SNIP

Might it not be that the NH SST anomalies are symptomatic rather than
causal?

Will


I rather think so.

Whilst not having a deep scientific knowledge of such things, I've had
an interest in North Atlantic SST anomalies for decades, and I have
little doubt the the prevailing synoptic situation controls SSTs
rather than the reverse.

Of course, it's not wholly one way, but just looking at ast SST
anomalies & related archived synoptic charts tells you a lot.

However, I do wonder if the large reduction of arctic ice in 2007 has
played some part in the last 3 poor (by recent standards) summers.

Graham
Penzance