 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| q |
There are several ways to present EOFs. The simplest way
is to plot
|
|
|
the values of EOF itself. This presentation can not tell
you how much
|
|
|
the real amplitude this EOF represents.
|
|
|
| q |
One way to represent EOF’s amplitude is to take the time series of
|
|
|
principal components for an EOF, normalize this time
series to unit
|
|
|
variance, and then regress it against the original data set.
|
|
|
| q |
This map has the shape of the EOF, but the amplitude actually
|
|
|
corresponds to the amplitude in the real data with which
this structure
|
|
is associated.
|
|
|
| q |
If we have other variables, we can regress them all on
the PC of one
|
|
|
EOF and show the structure of several variables with the correct
|
|
|
amplitude relationship, for example, SST and surface vector wind
|
|
|
fields can both be regressed on PCs of SST.
|
|