wind parameter-based model generally results in higher performance than using only the AE index as an input. Both observations and model results reveal a clear dependence of hiss wave distribution on the magnetic local time (MLT): Higher amplitudes with field-aligned (10o). We also examine how significantly the electron loss rates in the slot region can be changed by incorporating the model output of hiss waves into a diffusive transport simulation. Simulation results show that during a typical timescale (roughly a couple of days) of a corotating interaction region-driven storm, the nightside hiss waves with larger WNA (>30o) do not contribute to the electron loss in the slot region due to their low amplitude and large WNA, while dayside hiss with WNAs less than 30o and comparatively higher amplitudes leads to a fast drop in flux, especially for electrons of a few hundred keV.},
year = {2020}
}