ENSO forcing match against digitized LOD variation
![](http://imageshack.com/a/img924/2977/ii7X3w.png)

I took the correlation coefficient of this and its above 0.7. For the cycle factors applied, the fit doesn't get much better if the phases and amplitude are allowed to vary -- the correlation coefficient go up by a slight 0.02, and it reduces the ENSO fit only slightly.