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

AUGUST 2013

	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
AUG 13	0.1	-0.3	0.2	0.5	-0.4	-0.5	-1.0	0.9
JUL 13	0.5	-0.9	0.8	0.6	0.0	-0.4	0.5	0.7
JUN 13	0.4	-1.7	1.2	0.5	0.0	-0.5	0.5	0.4
MAY 13	0.8	-0.7	0.8	1.3	-0.1	0.0	0.4	0.6
APR 13	0.3	-0.2	0.2	1.5	0.6	-0.1	1.0	0.6
MAR 13	1.6	-1.1	1.5	0.4	0.5	-1.0	1.3	-0.3
FEB 13	-0.1	0.4	-0.2	1.1	0.6	-1.0	0.0	0.1
JAN 13	-1.0	-0.9	-0.1	-0.1	0.3	-0.1	1.4	-0.2
DEC 12	-0.8	0.3	-0.6	1.1	0.1	-0.5	-0.4	0.7
NOV 12	0.9	0.4	0.3	0.8	0.5	0.3	0.0	0.0
OCT 12	0.6	0.0	0.3	0.6	-0.2	-0.5	-0.2	-0.2
SEP 12	0.4	0.0	0.2	-0.3	0.4	0.6	1.2	-0.4
AUG 12	0.3	0.6	-0.2	0.6	-0.2	-0.5	-0.7	0.2

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. Anomalies are departures from the 1981-2010 base period means.


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