Climate Prediction Center

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Climate Diagnostics Bulletin

Tropical Highlights

Table of Atmospheric Indices (Table 1)

Table of Oceanic Indices (Table 2)

Time Series

Time-Longitude Sections

Mean & Anomaly Fields

Appendix 1: Outside Contributions

Table of Atmospheric Indices

DECEMBER 2008

	SLP ANOMALIES		TAHITI	850-hPa ZONAL WIND INDEX			200-hPa WIND INDEX	OLR Index
MONTH			minus	5N-5S	5N-5S	5N-5S	5N-5S	5N-5S
	TAHITI	DARWIN	DARWIN SOI	135E-180	175W-140W	135W-120W	165W-110W	160E-160W
DEC 08	1.6	-0.8	1.5	2.5	1.4	-0.4	2.0	2.3
NOV 08	1.7	-0.6	1.5	3.4	1.4	-0.1	1.5	1.2
OCT 08	2.4	0.4	1.3	2.1	0.4	-1.0	-0.2	1.1
SEP 08	2.1	-0.2	1.5	1.2	0.4	-0.5	0.4	0.3
AUG 08	2.1	0.9	0.8	1.8	0.1	-1.2	0.0	0.7
JUL 08	0.8	0.6	0.2	2.0	0.1	-1.2	0.1	0.9
JUN 08	1.2	0.8	0.3	1.7	0.5	-1.1	0.5	0.4
MAY 08	0.8	1.3	-0.3	1.3	0.7	-1.2	0.7	1.2
APR 08	1.3	0.5	0.6	2.4	1.1	-1.1	1.6	1.5
MAR 08	2.7	1.0	1.1	2.8	1.1	-1.1	1.2	2.4
FEB 08	2.6	-1.7	2.7	2.7	1.6	-0.6	2.5	2.5
JAN 08	1.7	-1.3	1.9	1.1	1.6	-0.1	1.8	1.0
DEC 07	1.5	-1.3	1.8	3.7	1.7	-0.1	0.8	2.2

TABLE 1. Atmospheric index values for the most recent 12 months. Indices are standardized by the mean annual standard deviation, except for the Tahiti and Darwin SLP anomalies which are in units of hPa. Positive (negative) values of 200-hPa zonal wind index imply westerly (easterly) anomalies. Positive (negative) values of 850-hPa zonal wind indices imply easterly (westerly) anomalies


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