Background ~10
6-8
d.o.f.
Errors of the day: they lie
on the low-dim attractor
Observations ~10
5-7
d.o.f.
After the EnKF computes the analysis and the analysis error covariance
A
, the new ensemble initial perturbations
are computed:
These perturbations represent the
analysis error covariance and are
used as
initial perturbations
for the
next ensemble forecast