How does volcanic effect in the atmosphere?

Volcanic eruptions release large amounts of sulfur dioxide and ash into the atmosphere. The sulfur dioxide can react with water vapor to form sulfuric acid aerosols, which can scatter sunlight and cool the Earth's surface. However, the ash particles can also absorb sunlight and contribute to warming. The overall effect of a volcanic eruption on the atmosphere depends on the specific gases and particles emitted, as well as the eruption's intensity and duration.