Niņo persisted during March
2010, as the sea surface temperatures
(SSTs) remained well above average across the central and eastern equatorial
Pacific Ocean (Fig.
The latest monthly SST indices were +1.1°C for both the Niņo-3.4
and the Niņo-4 regions. (Table
T2, Fig. T5).
Consistent with this warmth, the
oceanic thermocline (measured by the depth of the 20°C
isotherm) remained deeper than average across the central and eastern equatorial
Pacific (Figs. T15, T16),
with sub-surface temperatures reaching +1°C to +5°C
above average in the eastern
equatorial Pacific (Fig. T17).
consistent with El Niņo, equatorial convection during March remained enhanced
over the central and eastern Pacific and suppressed across Indonesia and western
Pacific (Figs. T25,
T26 and E3).
While equatorial low-level easterly winds strengthened near the Date Line, the
upper-level easterly wind anomalies persisted over the eastern equatorial
Pacific during the month (Table T1,
the latest status of the ENSO cycle see the ENSO Diagnostic Discussion at: