This paper reveals new evidence that in both the Medieval and the Roman warm periods Arctic sea ice began to melt two months earlier than now. Scientists have determined that today’s Arctic sea ice concentrations are still much higher than they have been for most of the last several thousand years, undermining claims that modern era Arctic sea ice changes are remarkable, unusual, or unprecedented.
via climate science
August 19, 2018 at 01:30AM
Iowa Climate Science Education 