By Gary Berg-Cross
You can see and example of how particular issues, often statistical in nature, get resolved such as how much warming is going on in Antartica see- On Edge-Pushing Statistics and Climate Basics. Statisticians like Noel Cressie have directly investigated "Uncertainty
Quantification for Regional Climate Projections in North America" by studying the various model projecting temperature change that is projected for North America 30 years in the future (2041-2070). Regional Climate Models (RCMs) projections are run up to 60 years into the future for "small", 50 km x 50 km regions in North America.
The results including degrees of uncertainty are analyzed statistically for all regions and all four Boreal seasons. The preponderance of results throughout all of North America, as shown in the pinkish figures below is one of warming, usually more than 2°C (3.6°F). As Cressie asked, "is this hot enough for you."
OK so there is converging and ever increasing evidence and a scientific consensus on climate change exists. What about regular citizen's beliefs? It's a function in part of macro weather. Following a winter of record snowfall in 2010, the public’s acceptance of climate change fell to a low of 52 percent, according to the National Survey of American Public Opinion on Climate Change (as published by the Brookings Institution). After 2011's mild winter, support jumped to 65 percent. Still fewer think it human caused. 2012 polling conducted by the Pew Research Center suggests that a greater number of people in the U.S. are accepting the reality of climate change. 67 percent of Americans said that there is now "solid evidence" that average global temperatures have been rising in recent decades. That's a gain of 4points over 2010 and 10 points since 2009. Yet only 42 percent say this warming is "mostly caused by human activity," according to Pew.You know, the climate always changes.. Maybe we'll have an ice age...
Noel Cressie ergional models of climate change: http://www.stat.osu.edu/~sses/collab_warming.html