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

Zonal Wind and Temperature Anomalies

MARCH 2018

FIGURE T3.  Five-month running mean (solid lines) and individual monthly mean (dots) of the 200-hPa zonal wind anomalies averaged over the area 5N-5S, 165W-110W (top), the 500-hPa virtual temperature anomalies averaged over the latitude band 20N-20S (middle), and the equatorial zonally-averaged zonal wind anomalies at 30-hPa (red) and 50-hPa (blue) (bottom). In the top panel, anomalies are normalized by the mean annual standard deviation. Anomalies are departures from the 1981-2010 base period means. The x-axis labels are centered on January.