I have heard that magnetic north is shifting to the west at a rate of 10 miles per year, is this true? and if it is, isn't this contributing to the artic cap thawing and dumping millions of gallons of fresh water into the Atlantic Ocean, disturbing the oceans' current?
Don't follow your reasoning here, at all. Why do you imagine the location of magnetic North would have such an effect? The poles are cold because they get less intense energy from the sun.