Performance Indices - Reichler and Kim 2008 - CDO version
OLD VERSION: minor errors in the code
vhis 1981 1981

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 26.8670 	land 	CRU	25.13	1.06
msl 	  3.3839 	global 	COADS	11.69	0.28
qnet 	 19.6340 	ocean 	OAFLUX	14.24	1.37
tp 	 35.4522 	global 	CMAP	38.87	0.91
ewss 	  9.3462 	ocean 	DASILVA	4.03	2.31
nsss 	  6.6711 	ocean 	DASILVA	3.10	2.15
SST 	 35.1487 	ocean 	GISS	17.21	2.04
SSS 	  0.1566 	ocean 	levitus	0.22	0.71
SICE 	2618.1608 	ocean 	GISS	0.34	7700.47
T 	 25.1926 	zonal 	ERA40	38.89	0.64
U 	  4.6523 	zonal 	ERA40	12.07	0.38
V 	  3.0859 	zonal 	ERA40	8.25	0.37
Q 	 34.2393 	zonal 	ERA40	29.41	1.16

Total Performance Index is : 593.3730
Partial PI (atm only) is   : 0.6857

Performance Indices - Reichler and Kim 2008 - CDO version
NEW VERSION: windstress, land-sea masks and 100hpa corrections
vhis 1981 1981

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 24.7869 	land 	CRU	25.13	0.98
msl 	  3.3839 	global 	COADS	11.69	0.28
qnet 	 18.3721 	ocean 	OAFLUX	14.24	1.29
tp 	 35.4522 	global 	CMAP	38.87	0.91
ewss 	  9.7611 	ocean 	DASILVA	4.03	2.42
nsss 	  6.1140 	ocean 	DASILVA	3.10	1.97
SST 	 35.1487 	ocean 	GISS	17.21	2.04
SSS 	  0.1566 	ocean 	levitus	0.22	0.71
SICE 	2618.1608 	ocean 	GISS	0.34	7700.47
T 	 23.9600 	zonal 	ERA40	38.89	0.61
U 	  4.4070 	zonal 	ERA40	12.07	0.36
V 	  2.9596 	zonal 	ERA40	8.25	0.35
Q 	 27.7096 	zonal 	ERA40	29.41	0.94

Total Performance Index is : 593.3330
Partial PI (atm only) is   : 0.6328