My greener friends are increasingly troubled by the lack of a rise in recent global surface temperatures. Using monthly data measured as the departure from long-term averages, there’s been no significant warming trend since the fall of 1996. In other words, we are now in our 17th year of flat temperatures.
Since 1900, the world has seen one other period of similar temperature stagnation (actually a slight cooling) that lasted for 30 years and ended around 1976. The current one is happening with much more putative warming “pressure,” because the atmosphere’s carbon-dioxide content is much higher than it was in mid-century.… Seguir leyendo »