What immediate global effect did the material ejected by the K-Pg impactor cause?

Answer

A global blanket blocking sunlight, causing an 'impact winter'

Material ejected into the atmosphere following the K-Pg impact blocked sunlight for months or years, resulting in a sharp, sudden cooling phase termed an 'impact winter,' which crippled photosynthesis.

What immediate global effect did the material ejected by the K-Pg impactor cause?
biologyextinctionGeologycause