https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 High-latitude observations of impulse-driven ULF pulsations in the ionosphere and on the ground https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:3282 Wed 11 Apr 2018 15:43:26 AEST ]]> Statistical analysis of the dependence of large-scale Birkeland currents on solar wind parameters https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:11505 y/Bz)) since this governs the spatial morphology of the currents. The Birkeland current densities were then corrected for variations in EUV-produced ionospheric conductance by normalizing the current densities to those occurring for 0° dipole tilt. To determine the dependence of the currents on other solar wind variables for a given IMF clock angle, the data were then sorted sequentially by the following parameters: the solar wind electric field in the plane normal to the Earth–Sun line, Eyz; the solar wind ram pressure; and the solar wind Alfvén Mach number. The solar wind electric field is the dominant factor determining the Birkeland current intensities. The currents shift toward noon and expand equatorward with increasing solar wind electric field. The total current increases by 0.8 MA per mV m⁻¹ increase in Eyz for southward IMF, while for northward IMF it is nearly independent of the electric field, increasing by only 0.1 MA per mV m⁻¹ increase in Eyz. The dependence on solar wind pressure is comparatively modest. After correcting for the solar dynamo dependencies in intensity and distribution, the total current intensity increases with solar wind dynamic pressure by 0.4 MA/nPa for southward IMF. Normalizing the Birkeland current densities to both the median solar wind electric field and dynamic pressure effects, we find no significant dependence of the Birkeland currents on solar wind Alfvén Mach number.]]> Wed 11 Apr 2018 11:29:24 AEST ]]> Global observations of electromagnetic and particle energy flux for an event during northern winter with southward interplanetary magnetic field https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:4433 Wed 11 Apr 2018 10:29:48 AEST ]]> Observations and modelling of the wave mode evolution of an impulse-driven 3 mHz ULF wave https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:11152 Wed 11 Apr 2018 09:36:27 AEST ]]> Propagation of ULF waves through the ionosphere: inductive effect for oblique magnetic fields https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:2001 Tue 17 Sep 2024 14:56:31 AEST ]]> High-latitude electromagnetic and particle energy flux during an event with sustained strongly northward IMF https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:392 Tue 10 Sep 2024 14:46:26 AEST ]]>