Dynamics of the Asymmetric Geospace

  • Why is geospace asymmetric?

  • What are the important temporal and spatial scales of geospace dynamics?

 

To address these unresolved questions about the Earth-space coupling we will analyze simultaneous auroral images obtained by Polar and IMAGE. SuperMAG provides data of validated ground magnetic field perturbations from more than 300 stations in both hemispheres. The SuperMAG data enables us to address differences in the electrojets as well as inter-hemispherical currents, which are important inputs to G2. The BCSS will also have experts in analyzing convection data from SuperDARN from both hemispheres (Gjerloev et al. 2007, Oksavik et al., 2010) and Cluster data (Haaland et al., 2008). Open-closed boundaries are also defining day- and night-side reconnection rates, and combined with reconnection data from Cluster (e.g., Østgaard et al., 2009) we aim at characterizing the dynamics of the Dungey cycle for various conditions.