NASA research physical scientist Luke Oman gave a presentation of research into the impact of a regional nuclear war on global temperatures and precipitation at the American Association for the Advancement of Science on February 18, 2011. Such a nuclear conflict, while less severe than a major nuclear conflict resulting in nuclear winter, would cause unprecedented climate change cooling the planet for up to ten years, and cause major famines and starvation from agricultural disruption.
Research from Japan has found that Atmospheric nuclear testing stagnated mid 20th century global warming.
