Highlights - August 2017
temperatures (SSTs) during August 2017 remained near-average across most of the equatorial Pacific (Fig. T18, Table T2). The latest monthly Niņo indices were +0.2°C for
the Niņo 4 region, -0.2°C for the Niņo 3.4 region, and -0.5°C for the Niņo 1+2 region (Table
T2, Fig. T5). The depth of the oceanic thermocline
(measured by the depth of the 20°C isotherm) was below-average over much of the
eastern equatorial Pacific (Figs. T15, T16), and
the corresponding sub-surface temperatures were 1-2°C below average (Fig. T17).
Also during August, the lower-level
trade winds were enhanced across the western equatorial Pacific and the
upper-level winds were near average over much of the equatorial Pacific (Table T1, Figs. T20, T21). Meanwhile, convection
was enhanced over the Maritime Continent and suppressed over the western and
central equatorial Pacific (Figs. T25, E3).
Collectively, these oceanic and atmospheric anomalies are consistent with ENSO-neutral
For the latest status of the ENSO
cycle see the ENSO Diagnostic Discussion at: