Observations of IMF and seasonal effects in high-latitude convection

Details Observations of IMF and seasonal effects in high-latitude convection Observations of IMF and seasonal effects in high-latitude convection

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22.1121r&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 9, p. 1121-1124

Physics

27

Annual Variations, Convection, Earth Ionosphere, Interplanetary Magnetic Fields, Night, Plasmas (Physics), Polar Regions, Magnetohydrodynamic Flow, Statistical Analysis, Velocity Distribution, Zonal Flow (Meteorology)

Scientific paper

Strong interplanetary magnetic field (IMF) and seasonal effects in the convection of nightside ionospheric plasma are described. The findings are based on a statistical analysis of observations made with the Johns Hopkins University/ Applied Physics Lab (JHU/APL) HF radar located at Goose Bay, Labrador. For positive sign of the IMF dusk-dawn component, By greater than 0 the dawn cell is more crescent shaped and the dusk cell more round while for BY less than 0 these pairings of size and shape are reversed. The more extreme crescent /round cell dichotomy is obtained for BY greater than 0. The return flows associated with the crescent-shaped cell dominate at midnight MLT (magnetic local time); the reversal in the zonal velocity in the 67 deg-69 deg lambda (magnetic latitude) interval occurs 2.5 hr earlier in summer than in winter. The maximum effects are obtained on the nightside for the pairings By greater than 0, summer and BY less than 0, winter; the first produces the more structured cell in the morning, the second in the evening, and this cell dominates the return flow at midnight. The difference in the zonal flow reversals for these pairings exceeds 4 hr in MLT.

Affiliated with

Also associated with

No associations

Rating

Observations of IMF and seasonal effects in high-latitude convection 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 Observations of IMF and seasonal effects in high-latitude convection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of IMF and seasonal effects in high-latitude convection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1060718