| Mars is a radically different planet and has its own climate. It doesn't have anything to do with the sun getting warmer though, e.g. we can't blame the sun for the Earth warming up just because Mars is also warming up. A few of the key differences off the top of my head: - The polar caps of mars are mostly frozen CO2 ("dry ice"), and also mostly disappear during the summer. You can see timelapse animations showing them shrinking and growing by like 90% each year. Their behavior is radically different from our frozen water ice caps, and have a huge difference in thermal mass too. - Mars has a very thin atmosphere, mostly inactive geology, and no oceans. That means it has very little in the way of thermal buffering - Mars goes through it's own Milankovitch cycles (changes in orbit eccentricity, axial tilt, precession) which means it undergoes it's own warming/cooling cycles just like earth. It happens to be in a warming cycle right now. - Enormous dust storms can take over the planet for months at a time, which obviously has a huge impact on global climate - We have a very short record of observing Mars' climate, so we can't really make long term trend analysis like we can on Earth |