The last time, today's warming rate happened was during deglaciation, see ice core from Greenland.
It was so fast that the AMOC stopped. Which also re-froze Scotland and Scandinavia for a while. Scotland was a wall of ice 800 m tall!
But the Earth's orbital cycles drove further warming, #AMOC restarted – and our stable #Holocene began.
The chart shows decadal average temperature in °C from Renland in East Greenland and a short contemporary time series from a weather station 600km further North at the coast in Danmarkshavn. To visualise the similar warming rates a little better, Danmarkshavn's data was copied in at the 2 previous periods of fast rising temperatures in Renland.
Noteworthy: the 2 steep warming periods took about 300 years each and covered first 10 and then 8 °C. Roughly 0.33°C per decade.
While Danmarkshavn saw a rise of 0.35 per decade since 1980.
[#]Paleoclimate #Greenland
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