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SUMMARY:Substorms - A random walk from Earth to Saturn and back - Mervyn F
 reeman (British Antarctic Survey)
DTSTART:20090416T093000Z
DTEND:20090416T103000Z
UID:TALK17621@talks.cam.ac.uk
CONTACT:Christian Franzke
DESCRIPTION:Substorms are arguably the greatest source of uncertainty in p
 redicting the state of the upper atmosphere. It is generally agreed that t
 hey proceed through a cycle of slow energy build-up and explosive release\
 , but predicting even basic properties such as the time and amount of ener
 gy release remains elusive. In this talk\, I will review research done at 
 BAS in collaboration with the University of Newcastle Australia and Imperi
 al College London in which the intermittency and predictability of substor
 ms has been studied using a minimal model based on a random walk. In parti
 cular\, I will discuss work in progress that provides possible clues to su
 bstorm behaviour by comparison of their occurrence at Earth\, Jupiter and 
 Saturn.
LOCATION:British Antarctic Survey\, Room 330B
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