What happens to the climate when Earth passes through interstellar clouds?

Noctilucent clouds were once thought to be a fairly modern phenomenon. A team of researchers recently calculated that Earth and the entire solar system may well have passed through two dense interstellar clouds, causing global noctilucent clouds that may have driven an ice age.

source https://phys.org/news/2024-09-climate-earth-interstellar-clouds.html