Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings
We have used plasma drift and magnetic field measurements during the 2001–2009 December solstices to study, for the first time, the longitudinal dependence of equatorial ionospheric electrodynamic perturbations during sudden stratospheric warmings. Jicamarca radar measurements during these events sh...
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ftutahsudc:oai:digitalcommons.usu.edu:physics_facpub-2426 2023-05-15T15:04:02+02:00 Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings Fejer, B. G. Olson, M. E. Chau, J. L. Stolle, C. Luhr, H. Goncharenko, L. P. Yumoto, K. Nagatsuma, T. American Geophysical Union 2010-01-01T08:00:00Z https://digitalcommons.usu.edu/physics_facpub/1426 unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/physics_facpub/1426 Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. PDM All Physics Faculty Publications Physics text 2010 ftutahsudc 2022-03-07T22:26:36Z We have used plasma drift and magnetic field measurements during the 2001–2009 December solstices to study, for the first time, the longitudinal dependence of equatorial ionospheric electrodynamic perturbations during sudden stratospheric warmings. Jicamarca radar measurements during these events show large dayside downward drift (westward electric field) perturbations followed by large morning upward and afternoon downward drifts that systematically shift to later local times. Ground-based magnetometer measurements in the American, Indian, and Pacific equatorial regions show strongly enhanced electrojet currents in the morning sector and large reversed currents (i.e., counterelectrojets) in the afternoon sector with onsets near new and full moons during northern winter warming periods. CHAMP satellite and ground-based magnetic field observations indicate that the onset of these equatorial afternoon counterelectrojets is longitude dependent. Our results indicate that these large electrodynamic perturbations during stratospheric warming periods are due to strongly enhanced semidiurnal lunar wave effects. The results of our study can be used for forecasting the occurrence and evolution of these electrodynamic perturbations during arctic winter warmings. Text Arctic Utah State University: DigitalCommons@USU Arctic Indian Pacific |
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Utah State University: DigitalCommons@USU |
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topic |
Physics |
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Physics Fejer, B. G. Olson, M. E. Chau, J. L. Stolle, C. Luhr, H. Goncharenko, L. P. Yumoto, K. Nagatsuma, T. Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
topic_facet |
Physics |
description |
We have used plasma drift and magnetic field measurements during the 2001–2009 December solstices to study, for the first time, the longitudinal dependence of equatorial ionospheric electrodynamic perturbations during sudden stratospheric warmings. Jicamarca radar measurements during these events show large dayside downward drift (westward electric field) perturbations followed by large morning upward and afternoon downward drifts that systematically shift to later local times. Ground-based magnetometer measurements in the American, Indian, and Pacific equatorial regions show strongly enhanced electrojet currents in the morning sector and large reversed currents (i.e., counterelectrojets) in the afternoon sector with onsets near new and full moons during northern winter warming periods. CHAMP satellite and ground-based magnetic field observations indicate that the onset of these equatorial afternoon counterelectrojets is longitude dependent. Our results indicate that these large electrodynamic perturbations during stratospheric warming periods are due to strongly enhanced semidiurnal lunar wave effects. The results of our study can be used for forecasting the occurrence and evolution of these electrodynamic perturbations during arctic winter warmings. |
author2 |
American Geophysical Union |
format |
Text |
author |
Fejer, B. G. Olson, M. E. Chau, J. L. Stolle, C. Luhr, H. Goncharenko, L. P. Yumoto, K. Nagatsuma, T. |
author_facet |
Fejer, B. G. Olson, M. E. Chau, J. L. Stolle, C. Luhr, H. Goncharenko, L. P. Yumoto, K. Nagatsuma, T. |
author_sort |
Fejer, B. G. |
title |
Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
title_short |
Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
title_full |
Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
title_fullStr |
Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
title_full_unstemmed |
Lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
title_sort |
lunar dependent equatorial ionospheric effects during sudden stratosphericwarmings |
publisher |
Hosted by Utah State University Libraries |
publishDate |
2010 |
url |
https://digitalcommons.usu.edu/physics_facpub/1426 |
geographic |
Arctic Indian Pacific |
geographic_facet |
Arctic Indian Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
All Physics Faculty Publications |
op_relation |
https://digitalcommons.usu.edu/physics_facpub/1426 |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. |
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_version_ |
1766335861112176640 |