MONTH EP NP PNA EATL/

WRUS

SCAND
APR 2001 1.4 -1.7 -0.1 -1.2 -0.1
MAR 2001 1.0 0.3 -0.1 0.2 -1.2
FEB 2001 -1.0 --- -1.8 1.3 -0.3
JAN 2001 1.3 --- 0.9 -0.2 1.5
DEC 2000 -0.5 --- 1.1 0.1 0.7
NOV 2000 0.1 --- 0.6 -0.9 2.0
OCT 2000 0.6 --- -1.1 -0.7 2.1
SEP 2000 --- --- -0.2 0.3 -0.2
AUG 2000 --- --- -0.9 --- 0.5
JUL 2000 0.1 -1.1 --- --- ---
JUN 2000 -0.3 -1.4 --- --- ---
MAY 2000 0.7 0.0 -0.2 1.5 -0.8
APR 2000 2.9 0.9 0.1 0.1 1.2

Standardized amplitudes of selected Northern Hemisphere teleconnection patterns for the most recent thirteen months. Pattern names and abbreviations are: East Pacific pattern (EP); North Pacific pattern (NP); Pacific/ North American pattern (PNA); East Atlantic/ Western Russia pattern (EATL/ WRUS- called Eurasia-2 pattern by Barnston and Livezey, 1987, Mon. Wea. Rev., 6, 1083-1126); and Scandinavia pattern (SCAND- called Eurasia-1 pattern by Barnston and Livezey 1987). No value is plotted when a pattern does not appear as a leading mode in that month.