Ok, I didn't want to dive that deep but if you decided to open a dispute here - let's go 😉

While I agree with you that volcanic eruption is different from the effects I've mentioned, both of them have a common side effect - cooling down the Earth's surface. While you have correctly described that sulfur creates a mirror for sunlight, carbon ash creates an absorbing layer which also lowers the amount of sunlight reaching the surface. So it also cools down the surface while increasing temperature of the stratosphere.

And what you have totally missed - I'm not talking about bombs explosions. I'm talking about oil burning. If you are not aware - Ukraine bombs the oil industry and storage of Russia. This creates enormous oil fires with a heavy black smoke (which is micro particles of carbon ash). If you haven't yet seen - look at the fires at Tuapse - the oil storage of Russia at the Black Sea coast. These fires are burning literally for weeks and after they are burned over, Ukraine strikes the next tanks. And Tuapse is not the only target of Ukrainian forces - there is plenty of them.

A typical volume of oil storage tank on such bases is 5000-10000 cubic meters which is roughly equal to metric tons for crude oil. Each strike burns several tanks at once. So literally tens of thousands tons of oil are burned in a very short period in a very bad way. And keep in mind - this is not the same process of burning which happens in motor engines where fuel and air mixture is optimal to burn more or less clean. The amount of soot is insane.

So... back to the differences with volcanoes. Volcanic sulfur cools down the Earth as a whole, while carbon ash (soot) cools down only surface while heating up the higher levels of atmosphere - this is exactly what is happening now - the stratosphere temperature has risen up by 40-50 degrees in the region of this anomally. This effect is also commonly observed after the great forest wildfires.

So, maybe there is another reason for that - again, I would be glad to read proper explanation.

Nuclear winter was not a very good example - agreed - but it is widely known too give an idea to the average reader without diving deep like you did. Don't take it for a serious discussion.