Ionospheric Outflow and Ring Current Composition During 2001 Geomagnetic Storms

K.C. Retterer, M.E. Hill, D.C. Hamilton, L.M. Kistler, C.G. Mouikis, 
M.R. Collier, T.E. Moore, D.G. Mitchell


We will examine compositional changes in the near-Earth neutral H and O
emissions detected with the Low & High Energy Neutral Atom imagers (LENA &
HENA) aboard the Imager for Magnetosphere-to-Aurora Global Exploration (IMAGE)
satellite during magnetic storm periods in 2001.  In comparison with in situ
ion composition measurements from the CLUSTER Ion Spectrometry (CIS) experiment
on three of the CLUSTER spacecraft, remote neutral atom measurements from IMAGE
will be used to probe the global behavior of upflowing and ring current ions,
whose interaction with the neutral H geocorona produces energetic neutral
atoms.  By analyzing temporal and spatial variations in the composition of
neutral atoms measured with LENA that are associated with upflowing ions, ring
current ions deduced from HENA data, and direct ion observations from CIS, and
by making comparisons between individual storm periods, we will investigate the
possible transport of upflowing ionospheric ions to the ring current region.

_______________
Fall 2002 Meeting of the American Geophysical Union
San Francisco, CA, USA, 6-10 December 2002