I’d look at a cessation of under-Atlantic volcanic activity, which would be like turning off the oven.
Predictors also point to more than normal dust blowing west off of Africa, sucking up moisture in the air. Satellite imagery seems to validate that, but I can’t attest to the accuracy of those images.
That would be a bad thing.
chiller....So Perhaps some of the undersea hot near surface magma has been emptied out in southwest Iceland eruptions, leaving the sea floor a bit cooler and this resulted in less heat transferred to the ocean surface?
Or, perhaps this year's multiple volcanic eruptions, including the Rara Tonga eruption, put a lot of water and particulate in the upper atmosphere which resulted in more clouds which block light from the ocean surface and a lower surface temperature.
Or, it could be both or both and something else. (Do you know how to write a research grant?)
The late A.J Strata, who was a NASA scientist as well as a blogger, found that satellite data in the Pacific suggested el Ninjo is caused by underwater volcanoes. I told him he should write an academic paper on his findings but he didn’t have the inclination to do it.
I sort of think a lot of the weather is influenced by volcanoes in the ocean