Variations in lower thermosphere dynamics at midlatitudes during intense geomagnetic storms

Larisa Petrovna Goncharenko, Joseph E. Salah, John G. Foster, Chaosong Huang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

High-resolution observations of the dynamics of the ionospheric E region (100-150 km) at midlatitudes have been made with the incoherent scatter radar at Millstone Hill (42.6°N, 71.5°W) during several intense geomagnetic storms (K p - 8-9). These included the storms of 25 September 1998, 15 July 2000, and 31 March 2001. The observations reveal electric fields of up to 100 mV/m during these events and indicate E region zonal plasma drifts of 300-1000 m/s, westward in the evening sector and eastward in the morning sector, with smaller meridional drifts. The tidal pattern of neutral winds in the lower thermosphere is heavily disrupted. The zonal component of the neutral wind follows convection-driven ion flow, while the meridional component shows a more complex response to geomagnetic forcing.

Original languageEnglish
Article numberA04304
JournalJournal of Geophysical Research: Space Physics
Volume109
Issue numberA4
DOIs
Publication statusPublished - Jan 1 2004

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E region
temperate regions
geomagnetic storm
thermosphere
magnetic storms
sectors
plasma drift
incoherent scatter radar
evening
morning
radar
electric field
ionospherics
Radar
convection
Electric fields
Ions
ions
Plasmas
plasma

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
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology

Cite this

Variations in lower thermosphere dynamics at midlatitudes during intense geomagnetic storms. / Goncharenko, Larisa Petrovna; Salah, Joseph E.; Foster, John G.; Huang, Chaosong.

In: Journal of Geophysical Research: Space Physics, Vol. 109, No. A4, A04304, 01.01.2004.

Research output: Contribution to journalArticle

Goncharenko, Larisa Petrovna ; Salah, Joseph E. ; Foster, John G. ; Huang, Chaosong. / Variations in lower thermosphere dynamics at midlatitudes during intense geomagnetic storms. In: Journal of Geophysical Research: Space Physics. 2004 ; Vol. 109, No. A4.
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