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Equatorial Pacific/Indian Ocean Five-Day Running Average 925 hPa Zonal Wind Anomaly Hovmoller (m/s)

Data:  NCEP/NCAR Reanalysis 925 hPa daily zonal wind (m/s) Base Period for Climatology:  1971-2000 Data Source: NCEP/NCAR Reanalysis Description:  Five-day running average zonal wind anomalies averaged over 5°S to 5°N, contoured at 1.0 m/s.  Shading starts at +/- 1.0 m/s.  Positive anomalies (anomalous westerlies) are in red, negative anomalies (anomalous easterlies) are in blue.  Longitude domain is 50°E to 80°W.  On this chart the last 120 days are shown, and time increases vertically. The vertical black line denotes 180° longitude.  NCEP is the acronym for the National Centers for Environmental Prediction; NCAR is the acronym for the National Center for Atmospheric Research