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But your claim was that abrupt warming has never occurred before.Right. And a cooling that took thousands of years afterward. However, NONE of those events was caused by the combustion of fossil fuels or even by vulcanism. They were all caused by Milankovitch cycles reducing solar irradiation to the planet; something that is NOT happening at the present.Each of the 25 observed D-O events consisted of an abrupt warming to near-interglacial conditions that occurred in a matter of decades.The point, dummy, is that each event had a drastic change in temperature up and down from glacial to interglacial temperatures and from interglacial to glacial temperatures over the course of a few decades. These were 8C swings. So the claim you are making is false. And that doesn’t even address the reality that no one from the IPCC believes there will be an 8C increase in temperature over a period of a few decades.D-O events leave you in an interglacial period, not a glacial period. You might want to look up the difference.Twenty five Heinrich and Dansgaard–Oeschger Events during the last glacial cycle and the oxygen isotope curve say otherwise.As I have said here repeatedly, it is the rate of change in the current situation that is going to tear us a new asshole. A ten degree change is nothing to sweat about if it takes place over 100,000 years. But that's not what's happening right now, is it.
Heinrich and Dansgaard–Oeschger Events | National Centers for Environmental Information (NCEI) formerly known as National Climatic Data Center (NCDC)
Repeated global climate fluctuations during the last glacial period were possibly related to freshwater releases from land-based ice sheets.www.ncdc.noaa.gov
Read your source material again. They did NOT change from interglacial to glacial in a matter of a few decades.
Each of the 25 observed D-O events consisted of an abrupt warming to near-interglacial conditions that occurred in a matter of decades.
It is unprecedented in human history and the current warming trend has no parallels with past warming events. None.