pattern of tropical sea surface temperature (SST) anomalies in the Pacific
during June 2006 featured slightly warmer than average temperature west of
the date line and in the equatorial central Pacific.
Weak negative SST anomalies remain near the South American coast (Fig.
the SST anomaly in the Nino 4 and Nino 3.4 regions are slightly positive
(values of 0.5 and 0.4 respectively), while anomalies are near zero in the
Nino 3 region, and -0.2 in the Nino 1+2 region (Table
the Tahiti – Darwin SOI is negative (-0.7) in response to higher than
average pressure over Darwin (Table T1,
Figs. T1, T19).
oceanic thermocline, measured by the depth of the 20ºC isotherm along the
equator, featured slightly above average depth across the equatorial
Pacific, except in the eastern Pacific where the depth was near average
during June. (Figs.
Consistent with these conditions, equatorial oceanic temperatures at
thermocline depth were 1-2ºC above average throughout most of the Pacific,
while temperatures were near average in the far eastern Pacific (Fig.
June, low-level winds were near-average throughout the equatorial Pacific
and Indian Ocean (Fig. T20).
Regions of enhanced convection were observed just south of equator
both in the central Indian Ocean and in the western Pacific (Figs.
T25, T26, E3).