Nuclear winter
A nuclear winter was a planet-wide alteration of the climate, usually as the result of a nuclear war or other major events.

Earth experienced nuclear winters in the 21st century after World War III. ()

When Terralysium's outermost ring destabilized in 2257, radioactive debris threatened to bombard the planet and trigger a nuclear winter. The threat was averted by the , which used the gravity of a dark matter asteroid to drag the debris away from the planet. ()

In 2368, an asteroid impacted on Penthara IV, which threatened to cause a nuclear winter, but the  was able to prevent such a disaster. ()

The Vaadwaur homeworld suffered from a nuclear winter, after massive orbital bombardment, from 1484 until at least 2376. () 

Otrin's homeworld experienced a nuclear winter, due to a containment accident in its power grid, from the late-23rd century until 2378 when the  neutralized the antimatter radiation. Harry Kim noted that it wouldn't have taken that many warheads to cause such an event. ()

See also
Nuclear holocaust

External link
 

de: Nuklearer Winter
Meteorology