The Equatorial Quasi-Biennial Oscillation (QBO)

The QBO is a dominant interannual variation in the equatorial stratosphere. It is characterized as periodic variations of the easterly and westerly zonal-mean zonal wind with the period of about 2 year (e.g., Baldwin et al. 2001, Review of Geophysics).

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Zonal wind observed at Singapore

About the data

QBO index

About the index


Scatter plots of normalized PC1 and PC2 at 4-year intervals

Created: Jun. 05, 2017 by Eriko Nishimoto