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Quasi-Biennial Oscillation


Quasi-Biennial Oscillation (QBO) NCEP Reanalysis Zonal Winds

(courtesy of


Time-Pressure section of the spatial average of equatorial (5°S to 5°N) zonal winds from the NCEP-NCAR Reanalysis data set between 100 hPa and 10 hPa for the last ten years on a 2.5 x 2.5 deg. lat/lon grid.


Red indicates west winds, blue indicates east winds.

QBO Time-height Section of Monthly Mean Zonal Winds (m/s)

(courtesy of

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