The spread is defined as the inter-member standard deviation of the 15 members. Signal to noise ratio is taken as the ratio of interannual standard deviation of 15-member ensemble mean to the spread.

Variable	Monthly		Seasonal
	spread	signal to noise ratio	spread	signal to noise ratio
Nino1+2
Nino3
Nino34
Nino4
MDR

Seasonal Spatial Maps

Variable\Start month

Spread

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

SST

SSH

z200

z700

u200-u850

Prec

T2m

NA Prec

NA T2m

Equatorial Ocean Temp

Variable\Start month

Signal to Noise Ratio

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

SST

SSH

z200

z700

u200-u850

Prec

T2m

NA Prec

NA T2m

Equatorial Ocean Temp

Monthly spatial maps

Variable\Start month

Spread

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

SST

SSH

z200

z700

u200-u850

Prec

T2m

NA Prec

NA T2m

Equatorial Ocean Temp

Variable\Start month

Signal to Noise Ratio

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

SST

SSH

z200

z700

u200-u850

Prec

T2m

NA Prec

NA T2m

Equatorial Ocean Temp

NOAA/ National Weather Service National Centers for Environmental Prediction Climate Prediction Center 5200 Auth Road Camp Springs, Maryland 20746 Page Author: Climate Prediction Center Internet Team Page last modified: December 17, 2007	Disclaimer Information Quality Credits Glossary	Privacy Policy Freedom of Information Act (FOIA) About Us Career Opportunities