to alder24: thank you for your answer;
You bring up a good point about the geological timescale, and I do agree that 1,000 years might not seem like a very long time from that perspective;
Still, for me,
the idea that 1,000 years wouldn’t be enough time to cause significant warming. While the immediate effects of ash from the Ashmounts would definitely lead to rapid cooling, the greenhouse effect could begin to take hold over the course of a few decades as volcanic gases, especially CO₂ and methane, build up in the atmosphere. Although 1,000 years may seem short, it’s long enough for the gases to accumulate and for the warming trend to become noticeable, especially if Rashek’s design didn’t fully limit the release of those gases.
So, while the Ashmounts were primarily intended to produce ash and limit sunlight, I think it’s still possible that after several centuries (perhaps even as early as 1,000 years), the buildup of greenhouse gases could have started to trigger warming. While the eruptions over 1,000 years may not be on the same scale as the Siberian Traps, the cumulative effect of these gases could still lead to a significant greenhouse effect by the end of that period.
But hey, we’re enjoying a fantasy book, not a scientific one, so I’m pretty okay with the author’s POV and yours ! Journey before destination!!!! THANK YOU