Despite the apparent bias of many climate researchers, they do have one thing right; carbon levels have risen notably over the twentieth century from about 300 ppm to 375 ppm. While still far from the estimated levels of around 3,000 ppm during the time of the dinosaurs (appr. 150 MYA), the rising levels do mark a legitimate trend. However, there is increasing evidence that the rising carbon, contrary to alarmist reports is actually having remarkably little effect on global temperatures.

A new study authored by Susan Solomon, lead author of the study and a researcher at the National Oceanic and Atmospheric Administration in Boulder, Colo. could explain why atmospheric carbon is not contributing to warming significantly. According to the study, as carbon levels have risen, the cold air at high altitudes over the tropics has actually grown colder. The lower temperatures at this “coldest point” have caused global water vapor levels to drop, even as carbon levels rise.

Water vapor helps trap heat, and is a far the strongest of the major greenhouse gases, contributing 36–72 percent of the greenhouse effect. However more atmospheric carbon has actually decreased water vapor levels. Thus rather than a “doomsday” cycle of runaway warming, Mother Earth appears surprisingly tolerant of carbon, decreasing atmospheric levels of water vapor — a more effective greenhouse gas — to compensate.

Describes Professor Solomon, “There is slow warming that has taken place over the last 100 years. But from one decade to another, there can be fluctuations in the warming trend.”

The study was published in the prestigious journal Science.