Horizontal electrojet associated with the sun-aligned arcs

Details Horizontal electrojet associated with the sun-aligned arcs Horizontal electrojet associated with the sun-aligned arcs

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jastp..61.1249z&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 61, Issue 17, p. 1249-1257.

Physics

Scientific paper

Analysis of two strong sun-aligned arcs over the Canadian Eureka Observatory (89° CGM) near the north magnetic pole and accompanying related ground magnetometer measurements has identified an electrojet current of ~1×104 A flowing within the arcs in a sunward direction. The electrojet current was carried by low energy electrons created by impacting precipitation drifting at E×B/B2 velocity within the arcs, where E is the dawn-to-dusk electric field. One of the arcs moved rapidly in a dawn to dusk direction. The measured arc velocity was 365 m/s. This agrees well with the velocity of 380 m/s inferred from the magnetic field signature of the electrojet current. This study suggests that such an electrojet is present whenever a polar arc is set up. However, a few conditions are required to observe clear ground magnetic signatures of the electrojet: (1) quiet local magnetic conditions; (2) a single sun aligned arc near or moving across zenith; and (3) arc excitation by >=1 keV electrons.

Affiliated with

Also associated with

No associations

Rating

Horizontal electrojet associated with the sun-aligned arcs 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 Horizontal electrojet associated with the sun-aligned arcs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Horizontal electrojet associated with the sun-aligned arcs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1288011