Niño 3.4 SST Anomaly and Equatorial Central/Eastern Pacific 925 hPa Zonal Wind Anomaly

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Zonal Wind Data:   NCEP/NCAR Reanalysis Monthly 925 hPa Zonal Wind on a 2.5° x 2.5° lat/lon grid
Base Period for Zonal Wind Anomalies: Jan 1971-Dec 2000
Nino 3.4 Sea Surface Temperature Data:  NCDC Extended Reconstructed Version 2 Monthly SST Anomalies on a 2.0° x 2.0 ° lat/lon grid
Base Period for SST anomaly: Jan 1971-Dec 2000
Data Source: NCEP, NCDC


Top: The red line represents the Niño 3.4 standardized sea surface temperature anomaly, and the blue line represents the standardized 925 hPa zonal wind anomaly averaged over the eastern and central equatorial Pacific Ocean (5°S-5°N and 150°E-90°W) for the last five years. A three-month running average is applied to both time series.

Bottom: The bottom plot is the same as the top, but for the past 25 years.

  NCEP is an acronym for the US National Centers for Environmental Prediction.