These tests were all tweaked for low fallout though, with artificially reduced yields. And many were air bursts that are less bad because they don't throw a wh

These tests were all tweaked for low fallout though, with artificially reduced yields. And many were air bursts that are less bad because they don't throw a whole lot of soil into the air. A lot of the multi megatonne ones in particular. They weren't simulating actual attack scenarios with those as they were so overpowered there'd be no point. It was just a big dick measuring contest at that point. I think the Soviets won with their Tsar Bomba and I guess the US wasn't willing to escalate it further. But yeah I think most of the nuclear winter scenarios were based on massive conflict with those multi megatonne bombs which are no longer in use.