Climate Prediction Center

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Climate Diagnostics Bulletin

Extratropical Highlights

Table of Indices (Table 3)

Global Surface Temperature E1

Temperature Anomalies (Land Only) E2

Global Precipitation E3

Regional Precip Estimates (a) E4

Regional Precip Estimates (b) E5

U.S. Precipitation E6

Northern Hemisphere

Southern Hemisphere

Stratosphere

Appendix 2: Additional Figures

Table of Teleconnection Indices

APRIL 2009

MONTH	NAO	EA	WP	EP-NP	PNA	TNH	EATL/WRUS	SCAND	POLEUR
APR 09	-0.2	0.7	-0.1	0.6	0.2	---	1.4	-0.2	1.8
MAR 09	0.6	-0.9	0.4	-1.0	-1.0	---	0.1	-0.7	-0.9
FEB 09	0.1	-0.5	2.2	0.6	-0.9	0.4	-0.8	0.6	-0.4
JAN 09	0.0	1.6	0.4	-0.3	0.6	1.9	-1.4	-0.1	0.3
DEC 08	-0.3	-0.6	1.1	---	-1.4	2.1	-1.5	0.1	-0.8
NOV 08	-0.3	-0.5	0.3	0.8	1.1	---	-1.0	-1.0	0.3
OCT 08	0.0	0.5	-0.1	-1.2	0.9	---	-1.3	-1.1	1.4
SEP 08	1.0	0.0	-0.6	-0.7	1.1	---	-0.9	1.1	-0.1
AUG 08	-1.2	0.6	-1.5	-1.1	0.9	---	-0.5	-0.6	1.1
JUL 08	-1.3	1.6	-0.6	-1.0	-0.1	---	0.2	1.1	-0.2
JUN 08	-1.4	1.0	-0.5	-0.6	-1.8	---	-0.3	-0.6	0.4
MAY 08	-1.7	-0.6	-1.2	0.4	1.3	---	0.7	0.4	-0.1
APR 08	-1.1	1.2	0.1	-0.3	-1.0	---	-0.2	0.1	-0.7

TABLE E1. Standardized amplitudes of selected Northern Hemisphere teleconnection patterns for the most recent thirteen months (computational procedures are described in Fig. E7). Pattern names and abbreviations are North Atlantic Oscillation (NAO); East Atlantic pattern (EA); West Pacific pattern (WP); East-Pacific - North Pacific pattern (EP-NP); Pacific/North American pattern (PNA); Tropical/Northern Hemisphere pattern (TNH); East Atlantic/Western Russia pattern (EATL/WRUS-called Eurasia-2 pattern by Barnston and Livezey, 1987, Mon. Wea. Rev., 115, 1083-1126); Scandanavia pattern (SCAND-called Eurasia-1 pattern by Barnston and Livezey 1987); and Polar Eurasia pattern (POLEUR). No value is plotted for calendar months in which the pattern does not appear as a leading mode.


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