Much of those tests were done over deserts or islands surrounded by water. A key part of the nuclear winter prediction is predicated on large scale fires.
There might, or might not, be "large scale fires" after a nuclear exchange. Regardless, "nuclear winter" is predicated on debris being injected high into the atmosphere, which will happen if lofted by the fireball, but not just from a regular fire.
5 comments
[ 2.9 ms ] story [ 27.3 ms ] threadIt's also worth mentioning that air burst detonation will suck up virtually no debris from the surface, and also produces very little fallout.
There's a lot of good information at this site: http://www.nuclearsecrecy.com/nukemap/