By Michael Thomas – Re-Blogged From http://www.WattsUpWithThat.com
An important aspect of the climate change debate can be summed up like this: “One position holds that medieval warm temperatures reached levels similar to the late twentieth century and maintained that the LIA was very cold, while another position holds that past variability was less than present extremes and that the temperature rise of recent decades is unmatched”. This video challenges whether the rise of recent decades is unmatched.
The overall trend since 1880 when instrumental data started is 0.11 degrees Celsius per decade. This is according to NOAA data for northern hemisphere land records. The most extreme trend occurs between 2006 and 2016 and is, according to NOAA, is 0.38 degrees Celsius per decade.
Eight separate studies of historical data, all of which are referenced by the IPCC in the 2013 report, are examined to see whether the trend between 2006 and 2016 is indeed unmatched over the past two thousand years.
Multiple examples were found where trends equaled or exceeded over the past two thousand years.