sea surface temperature (SST) anomalies
continued to decrease across most of the equatorial Pacific Ocean during May
The latest monthly SST indices were 0.0°C for both the Niņo-3.4
and the Niņo-3 regions. (Table
T2, Fig. T5).
Consistent with this evolution, the
oceanic thermocline (measured by the depth of the 20°C
isotherm) was shallower than average across the central and eastern equatorial
Pacific (Figs. T15, T16),
with sub-surface temperatures reaching 1°C to 3°C
below average in the region (Fig.
during May, equatorial low-level easterly winds remained stronger than average
over the western and central Pacific, while the upper-level westerly wind
anomalies persisted across the central and eastern Pacific (Table
T1, Figs. T20 and T21).
This wind pattern was associated with enhanced convection over Indonesia and
suppressed convection across the central equatorial Pacific (Figs.
T25, T26 and E3).
Collectively, these oceanic and atmospheric anomalies reflect the demise of El
the latest status of the ENSO cycle see the ENSO Diagnostic Discussion at: