According to a new Berkeley Earth study released yesterday, the average land temperature of the Earth has risen by 1.5 °C over the past 250 years, from 1753. Berkeley Earth compared the shape of the rise in temperature over 250 years to a number of variables for which data exists for the same period including solar activity and concluded that by far the best match was to the record of atmospheric carbon dioxide, measured from atmospheric samples and air trapped in polar ice.
"The good match between the new temperature record and historical carbon dioxide records suggests that the most straightforward explanation for this warming is human greenhouse gas emissions."
Together with their most recent results and papers, Berkeley Earth also released their raw data and analysis programs.
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