Performance Indices - Reichler and Kim 2008 - CDO version
OLD VERSION: minor errors in the code
chis 1922 1922

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 25.3176 	land 	CRU	25.13	1.00
msl 	  2.7260 	global 	COADS	11.69	0.23
qnet 	 21.2199 	ocean 	OAFLUX	14.24	1.49
tp 	 44.7011 	global 	CMAP	38.87	1.15
ewss 	  8.8759 	ocean 	DASILVA	4.03	2.20
nsss 	  6.1181 	ocean 	DASILVA	3.10	1.97
SST 	 31.9927 	ocean 	GISS	17.21	1.85
SSS 	  0.1682 	ocean 	levitus	0.22	0.76
SICE 	2525.8819 	ocean 	GISS	0.34	7429.06
T 	 24.2355 	zonal 	ERA40	38.89	0.62
U 	  3.9698 	zonal 	ERA40	12.07	0.32
V 	  2.8931 	zonal 	ERA40	8.25	0.35
Q 	 34.1847 	zonal 	ERA40	29.41	1.16

Total Performance Index is : 572.4738
Partial PI (atm only) is   : 0.6900

Performance Indices - Reichler and Kim 2008 - CDO version
NEW VERSION: windstress, land-sea masks and 100hpa corrections
chis 1922 1922

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 24.1949 	land 	CRU	25.13	0.96
msl 	  2.7260 	global 	COADS	11.69	0.23
qnet 	 20.0578 	ocean 	OAFLUX	14.24	1.40
tp 	 44.7011 	global 	CMAP	38.87	1.15
ewss 	  8.9115 	ocean 	DASILVA	4.03	2.21
nsss 	  5.2421 	ocean 	DASILVA	3.10	1.69
SST 	 31.9927 	ocean 	GISS	17.21	1.85
SSS 	  0.1682 	ocean 	levitus	0.22	0.76
SICE 	2525.8819 	ocean 	GISS	0.34	7429.06
T 	 22.4151 	zonal 	ERA40	38.89	0.57
U 	  3.7060 	zonal 	ERA40	12.07	0.30
V 	  2.7811 	zonal 	ERA40	8.25	0.33
Q 	 26.8387 	zonal 	ERA40	29.41	0.91

Total Performance Index is : 572.4169
Partial PI (atm only) is   : 0.6357