Tropical Highlights

  Table of Atmospheric Indices  (Table 1)

  Table of Oceanic Indices  (Table 2)

  Time Series

• SOI, Tahiti/Darwin SLP & OLR  T1
  
• SOI & Equatorial SOI  T2
  
• Zonal Wind & Temperature  T3
  
• 850-hPa Zonal Wind  T4
  
• Nino region SST indices  T5
  

  Time-Longitude Sections

  Mean and Anomaly Fields

  Appendix 1: Outside Contributions

Nino region SST indices

SEPTEMBER 2011

FIGURE T5.  Nino region indices, calculated as the area-averaged sea surface temperature anomalies (C) for the specified region. The Nino 1+2 region (top) covers the extreme eastern equatorial Pacific between 0-10S, 90W-80W. The Nino-3 region (2nd from top) spans the eastern equatorial Pacific between 5N-5S, 150W-90W. The Nino 3.4 region 3rd from top) spans the east-central equatorial Pacific between 5N-5S, 170W-120W. The Nino 4 region (bottom) spans the date line and covers the area 5N-5S, 160E-150W. Anomalies are departures from the 1981-2010 base period monthly means (Smith and Reynolds 1998, J. Climate, 11, 3320-3323). Monthly values of each index are also displayed in Table 2.