Earth warmed more than we thought last century

摘要

AN OVERSIGHT in historical weather records means we underestimated how much the climate warmed in the past century or so. The finding means we are 0.1℃ closer than we thought to passing the internationally agreed absolute upper limit of 2℃ of warming. The problem stems from where the first weather stations were set up. Most early measurements come from Europe, the US and regions along trade routes - around 20 per cent of Earth's area, says Rasmus Benestad at the Norwegian Meteorological Institute in Oslo.