Enso & Temperature Anomalies

Above  is the relationship between ENSO 3.4 and temperature. I have plotted UAH records from December 1978 and the relationship (24 month moving averages) looks interestingly close. Where it diverges seems to coincide with the effects of the Mt Pinatubo cooling starting in June 1991.

The spreadsheet with the source data can be found here:

https://www.dropbox.com/s/697vn6ni1g893zw/SOI%20%26%20UAH%20Temperature%20Correlation.xls?dl=0