Mars polar caps?

Question

What causes the seasonal change in size of the Martian polar caps? I'm clueless
also, during what season would the largest amount of dry ice be present at the polar cap.

Answer 1

There is more ice in winter of course. But that is winter on Mars, not on Earth. The seasons on Mars are influenced both by the eccentricity of its elliptical orbit, which is much more eccentric than Earth's orbit, an the tilt of the Martian rotation axis, which is very similar to Earth's tilt. On Earth the tilt dominates the seasons, because Earth's orbit is only slightly eccentric.

Answer 2

It depends..