R Gates said;
‘In general though, I think the evidence is getting stronger and more persuasive that aerosols have played a big role in driving the AMO (both natural and anthropogenic), and that especially the role of volcanic aerosols is proving to be very strong in determining what goes on in the North Atlantic.’
We took Mosh for task for saying that sort of thing without cites, althoiugh to be fair he used the words ‘substantial evidence’. It was the ‘substantial’ that irritated us. 
I agree that volcanic eruptions are important, but how important we still don’t know. Would earthquakes have an effect to a greater or lesser degree and also natural fires? We get several accounts of enormous fires underground and overground. I’ve not seen much research on these aspects.
Reading through the various English contemporary observations for The Long Slow thaw I was struck by the number of times that earthquakes and auro borealis were mentioned. As you know we are not at all earthquake prone and rarely see the Northern Lights.
tonyb