qThe orthogonal constrain on EOFs sometime cause the spatial structures of EOFS to have significant
amplitudes all over the spatial domain.
q č We can not get localized EOF
structures.
q č Therefore, we want to relax the
spatial orthogonal constrain
q on EOFs (but still keep the temporal orthogonal
constrain).
q č We apply the Rotated EOF
analysis.
q
qTo perform the rotated EOF
analysis, we still have to do the regular EOF first.
q č We then only keep a few EOF modes
for the rotation.
q č We “rotated” these selected few
EOFs to form new EOFs (factors).
q based on some criteria.
q č These criteria determine how
“simple” the new factors are.