Highlights - February 2015
2015, sea surface temperatures (SSTs) remained above-average across the western and central equatorial
Pacific (Fig. T18,
Table T2). The latest
Nino indices were +1.0C for the Nino 4
for the Nino 3.4 region, and -0.6C for the Nino 1+2 region (Table
T2, Fig. T5). The depth of the oceanic thermocline (measured
by the depth of the 20C isotherm) was above-average across the central and
east-central equatorial Pacific (Figs. T15, T16), and the corresponding sub-surface
temperatures were 1-4C above average (Fig.
during February, the low-level easterly trade winds remained weaker than
average across much of the equatorial Pacific (Table T1, Fig. T20)
and upper-level easterly wind anomalies were observed over the east-central
equatorial Pacific (Fig.T21). Meanwhile, convection remained enhanced over
the western equatorial Pacific, and suppressed across the east-central
equatorial Pacific (Figs. T25, E3).
Collectively, these oceanic and atmospheric anomalies are consistent with
borderline, weak El Nino conditions.
latest status of the ENSO cycle see the ENSO Diagnostic Discussion at: