Performance Indices - Reichler and Kim 2008 - CDO version
OLD VERSION: minor errors in the code
chis 1925 1925

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 25.7966 	land 	CRU	25.13	1.02
msl 	  2.2932 	global 	COADS	11.69	0.19
qnet 	 20.3650 	ocean 	OAFLUX	14.24	1.43
tp 	 34.9242 	global 	CMAP	38.87	0.89
ewss 	  8.2410 	ocean 	DASILVA	4.03	2.04
nsss 	  5.7662 	ocean 	DASILVA	3.10	1.86
SST 	 27.2898 	ocean 	GISS	17.21	1.58
SSS 	  0.1559 	ocean 	levitus	0.22	0.70
SICE 	2227.0879 	ocean 	GISS	0.34	6550.25
T 	 24.3776 	zonal 	ERA40	38.89	0.62
U 	  4.0132 	zonal 	ERA40	12.07	0.33
V 	  2.6304 	zonal 	ERA40	8.25	0.31
Q 	 32.4410 	zonal 	ERA40	29.41	1.10

Total Performance Index is : 504.7938
Partial PI (atm only) is   : 0.6371

Performance Indices - Reichler and Kim 2008 - CDO version
NEW VERSION: windstress, land-sea masks and 100hpa corrections
chis 1925 1925

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 23.2689 	land 	CRU	25.13	0.92
msl 	  2.2932 	global 	COADS	11.69	0.19
qnet 	 19.1505 	ocean 	OAFLUX	14.24	1.34
tp 	 34.9242 	global 	CMAP	38.87	0.89
ewss 	  7.9774 	ocean 	DASILVA	4.03	1.97
nsss 	  4.9250 	ocean 	DASILVA	3.10	1.58
SST 	 27.2898 	ocean 	GISS	17.21	1.58
SSS 	  0.1559 	ocean 	levitus	0.22	0.70
SICE 	2227.0879 	ocean 	GISS	0.34	6550.25
T 	 22.5229 	zonal 	ERA40	38.89	0.57
U 	  3.7564 	zonal 	ERA40	12.07	0.31
V 	  2.4900 	zonal 	ERA40	8.25	0.30
Q 	 25.2251 	zonal 	ERA40	29.41	0.85

Total Performance Index is : 504.7269
Partial PI (atm only) is   : 0.5757