Torrid times
the average temperatures have gone up more during the last century than at any other period during the past 1,200 years, claims a recent study by researchers from the Climatic Research Unit at the University of East Anglia in the uk.
The scientists Tim Osborn and Keith Briffa tracked and analysed temperature data from the year 800 to 1995 for 14 spots in Canada, Greenland, Belgium, Sweden, Mongolia and other countries in the Northern Hemisphere.
While the temperature figures were available from 1856, the scientists used indirect evidence for estimating the data from the year 800 to 1856. The research team gathered climate change data from long-life evergreen trees in Scandinavia, Siberia and the Rockies, which had been cored to reveal the patterns of tree rings