Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes

Details Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11601303b&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A1, CiteID A01303

Physics

5

Ionosphere: Equatorial Ionosphere, Magnetospheric Physics: Magnetic Storms And Substorms (4305, 7954), Ionosphere: Ionospheric Disturbances, Ionosphere: Ionospheric Dynamics, Ionosphere: Ionospheric Irregularities

Scientific paper

Using multi-instrumental and multistation data, we present low-latitude ionospheric-thermospheric behavior during the geomagnetic storm of 15 May 2005. The diurnal pattern of total electron content (TEC) at a chain of equatorial to low-latitude stations shows strong positive ionospheric storm on 15 May. Latitudinal variation of TEC shows development of strong equatorial ionization anomaly (EIA) on the same day. Evidence, in terms of equatorial electrojet (EEJ) and magnetogram signatures, is presented for the prompt penetration of interplanetary electric field (IEF) as the cause of the positive ionospheric storm. Consequent to the storm time circulation resulting from the extra energy deposition via Joule heating over high latitudes, compositional changes occur in the global thermosphere. TEC enhancements on 16 May are attributed to enhancement of atomic oxygen at equatorial and low latitudes and the negative ionospheric storm on 17 May observed beyond certain low latitudes is explained in terms of enhancement of molecular species because of the storm time neutral composition changes. Strong ESF plume structures on range time intensity (RTI) map and L-band scintillation and TEC depletions in GPS measurements are observed in the longitude sectors where the local time of sudden storm commencement (SSC) falls after the post sunset hours. The ionospheric zonal electric fields are altered by the combined effects of eastward disturbance dynamo electric fields and direct prompt penetration of eastward electric fields associated with the northward turning of interplanetary magnetic field (IMF) Bz leading to subsequent development of ESF after midnight.

Affiliated with

Also associated with

No associations

Rating

Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-latitude ionospheric-thermospheric response to storm time electrodynamical coupling between high and low latitudes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1598313