How much Carbon does a SnowMobile give off?

I couldn’t help wondering what the carbon footprint was of the SnowMobile I hired for the day today (whilst on holiday). It was amazing fun but nonetheless I wonder what the impact was on the environment?

Did it emit less than my commute to the office would have done?

The picture below shows the trail of a chap I met on the mountain (named Trevor) who had a really powerful machine – if you look carefully you can see him towards the top of the image in the middle(laterally)