Nuclear Darkness

Global temperatures 1 year after 50 million tons of smoke enter stratosphere

reduced temps after war with 5 million tons of smoke
Reproduced/modified by permission of American Geophysical Union.
Temperature changes in summer (°C) following a small nuclear war (India-Pakistan Conflict)

Surface air temperature changes following the injection of 5 million tons of smoke into the stratosphere after the detonation of a total of 100 Hiroshima-size nuclear weapons in the largest cities of India and Pakistan [for the 5 Tg standard case]. Temperatures are averaged for June, July, and August of the first year following the smoke injection. Effects are largest over land, but there is substantial cooling over tropical oceans, too. The warming over Antarctica is for a small area, is part of normal winter interannual variability, and is not significant.