Home > Research > Publications & Outputs > Modeling the Varying Location of Field Line Res...

Associated organisational unit

Electronic data

  • Elsden_et_al_2022_accepted_manuscript

    Rights statement: An edited version of this paper was published by AGU. Copyright 2022 American Geophysical Union. Elsden, T., Yeoman, T. K., Wharton, S. J., Rae, I. J., Sandhu, J. K., Walach, M.-T., et al. (2022). Modeling the varying location of field line resonances during geomagnetic storms. Journal of Geophysical Research: Space Physics, 127, e2021JA029804. https://doi.org/10.1029/2021JA029804. To view the published open abstract, go to http://dx.doi.org and enter the DOI.”

    Accepted author manuscript, 4.11 MB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

View graph of relations

Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms. / Elsden, T.; Yeoman, T. K.; Wharton, S. J. et al.
In: Journal of Geophysical Research: Space Physics, Vol. 127, No. 1, e2021IJA029804, 31.01.2022.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Elsden, T, Yeoman, TK, Wharton, SJ, Rae, IJ, Sandhu, JK, Walach, M, James, MK & Wright, DM 2022, 'Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms', Journal of Geophysical Research: Space Physics, vol. 127, no. 1, e2021IJA029804. https://doi.org/10.1029/2021JA029804

APA

Elsden, T., Yeoman, T. K., Wharton, S. J., Rae, I. J., Sandhu, J. K., Walach, M., James, M. K., & Wright, D. M. (2022). Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms. Journal of Geophysical Research: Space Physics, 127(1), Article e2021IJA029804. https://doi.org/10.1029/2021JA029804

Vancouver

Elsden T, Yeoman TK, Wharton SJ, Rae IJ, Sandhu JK, Walach M et al. Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms. Journal of Geophysical Research: Space Physics. 2022 Jan 31;127(1):e2021IJA029804. Epub 2022 Jan 18. doi: 10.1029/2021JA029804

Author

Elsden, T. ; Yeoman, T. K. ; Wharton, S. J. et al. / Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms. In: Journal of Geophysical Research: Space Physics. 2022 ; Vol. 127, No. 1.

Bibtex

@article{8cef4cd01582407baa662f0a9d771802,
title = "Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms",
abstract = "Previous observational studies have shown that the natural Alfv{\'e}n frequencies of geomagnetic field lines vary significantly over the course of a geomagnetic storm, decreasing by up to 50% from their quiet time values outside the plasmasphere. This was recently demonstrated statistically using ground magnetometer observations across 132 geomagnetic storm events (Wharton et al., 2020). This then brings into question where field line resonances (FLRs) will form in storm-time conditions relative to quiet times. With storm-time radiation belt dynamics depending heavily upon wave-particle interactions, understanding how FLR locations change over the course of a storm will have important implications for this area. Using 3D magnetohydrodynamic (MHD) simulations, we investigate how changes in the Alfv{\'e}n frequency continuum of the Earth's dayside magnetosphere over the course of a geomagnetic storm affect the fast-Alfv{\'e}n wave coupling. By setting the model Alfv{\'e}n frequencies consistent with the observations, and permitting a modest change in the plasmapause/magnetopause locations consistent with storm-time behavior, we show that FLR locations can change substantially during storms. The combined effects of higher fast waveguide frequencies and lower Alfv{\'e}n frequencies during storm main phases, act together to move the FLR locations radially inwards compared to quiet times. FLRs outside of the plasmasphere are moved radially inward by 1.7 Earth radii for the cases considered.",
author = "T. Elsden and Yeoman, {T. K.} and Wharton, {S. J.} and I.J. Rae and Sandhu, {J. K.} and Maria Walach and James, {M. K.} and Wright, {D. M.}",
note = "An edited version of this paper was published by AGU. Copyright 2022 American Geophysical Union. Elsden, T., Yeoman, T. K., Wharton, S. J., Rae, I. J., Sandhu, J. K., Walach, M.-T., et al. (2022). Modeling the varying location of field line resonances during geomagnetic storms. Journal of Geophysical Research: Space Physics, 127, e2021JA029804. https://doi.org/10.1029/2021JA029804. To view the published open abstract, go to http://dx.doi.org and enter the DOI.” ",
year = "2022",
month = jan,
day = "31",
doi = "10.1029/2021JA029804",
language = "English",
volume = "127",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9402",
publisher = "Blackwell Publishing Ltd",
number = "1",

}

RIS

TY - JOUR

T1 - Modeling the Varying Location of Field Line Resonances During Geomagnetic Storms

AU - Elsden, T.

AU - Yeoman, T. K.

AU - Wharton, S. J.

AU - Rae, I.J.

AU - Sandhu, J. K.

AU - Walach, Maria

AU - James, M. K.

AU - Wright, D. M.

N1 - An edited version of this paper was published by AGU. Copyright 2022 American Geophysical Union. Elsden, T., Yeoman, T. K., Wharton, S. J., Rae, I. J., Sandhu, J. K., Walach, M.-T., et al. (2022). Modeling the varying location of field line resonances during geomagnetic storms. Journal of Geophysical Research: Space Physics, 127, e2021JA029804. https://doi.org/10.1029/2021JA029804. To view the published open abstract, go to http://dx.doi.org and enter the DOI.”

PY - 2022/1/31

Y1 - 2022/1/31

N2 - Previous observational studies have shown that the natural Alfvén frequencies of geomagnetic field lines vary significantly over the course of a geomagnetic storm, decreasing by up to 50% from their quiet time values outside the plasmasphere. This was recently demonstrated statistically using ground magnetometer observations across 132 geomagnetic storm events (Wharton et al., 2020). This then brings into question where field line resonances (FLRs) will form in storm-time conditions relative to quiet times. With storm-time radiation belt dynamics depending heavily upon wave-particle interactions, understanding how FLR locations change over the course of a storm will have important implications for this area. Using 3D magnetohydrodynamic (MHD) simulations, we investigate how changes in the Alfvén frequency continuum of the Earth's dayside magnetosphere over the course of a geomagnetic storm affect the fast-Alfvén wave coupling. By setting the model Alfvén frequencies consistent with the observations, and permitting a modest change in the plasmapause/magnetopause locations consistent with storm-time behavior, we show that FLR locations can change substantially during storms. The combined effects of higher fast waveguide frequencies and lower Alfvén frequencies during storm main phases, act together to move the FLR locations radially inwards compared to quiet times. FLRs outside of the plasmasphere are moved radially inward by 1.7 Earth radii for the cases considered.

AB - Previous observational studies have shown that the natural Alfvén frequencies of geomagnetic field lines vary significantly over the course of a geomagnetic storm, decreasing by up to 50% from their quiet time values outside the plasmasphere. This was recently demonstrated statistically using ground magnetometer observations across 132 geomagnetic storm events (Wharton et al., 2020). This then brings into question where field line resonances (FLRs) will form in storm-time conditions relative to quiet times. With storm-time radiation belt dynamics depending heavily upon wave-particle interactions, understanding how FLR locations change over the course of a storm will have important implications for this area. Using 3D magnetohydrodynamic (MHD) simulations, we investigate how changes in the Alfvén frequency continuum of the Earth's dayside magnetosphere over the course of a geomagnetic storm affect the fast-Alfvén wave coupling. By setting the model Alfvén frequencies consistent with the observations, and permitting a modest change in the plasmapause/magnetopause locations consistent with storm-time behavior, we show that FLR locations can change substantially during storms. The combined effects of higher fast waveguide frequencies and lower Alfvén frequencies during storm main phases, act together to move the FLR locations radially inwards compared to quiet times. FLRs outside of the plasmasphere are moved radially inward by 1.7 Earth radii for the cases considered.

U2 - 10.1029/2021JA029804

DO - 10.1029/2021JA029804

M3 - Journal article

VL - 127

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9402

IS - 1

M1 - e2021IJA029804

ER -