pattern of tropical sea surface temperature (SST) anomalies during October
2006 featured warmer-than-average temperatures across the central and
eastern Pacific (Fig. T18).
Accordingly, the SST anomalies in the Niņo 4, Niņo 3.4 and
Niņo 1+2 regions remained
positive (latest values of 1.0, 0.9 and 1.2, respectively) (Table
T2). Meanwhile, for the sixth month in a row,
Darwin SOI is
negative (latest value: -1.7), primarily in response to higher than average
pressure over Darwin (Table T1,
Figs. T1, T19).
oceanic thermocline, measured by the depth of the 20ēC isotherm along the
equator, featured above average depth over most of the equatorial Pacific
during October (Figs. T15,
with these conditions, oceanic temperatures at thermocline depth were 1-2ēC
above average throughout most of the equatorial Pacific (Fig.
October 2006, low-level westerly (easterly) anomalies (more than 3.0 m s-1)
were observed across the equatorial Pacific (eastern
Suppressed convection (below-average rainfall amounts) was observed
across the eastern
enhanced convection (above-average rainfall amounts) was seen over the
equatorial Pacific, west of the Date Line (Figs.