You can term global warming or global climate change or whatever you prefer to term it. I am of firm belief that it exists and has already made significant weather change in MN, and broader worl wide. If I recall right, the last little ice age, occurred due to only a 2.5 degree change/drop in temp due to a large volcanic eruption.
People have been golfing in December, January and February at times the past 5-6 years in MN. 15-20 years ago, that would not have been a thought let alone a possibility with longer stretches of below zero temps and inches upon inches of snow.