of global tropical sea surface temperature (SST) during October featured
near-average SSTs everywhere, except negative anomalies in the eastern
tropical Pacific (Fig. T18, Table T2).
The overall patterns of convection,
SSTs, low-level winds and upper-level winds remained near average over the
central and eastern tropical Pacific during October 2005 (Figs. T18,
T20, T21 and T25),
which is consistent with ENSO-neutral conditions.
thermocline, measured by the depth of the 20°C
isotherm along the equator, featured near-average depth in the central
Pacific and slightly shallower-than-average depth in the eastern Pacific
during October (Figs. T15, T16).
Consistent with these conditions, equatorial oceanic temperatures at
thermocline depth were near average throughout most of the Pacific and 1-2 oC
below average in the eastern Pacific (Fig. T17).
SOI (Table T1, Fig. T1)
was 1.1 during October, due to lower-than-average pressure over
and higher-than-average pressure over
October, negative OLR anomalies (above-average rainfall amounts) were
, the eastern equatorial
and the North Atlantic/Caribbean Sea (Figs.
and E3), the latter was consistent with the
very active Atlantic hurricane season.