Compared to climate change for the past millennium, even the smallest exchange modeled would plunge the planet into temperatures colder than the Little Ice Age (the period of history between approximately 1600 and 1850 AD). This would take effect instantly, and agriculture would be severely threatened.
In the 150 Tg case they found that:
A global average surface cooling of −7 °C to −8 °C persists for years, and after a decade the cooling is still −4 °C (Fig. 2). Considering that the global average cooling at the depth of the last ice age 18,000 yr ago was about −5 °C, this would be a climate change unprecedented in speed and amplitude
True, but it would still revert to global warming after that. Probably even way worse because a lot of the vegetation cover would be dead, so think desert weather : very cold nights and very hot days.
https://en.wikipedia.org/wiki/Nuclear_winter
True, but it would still revert to global warming after that. Probably even way worse because a lot of the vegetation cover would be dead, so think desert weather : very cold nights and very hot days.