Substorms - A random walk from Earth to Saturn and back

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• Mervyn Freeman (British Antarctic Survey)
• Thursday 16 April 2009, 10:30-11:30
• British Antarctic Survey, Room 330B.

If you have a question about this talk, please contact Christian Franzke.

Open to non-BAS; please contact Christian Franzke (chan1 (at) bas.ac.uk) if you would like to attend.

Substorms are arguably the greatest source of uncertainty in predicting the state of the upper atmosphere. It is generally agreed that they proceed through a cycle of slow energy build-up and explosive release, but predicting even basic properties such as the time and amount of energy release remains elusive. In this talk, I will review research done at BAS in collaboration with the University of Newcastle Australia and Imperial College London in which the intermittency and predictability of substorms has been studied using a minimal model based on a random walk. In particular, I will discuss work in progress that provides possible clues to substorm behaviour by comparison of their occurrence at Earth, Jupiter and Saturn.

This talk is part of the British Antarctic Survey series.

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