Spread and signal to noise ratio

Spread and signal to noise ratio (SNR) are based on forecasts from 1981 to 2006. 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

signal to noise ratio

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

dec

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

signal to noise ratio

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

dec

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