pattern of tropical sea surface temperature (SST) anomalies during January
2007 featured warmer-than-average temperatures across the central and
eastern Pacific (Fig. T18). Accordingly, the SST anomalies
in the Niņo 4 and Niņo 3.4 regions remained positive (latest values of 0.8
and 0.7, respectively) (Table T2).
Darwin SOI is
negative (latest value: -1.1), primarily in response to
lower-than-average pressure over
T1, Figs. T1 and T19).
oceanic thermocline, measured by the depth of the 20ēC isotherm along the
equator, featured above average depth over the eastern equatorial Pacific
and below average depth across the central equatorial Pacific during January
with these conditions, oceanic temperatures at thermocline depth were 1-2ēC
above average over the eastern equatorial Pacific and 2-3ēC below average
across the central equatorial Pacific (Fig.
January 2007, low-level easterly anomalies (more than 3.0 m s-1)
were observed over the central equatorial Pacific (Fig. T20). Enhanced convection
(above-average rainfall amounts) was observed across the western and central
equatorial Pacific, while suppressed convection (below-average rainfall
amounts) was seen over the eastern
(Figs. T25 and
the latest status of the ENSO cycle see the ENSO Diagnostic Discussion at: http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/index.html