[ferret_users] Spatial correlations[EOF PC, field]

[Fabian Lienert <cccma-student-003@xxxxxxxx>]

Hi Ferret crowd,

When I plot the spatial correlations between the leading principal component of an SST dataset
(inferred from Ferret's EOF functions based on correlation matrix) and the SST dataset itself, 
the correlations in the domain of the EOF analysis are very low (see attached Figure). 
In the North Pacific they are supposed to explain 20% of the total variance. 
Shouldn't R-squared averaged over the domain be about 0.2? Therefore the correlation 
should be 0.45 on average in this domain.

Thanks,
Fabian


Ferret-Code

use "SST_months.nc"
use "SST_months_ann_cycle_rem_np_eof_corr_tfunc.nc"
SET REGION/X=90e:80w/Y=20N:65N
let q = (eoftime[d=2,i=1]); let p = SST_DETRENDED[d=1]; go variance
fill correl 

/Ferret-Code

--
Fabian Lienert                  |  Canadian Centre for Climate Modelling and Analysis
PhD Candidate                   |  Environment Canada
phone: +1(250)721-7211          |  University of Victoria
cccma-student-003@xxxxxxxx      |  P.O. Box 1700
http://www.cccma.bc.ec.gc.ca    |  Victoria, BC,  V8W 2Y2, Canada