Physics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jatp...41...11s&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 41, Jan. 1979, p. 11-23.
Physics
Atmospheric Models, Auroral Electrojets, Infrasonic Frequencies, Ionospheric Currents, Magnetic Effects, Polar Substorms, Spectral Line Width
Scientific paper
Three current structures are considered: the afternoon current model and the nighttime current model, both proposed by Scrase (1967), and a line current model. The magnetic fields induced by these ionospheric currents are studied, and techniques to deduce the speed, the direction of motion and the zenith crossing time of the electrojets from observations of surface magnetic perturbations are examined. The results are compared with the trace velocities, arrival times and trace directions of auroral infrasonic waves (AIWs). Major conclusions are that (1) there exists a reasonable time between the zenith crossing of the current and the arrival of AIWs at the ground (2) the direction of AIW travel is parallel to the current drift or the current flow; (3) the trace velocity of AIWs is equal to the calculated drift velocity of the current: and (4) AIWs can be generated only by a line or a narrow-band current. Several minutes before AIW arrival at the ground there exists current motion that satisfies the emission conditions of Wilson (1972), i.e., supersonic equatorward zenith crossing of westward current.
No associations
LandOfFree
Auroral infrasonic waves and the auroral electrojet 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 Auroral infrasonic waves and the auroral electrojet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auroral infrasonic waves and the auroral electrojet will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1142438