SOI, Tahiti and Darwin SLP and OLR Anomalies
Five-month running mean of the
Southern Oscillation Index (SOI) (top), sea-level pressure anomaly (hPa)
at Darwin and Tahiti (middle), and outgoing longwave radiation anomaly (OLR)
averaged over the area 5N-5S, 160E-160W (bottom).
Anomalies in the top and middle panels are departures from the 1951-1980
base period means and are normalized by the mean annual standard
deviation. Anomalies in the bottom panel are departures from the 1979-1995
base period means. Individual monthly values are indicated by "x"s
in the top and bottom panels. The x-axis labels are centered on July.