RC_saturation_readme.txt

Three files are included in this
directory:

Siscoe_JGR_2005.pdf:  a paper describing a few empirically-determined
Dst prediction algorithms as well as comparisons against a physics-based ring
current model.  The "reconciliation" we reached is a saturated RC energy input
rate.

Liemohn_GRL_2002.pdf:  a paper describing RAM simulations of the Bastille Day
storm, in which the ring current results are saturated because a saturated cross
polar cap potential.

Growth_Decay_comparison.pdf:  a picture that we considered for
the Siscoe paper, but eventually did not include.  It shows the empirical formula
values for the growth rate and decay timescale for Dst prediction (the various
lines), and calculated values from RAM for the Bastille Day storm (symbols). 
Although both the OBrien-McPherron model and RAM accurately simulated the Dst time
series, they did so using different growth and decay rates.  That is, O-M has a
linear growth rate that is larger than the RAM values for large Ey. O-M also has a
faster decay rate than RAM for large Ey.  So, they both did well for large Ey. 
Which is right?  Well, as the producer of the RAM simulation results, you can guess
my bias.

-- Mike Liemohn