Some are of course external —
large volcanic eruptions block incoming solar radiation from reaching and being absorved by Earth's surface.
Not exact matches
Large volcanic eruptions eject sulfur dioxide, which rapidly forms tiny particles in the air known as «aerosols» that
block sunlight.
Other factors that could adversely impact the correlation between the sun and temperature include time lags in the transposition of a climate impulse, or cooling events through sun -
blocking aerosols from
large volcanic eruptions.