Role of High Frequency (0.1-5Hz) ULF Waves in Magnetosphere-Ionosphere Coupling: Coordinated Swarm and CARISMA Ground-based Observations
Monday, 23 May 2016
Ian Robert Mann1, Ivan Pakhotin2, David M Miles2, Georgios Balasis3, Johnathan K Burchill4, Jonathan Rae5, Colin Forsyth5, Jesper W Gjerloev6, Stavros Dimitrakoudis1, David J Knudsen4 and Ioannis A. Daglis7, (1)University of Alberta, Edmonton, AB, Canada, (2)University of Alberta, Department of Physics, Edmonton, AB, Canada, (3)National Observatory of Athens, Athens, Greece, (4)University of Calgary, Calgary, AB, Canada, (5)University College London, London, United Kingdom, (6)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, (7)National and Kapodistrian University of Athens, Athens, Greece
Abstract:
Using coordinated magnetic conjunctions between the CARSIMA ground-based magnetometer array and the Swarm satellites we examine the role of high frequency (0.1-5 Hz) ultra-low frequency (ULF) waves in magnetosphere-ionosphere coupling. Exploiting the unique capabilities of the Swarm data, we investigate the electro-dynamical properties of electromagnetic ion cyclotron (EMIC) waves, Alfven wave dynamics in the dayside cusp, and waves trapped in the ionospheric Alfven resonator (IAR) on magnetosphere-ionosphere coupling. Significantly, we utilise the multi-point capabilities of subsequent close passes of Swarm A and C to investigate the spatio-temporal structure of the magnetic and electric field perturbations, investigating their relationship to field-aligned currents (FACs), Poynting flux, and the dynamical exchange of Alfven waves between the magnetosphere and ionosphere. In addition to this scientific focus, we also investigate the impacts of these disturbances on FAC data products from the Swarm mission. Based on the results, our ultimate goal is to also investigate concepts for formulation(s) of potential new Swarm FAC data products which address the challenges associated with spatio-temporal ambiguity, including those arising from ULF waves, in the frame of the Swarm satellites.
