Editing Nuclear winter (section)

=== 1990 ===
In a 1990 paper entitled "Climate and Smoke: An Appraisal of Nuclear Winter", TTAPS gave a more detailed description of the short- and long-term atmospheric effects of a nuclear war using a three-dimensional model:<ref name="autogenerated1">{{cite Q|Q63169455}}</ref>

First one to three months:
* 10–25% of soot injected is immediately removed by precipitation, while the rest is transported over the globe in one to two weeks
* SCOPE figures for July smoke injection:
** 22&nbsp;°C drop in mid-latitudes
** 10&nbsp;°C drop in humid climates
** 75% decrease in rainfall in mid-latitudes
** Light level reduction of 0% in low latitudes to 90% in high smoke injection areas
* SCOPE figures for winter smoke injection:
** Temperature drops between 3 and 4&nbsp;°C

Following one to three years:
* 25–40% of injected smoke is stabilised in atmosphere (NCAR). Smoke stabilised for approximately one year.
* Land temperatures of several degrees below normal
* Ocean surface temperature between 2 and 6&nbsp;°C
* Ozone depletion of 50% leading to 200% increase in UV radiation incident on surface.