The influence of the IMF By component on the location of pulsed flows in the dayside ionosphere observed by an HF radar

Details The influence of the IMF By component on the location of pulsed flows in the dayside ionosphere observed by an HF radar The influence of the IMF By component on the location of pulsed flows in the dayside ionosphere observed by an HF radar

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..521p&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 4, p. 521-524

Physics

25

Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Ionosphere: Auroral Ionosphere, Ionosphere: Ionosphere/Magnetosphere Interactions

Scientific paper

A study has been performed on the effect of the By and Bz components of the Interplanetary Magnetic Field (IMF), as measured by the WIND satellite, on the occurrence of pulsed ionospheric flows as observed by the CUTLASS Finland radar. These flows have been suggested as being created at the ionospheric footprint of newly reconnected field lines. The statistical location of the pulsed flows is strongly dependent on the IMF By component, moving to the pre-noon sector during intervals of positive By and into the post-noon sector for intervals of negative By. These results directly confirm previous predictions, demonstrating that during intervals of flux transfer at the magnetopause, pulsed ionospheric convective flows are initiated. In the northern hemisphere these flows are shifted about noon in the opposite sense to the IMF By component, consistent with the average ionospheric convection pattern.

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