All these phenomena are related via forcing stemming from lunar gravitational effects

Look at intervals that show excursions marked by red X, like around 1983:
![all](http://imageshack.com/a/img923/9113/dZWJCe.png)

The LOD is the most direct measure of a sporadic angular momentum change in the earth's rotation. Perhaps this is related to the El Chichon volcanic eruption in 1982. For QBO and ENSO, the model also showed transient deviations from the data.