It's literally made up. Any particulates that enter the atmosphere will precipitate with the rain that they'll cause. We've had huge explosions which launched tons of particulates into the atmosphere in the past, they all came back to earth before they could cause any minor cooling effects. Same goes for massive fires, like forest fires or firebomb attacks.

All the studies use stratospheric volcanic plumes as the basis for the model, because they didn't have data on stratospheric fire plumes to use. When they got fire plume data, it turns out it has drastically lower cooling capabilities, because it's ash rather than pulverized rock and it lacks the gasses that are only present in volcanic eruptions, which have a significant cooling effect.

I've read what the CIA said about it at the time. They said the Soviets realized it was bullshit at the time but in public they pretended it was real because it would help them in the Euromissile bullshit. Getting r-slurred eurotrash to protest against Pershing II and GLCM because... America is the problem not the people who are making missiles to nuke you.

I dunno I'm not a tard whisperer so I only get asians.

Sagan was the best at pop science shit, like sitting down with UFO nuts and respectfully telling them why they're wrong. But Nuclear Winter was a pious fraud where he thought he had to lie to the public to stop Ronald Reagan from starting WW3. That was totally fricking ludicrous as we saw when the Cold War ended on extremely generous terms to the Russians.

You have a friend in burgerland if you ever need a place to hide