IS TEMPERATURE OF EARTH GETTING WARMER?
Sceptic Instruments show there has been some warming of the Earth’s surface since 1979, but the actual value is subject to large errors. Most long-term data comes from surface weather stations. Many of these are in urban centres which have been expanding and using more energy. When these stations observe a temperature rise, they are simply measuring the “urban heat island effect”. In addition, coverage is patchy, with some regions of the world almost devoid of instruments. Data going back further than a century or two is derived from “proxy” indicators such as tree-rings and stalactites which, again, are subject to large errors. Counter Warming is unequivocal. Ocean measurements, decreases in snow cover, reductions in Arctic sea ice, longer growing seasons, balloon measurements, boreholes and satellites all show results consistent with records from surface weather stations. The urban heat island effect is real but small; and it has been studied and corrected for. Analyses by Nasa , for
