TELECONNECTION INDICES

MONTH NAO EA EA-

JET

WP
DEC 99 1.5 0.2 --- -0.5
NOV 99 0.8 -1.1 --- 0.0
OCT 99 -0.2 1.5 --- -0.7
SEP 99 0.7 0.9 --- -2.5
AUG 99 -0.8 --- -0.6 -0.5
JULY 99 0.5 --- 0.3 -0.5
JUNE 99 0.7 --- 0.3 -0.2
MAY 99 0.9 --- 1.1 0.4
APR 99 -0.6 1.0 1.4 0.2
MAR 99 -0.4 -1.2 --- 0.3
FEB 99 1.8 -0.9 --- 0.8
JAN 99 1.3 -0.3 --- -0.2
DEC 98 1.0 1.0 --- 0.9

Standardized amplitudes of selected Northern Hemisphere teleconnection patterns for the most recent thirteen months. Pattern names and abbreviations are: North Atlantic Oscillation (NAO); East Atlantic pattern (EA); East Atlantic Jet pattern (EA-JET); West Pacificn pattern (WP). No value is plotted when a pattern does not appear as a leading mode in that month.