Some skeptics have claimed that these projected amounts of warming have not been borne out in the surface temperature changes over the past decade.Â But there are many factors which impact short-term global temperatures, which may conceal the long-term warming caused by increasing atmospheric CO2.Â So if we want to know if the IPCC projections are realistic, rather than examining noisy short-term temperature data, we should examine how much atmospheric CO2 is increasing.
Some skeptics have claimed that these projected amounts of warming have not been borne out in the surface temperature changes over the past decade.Â But there are many factors which impact short-term global temperatures, which may conceal the long-term warming caused by increasing atmospheric CO2.Â So if we want to know if the IPCC projections are realistic, rather than examining noisy short-term temperature data, we should examine how much atmospheric CO2 is increasing.