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Climate Diagnostics Bulletin
Climate Diagnostics Bulletin - Home Climate Diagnostics Bulletin - Forecast Climate Diagnostics Bulletin - Extratropics


  Tropical Highlights

  Table of Atmospheric Indices  (Table 1)

  Table of Oceanic Indices  (Table 2)

  Time Series

  Time-Longitude Sections

  Mean & Anomaly Fields

  Appendix 1: Outside Contributions

Tropical Highlights


Forecast Forum

ENSO-neutral conditions continued during November 2008, as sea surface temperatures (SSTs) remained near-average over much of the equatorial Pacific Ocean . However, SSTs remained below average in the central and eastern Pacific (Fig. T18).  The latest monthly SST index was -0.2°C in the Niņo-3.4 region, and -0.3°C in the Niņo-4 region (Table T2).

The oceanic thermocline along the equator, measured by the depth of the 20°C isotherm, featured shallower-than-average depths in the eastern equatorial Pacific during November (Figs. T15, T16). Consistent with this pattern, subsurface temperatures in the region were 1-3oC below average at thermocline depth (Fig. T17).

Enhanced low-level easterly winds and upper-level westerly winds were again present across the western equatorial Pacific (Figs. T20, T21). These conditions continued to be associated with suppressed convection over the central equatorial Pacific (Fig. T25).


For the latest status of the ENSO cycle see the ENSO Diagnostic Discussion at:

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