A study of world temperature since the last Ice Age, published this month, shows we are in the midst of a dramatic U-turn: gradual cooling ended in the early 20th century and turned to relatively rapid warming.
The climate scientists who wrote the study say it provides further evidence that warming is caused mainly by carbon dioxide emissions since the industrial revolution, and not naturally.
The study, led by Shaun Marcott of Oregon State University and published in Science magazine, reconstructs temperature changes over the past 11,300 years. It is based on 73 sets of climate data, mostly built up from analysis of the fossils of pollen, plankton and other marine micro-organisms.
Previously, continuous temperature reconstructions only went back 2000 Read the rest of this entry »