Performance Indices - Reichler and Kim 2008 - CDO version
OLD VERSION: minor errors in the code
chis 1979 1979

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 20.3153 	land 	CRU	25.13	0.80
msl 	  1.9913 	global 	COADS	11.69	0.17
qnet 	 20.0504 	ocean 	OAFLUX	14.24	1.40
tp 	 44.7853 	global 	CMAP	38.87	1.15
ewss 	  8.6639 	ocean 	DASILVA	4.03	2.14
nsss 	  5.5049 	ocean 	DASILVA	3.10	1.77
SST 	 31.6929 	ocean 	GISS	17.21	1.84
SSS 	  0.1379 	ocean 	levitus	0.22	0.62
SICE 	2204.8840 	ocean 	GISS	0.34	6484.95
T 	 21.0219 	zonal 	ERA40	38.89	0.54
U 	  4.3291 	zonal 	ERA40	12.07	0.35
V 	  2.9180 	zonal 	ERA40	8.25	0.35
Q 	 27.4904 	zonal 	ERA40	29.41	0.93

Total Performance Index is : 499.7700
Partial PI (atm only) is   : 0.6128

Performance Indices - Reichler and Kim 2008 - CDO version
NEW VERSION: windstress, land-sea masks and 100hpa corrections
chis 1979 1979

Field 		PI 	Domain	Dataset	CMIP3	RatioCMIP3
t2m 	 18.9576 	land 	CRU	25.13	0.75
msl 	  1.9913 	global 	COADS	11.69	0.17
qnet 	 18.8586 	ocean 	OAFLUX	14.24	1.32
tp 	 44.7853 	global 	CMAP	38.87	1.15
ewss 	  8.8974 	ocean 	DASILVA	4.03	2.20
nsss 	  5.3239 	ocean 	DASILVA	3.10	1.71
SST 	 31.6929 	ocean 	GISS	17.21	1.84
SSS 	  0.1379 	ocean 	levitus	0.22	0.62
SICE 	2204.8840 	ocean 	GISS	0.34	6484.95
T 	 19.7373 	zonal 	ERA40	38.89	0.50
U 	  4.1686 	zonal 	ERA40	12.07	0.34
V 	  2.8148 	zonal 	ERA40	8.25	0.34
Q 	 21.2592 	zonal 	ERA40	29.41	0.72

Total Performance Index is : 499.7392
Partial PI (atm only) is   : 0.5671