SPEARS Seminar: Earth-Space Coupling: Challenging four established hypotheses

Doctor Jesper Gjerloev, Johns Hopkins University. Applied Physics Laboratory.

Tuesday 27 November 2012, 1300-1400
Frankland Colloquium Room

The flow of energy and momentum between the Earth and near-space is highly variable in time and space. This implies considerable observational complications that historically have resulted in empirical models based on oversimplifying assumptions. Further advancing our understanding of the magnetosphere-ionosphere system hinges on global and continuous observations that allow us to overcome these shortcomings.

The global ground based magnetometer initiative, SuperMAG, is an excellent example of this realization. This vast data set is truly unique since it allows continuous and nearly global measurement of a fundamental parameter, the ground level magnetic field, thereby allowing studies of the global electric current system and its coupling to near-space. In this presentation I provide a general introduction to SuperMAG, discuss why you should care and test four well established models/hypotheses that appear in most space physics text books.