Nuclear winter is a severe and prolonged global climatic cooling effect that is hypothesized [1] [2] to occur after widespread firestorms following a large-scale nuclear war. [3] The hypothesis is based on the fact that such fires can inject soot into the stratosphere, where it can block some direct sunlight from reaching the surface of the Earth.

2025年1月21日 · Nuclear winter, the environmental devastation that certain scientists contend would probably result from the hundreds of nuclear explosions in a nuclear war. The damaging effects of the light, heat, blast, and radiation caused by nuclear explosions had long been known to scientists, but such

2023年8月28日 · As scientists researched the possible ramifications of such a conflict, a new term entered the public vernacular: nuclear winter. If the sight of a mushroom cloud burning above the horizon suggests that the world might end with a bang, then nuclear winter presents the notion that post-World War III humanity might very well die with a whimper.

2019年8月20日 · The simulations have been run, and it's official: even today, a nuclear war between the US and Russia would plunge the planet into a nuclear winter, with clouds of soot and smoke covering the planet. Globally, temperatures would plunge by around 9 Kelvin (9 degrees Celsius or 16 degrees Fahrenheit) on average, due to the lack of sunlight ...

When nuclear winter theory was first developed in the early 1980s, at the height of the nuclear arms race, the world had more than 50,000 nuclear weapons. Now, with the Cold War over, the US and Russia are reducing their nuclear arsenals.

2024年5月23日 · Nuclear winter is a hypothetical scenario in which a large-scale nuclear war would result in prolonged global cooling, reduced precipitation, and decreased sunlight, leading to widespread agricultural collapse and possible mass starvation.

Since the early 1980s, the world has known that a large nuclear war could cause severe global environmental effects, including dramatic cooling of surface temperatures, declines in precipitation, and increased ultraviolet radiation.

2022年8月15日 · “In a nuclear war, bombs targeted on cities and industrial areas would start firestorms, injecting large amounts of soot into the upper atmosphere, which would spread globally and rapidly cool...

When combined with the prompt destruction from nuclear blast, fires, and fallout and the later enhancement of solar ultraviolet radiation due to ozone depletion, long-term exposure to cold, dark, and radioactivity could pose a serious threat to human survivors and to other species.

2018年5月18日 · Nuclear winter is a global climate event predicted in the 1980s by some scientists: after a nuclear war (the theory goes), prolonged, worldwide cooling and darkening would be caused by sunlight – blocking smoke and soot entering the atmosphere.