• Public

  • Public
  • Network
  • Groups
  • Popular
  • People

Temperature reconstruction over the last 24,000 years. The 8000 years before the industrial age the temperature was quite constant. We only look at changes in time and this period has a temperature "anomaly" of about zero. An anomaly is a deviation from a default state. Before that (the period of 18,000 to 8,000 years present) you see about 10,000 years with 8°C of warming as the Earth is coming out of an ice age. The earliest period (24,000 to 17,000 years old) the temperature anomaly declines from -6 to -8°C. Since the start of the industrial age, the Earth has warmed about 1°C. The (no longer likely) high emissions scenario warms another 6°C in 2100. The low emissions scenario warms a bit more than one degree Celsius more. On this scale with a temperature anomaly of -8°C to over 6°C the slight warming over the 8000 years before the industrial period looks mostly flat. So we see a really straight hock stick handle and then a steep rise. This graph looks even more like a hockey stick than the previous graphs called a hockey stick.