yes volcanoes can be a big factor in climate, which the global warming folks never discuss.
As I recall, in 1991, Mt. Pinatubo in the Philippines spewed far more pollutants into the atmosphere, than anything produced by man’s activities. And if I recall correctly, global temps actually cooled a bit at that time, as so much particulate matter from Mt. Pinatubo spread out into the atmosphere worldwide. The particulate matter created a haze of sorts, which led to reduced temperatures.
It remains to be seen if the Hawaii and Guatemala eruptions will have anywhere near that impact.
I believe that they figured that eruption in 10 minutes, put more into the air than the entire world does in 3 years. And it went on for how long?
I remember Pinatubo well.. we received 100s of evacuated airmen from Clark AB onto Homestead AFB (Miami)..
Yes, there have been situation in earth’s geologic history when you have a lot of volcanoes relatively close together both in time & in geography. I had a geology professor call them “Volcano (or Volcanic) Storms”. (Now in my dotage I can’t remember exactly what term he used “volcano or volcanic”). I think the “Permian–Triassic extinction event” might be the best example.