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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


The pattern of tropical sea surface temperature (SST) anomalies

Tropical Highlights - August 2019



During August 2019, sea surface temperatures (SSTs) were below-average in the eastern equatorial Pacific and above-average in the western equatorial Pacific (Fig. T18, Table T2). The latest monthly Niņo indices were -0.4°C for the Niņo 1+2 region, +0.2°C for the Niņo 3.4 region and +0.9°C for the Niņo 4 region (Table T2, Fig. T5). The depth of the oceanic thermocline (measured by the depth of the 20°C isotherm) was slightly above-average in the west-central equatorial Pacific and below-average in the eastern equatorial Pacific (Figs. T15, T16). The corresponding sub-surface temperatures were 0-1°C above average in the west-central equatorial Pacific, and 0-1°C below average in the eastern equatorial Pacific (Fig. T17).


Also during August, both the lower-level easterly winds and upper-level westerly winds were near-average across much of the equatorial Pacific (Table T1, Fig. T20, Fig. T21). Meanwhile, tropical convection was suppressed over Indonesia and near-average across the tropical Pacific (Figs. T25, E3). Collectively, these oceanic and atmospheric anomalies reflected ENSO-neutral conditions.


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

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Page Last Modified: September 2019
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