Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm72c..02s&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SM72C-02
Physics
2407 Auroral Ionosphere (2704), 2455 Particle Precipitation, 2724 Magnetopause, Cusp, And Boundary Layers, 2736 Magnetosphere/Ionosphere Interactions
Scientific paper
Ion outflow is truly a cross-scale phenomenon, where localized energy conversion in the ionosphere can have a fundamental impact the global magnetosphere. The morphology of outflowing ion distributions has been well characterized by satellites, but the physical coupling to the ionospheric source remains speculative. We have amassed a 12 year database of measurements made by the Sondrestrom incoherent scatter radar (ISR) from which we will characterized the morphology of ion outflows in detail from an ionospheric perspective. Because of its high latitude, Sondrestrom is primarily within the cusp, within the polar cap, or near the polar cap boundary -- regions where the most significant ion outflows occur. The radar database is enhanced by the comprehensive set of permanent optical diagnostics at Sondrestrom, thus providing a window into the relationship between magnetospheric forcing and ionospheric response that is singular among ISR facilities. The initial focus of this study has been on intense upflow events (Vi>500 m/s, flux>5e7/cm2s at 700km) occurring when all-sky spectral imaging was available. Initial results suggest that ion upflows at the polar cap boundary are associated with soft (<100 eV) auroral rays. Prior analysis of such aurora has revealed an anomalously high altitude of the forbidden O+(732nm) emission line (>500km) [Semeter, GRL 2002, in press]. This feature may be produced by the vertical transport of aurorally produced O+(2P). If confirmed, this could lead to an optical diagnostic for ion outflow.
Doe Richard
Kamalabadi Farzad
Sanchez Ernesto
Semeter Joshua
Stroemme A.
No associations
LandOfFree
Observed relationship between rayed aurora and intense ion upflows near the polar cap boundary 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 Observed relationship between rayed aurora and intense ion upflows near the polar cap boundary, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observed relationship between rayed aurora and intense ion upflows near the polar cap boundary will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1440073