Lunar-dependent equatorial ionospheric electrodynamic effects during sudden stratospheric warmings

B. G. Fejer, M. E. Olson, J. L. Chau, C. Stolle, H. L̈hr, L. P. Goncharenko, K. Yumoto, T. Nagatsuma

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Article numberA00G03
JournalJournal of Geophysical Research: Space Physics
Volume115
Issue number8
DOIs
Publication statusPublished - Jan 1 2010

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stratospheric warming
Upper atmosphere
electrodynamics
Electrodynamics
ionospherics
perturbation
magnetic fields
morning
warming
American Indians
winter
Magnetic field measurement
Wave effects
Radar measurement
sectors
radar
Moon
longitude
Magnetometers
electric field

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Fejer, B. G., Olson, M. E., Chau, J. L., Stolle, C., L̈hr, H., Goncharenko, L. P., ... Nagatsuma, T. (2010). Lunar-dependent equatorial ionospheric electrodynamic effects during sudden stratospheric warmings. Journal of Geophysical Research: Space Physics, 115(8), [A00G03]. https://doi.org/10.1029/2010JA015273

Lunar-dependent equatorial ionospheric electrodynamic effects during sudden stratospheric warmings. / Fejer, B. G.; Olson, M. E.; Chau, J. L.; Stolle, C.; L̈hr, H.; Goncharenko, L. P.; Yumoto, K.; Nagatsuma, T.

In: Journal of Geophysical Research: Space Physics, Vol. 115, No. 8, A00G03, 01.01.2010.

Research output: Contribution to journalArticle

Fejer, BG, Olson, ME, Chau, JL, Stolle, C, L̈hr, H, Goncharenko, LP, Yumoto, K & Nagatsuma, T 2010, 'Lunar-dependent equatorial ionospheric electrodynamic effects during sudden stratospheric warmings', Journal of Geophysical Research: Space Physics, vol. 115, no. 8, A00G03. https://doi.org/10.1029/2010JA015273
Fejer, B. G. ; Olson, M. E. ; Chau, J. L. ; Stolle, C. ; L̈hr, H. ; Goncharenko, L. P. ; Yumoto, K. ; Nagatsuma, T. / Lunar-dependent equatorial ionospheric electrodynamic effects during sudden stratospheric warmings. In: Journal of Geophysical Research: Space Physics. 2010 ; Vol. 115, No. 8.
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