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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

DECEMBER 2014

The pattern of tropical sea surface temperature (SST) anomalies

Tropical Highlights - December 2014

 

 

During December 2014, sea surface temperatures (SSTs) were above-average across the equatorial Pacific, although the positive SST anomalies decreased over the central and eastern equatorial Pacific (Fig. T18, Table T2). The latest monthly Niņo indices were +0.8°C for the Niņo 3.4 region and +0.1°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 above-average over the eastern equatorial Pacific (Figs. T15, T16), and the corresponding sub-surface temperatures were 1-4°C above average in that region (Fig. T17).

Also during December, the low-level easterly trade winds remained near-average across much of the equatorial Pacific (Table T1, Fig. T20). Meanwhile, tropical convection remained enhanced over Indonesia and suppressed near the Date Line (Figs. T25, E3). Collectively, these oceanic and atmospheric anomalies reflect a continuation of ENSO-neutral conditions.

 

For 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


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