Are you dreaming of a white Christmas? It’s pretty rare in the Southeast, but other parts of the country have also struggled to see one in recent years. Seth Borenstein of AP posted a story this week describing the lack of snow in other parts of the country. You might think it was related to greenhouse warming, but it is actually tricky to blame global warming alone because snow is caused by a combination of cold weather and available moisture, and anything that is a combination of temperature and precipitation is tough to assign just to the warmer temperatures we are seeing. The article describes some of the considerations that scientists need to take into account and talks about the trend across the U. S.
