Solar Flare Effects on 150-km Echoes Observed Over Jicamarca: WACCM-X Simulations

N. M. Pedatella; J. L. Chau; J. Vierinen; L. Qian; P. Reyes; E. Kudeki; G. Lehmacher; M. Oppenheim

doi:10.1029/2019GL084790

Solar Flare Effects on 150-km Echoes Observed Over Jicamarca: WACCM-X Simulations

N. M. Pedatella, J. L. Chau, J. Vierinen, L. Qian, P. Reyes, E. Kudeki, G. Lehmacher, M. Oppenheim

Research output: Contribution to journal › Article

Abstract

Jicamarca Radio Observatory observations and Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (WACCM-X) simulations are used to investigate the effects of the 7 September 2005 X-17 solar flare on 150-km echoes, electron densities, and vertical plasma drifts. The solar flare produces a remarkably similar response in the observed 150-km echoes and simulated electron densities. The results provide additional evidence of the relationship between the background electron density and the layering structure that is seen in 150-km echoes. The simulations also capture a similar rapid decrease in vertical plasma drift velocity that is seen in the observations. The simulated change in vertical plasma drift is, however, weaker than the observed decrease at the longitude of Jicamarca, though it is stronger east of Jicamarca. The effect of the solar flare on the vertical plasma drifts is primarily attributed to changes in conductivity due to the enhanced ionization during the solar flare.

Original language	English (US)
Pages (from-to)	10951-10958
Number of pages	8
Journal	Geophysical Research Letters
Volume	46
Issue number	20
DOIs	https://doi.org/10.1029/2019GL084790
State	Published - Oct 28 2019

Keywords

150-km echoes
WACCM-X
equatorial ionosphere
solar flare

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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Pedatella, N. M., Chau, J. L., Vierinen, J., Qian, L., Reyes, P., Kudeki, E., Lehmacher, G., & Oppenheim, M. (2019). Solar Flare Effects on 150-km Echoes Observed Over Jicamarca: WACCM-X Simulations. Geophysical Research Letters, 46(20), 10951-10958. https://doi.org/10.1029/2019GL084790

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title = "Solar Flare Effects on 150-km Echoes Observed Over Jicamarca: WACCM-X Simulations",

abstract = "Jicamarca Radio Observatory observations and Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (WACCM-X) simulations are used to investigate the effects of the 7 September 2005 X-17 solar flare on 150-km echoes, electron densities, and vertical plasma drifts. The solar flare produces a remarkably similar response in the observed 150-km echoes and simulated electron densities. The results provide additional evidence of the relationship between the background electron density and the layering structure that is seen in 150-km echoes. The simulations also capture a similar rapid decrease in vertical plasma drift velocity that is seen in the observations. The simulated change in vertical plasma drift is, however, weaker than the observed decrease at the longitude of Jicamarca, though it is stronger east of Jicamarca. The effect of the solar flare on the vertical plasma drifts is primarily attributed to changes in conductivity due to the enhanced ionization during the solar flare.",

keywords = "150-km echoes, WACCM-X, equatorial ionosphere, solar flare",

author = "Pedatella, {N. M.} and Chau, {J. L.} and J. Vierinen and L. Qian and P. Reyes and E. Kudeki and G. Lehmacher and M. Oppenheim",

year = "2019",

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AU - Pedatella, N. M.

AU - Chau, J. L.

AU - Vierinen, J.

AU - Qian, L.

AU - Reyes, P.

AU - Kudeki, E.

AU - Lehmacher, G.

AU - Oppenheim, M.

PY - 2019/10/28

Y1 - 2019/10/28

N2 - Jicamarca Radio Observatory observations and Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (WACCM-X) simulations are used to investigate the effects of the 7 September 2005 X-17 solar flare on 150-km echoes, electron densities, and vertical plasma drifts. The solar flare produces a remarkably similar response in the observed 150-km echoes and simulated electron densities. The results provide additional evidence of the relationship between the background electron density and the layering structure that is seen in 150-km echoes. The simulations also capture a similar rapid decrease in vertical plasma drift velocity that is seen in the observations. The simulated change in vertical plasma drift is, however, weaker than the observed decrease at the longitude of Jicamarca, though it is stronger east of Jicamarca. The effect of the solar flare on the vertical plasma drifts is primarily attributed to changes in conductivity due to the enhanced ionization during the solar flare.

AB - Jicamarca Radio Observatory observations and Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (WACCM-X) simulations are used to investigate the effects of the 7 September 2005 X-17 solar flare on 150-km echoes, electron densities, and vertical plasma drifts. The solar flare produces a remarkably similar response in the observed 150-km echoes and simulated electron densities. The results provide additional evidence of the relationship between the background electron density and the layering structure that is seen in 150-km echoes. The simulations also capture a similar rapid decrease in vertical plasma drift velocity that is seen in the observations. The simulated change in vertical plasma drift is, however, weaker than the observed decrease at the longitude of Jicamarca, though it is stronger east of Jicamarca. The effect of the solar flare on the vertical plasma drifts is primarily attributed to changes in conductivity due to the enhanced ionization during the solar flare.

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