The Post-Partisan Emporium

Greenland’s climate changes are remarkably uncorrelated with climate model expectations and changes in atmospheric CO2 When CO2 levels were in the mid-200s parts per million (11.7 to 4.5 thousand years ago) the Arctic and northern Greenland were 2-4°C warmer than now, ice margins were 80 km behind today’s, ice-free open water conditions prevailed, and Greenland warmed 10°C in just 60 years ( Elnegaard Hansen et al., 2022 ) In the last two decades, as atmospheric CO2 has increased by 25 ppm, Greenland warming “is not evident” ( Matsumura et al., 2022 ). Instead, temperature stations document cooling trends. Image Source:  Matsumura et al., 2022 Past interglacial CO2 levels of only 280 ppm were associated with a “nearly ice free” Greenland and the presence of flora and fauna in subarctic terrestrial environments 1000 km northwards of where they can survive today, implying “at least 5°C higher temperatures” ( Bennike and Böcher, 2021 ). Summer sea water temperatures were as much as “7-8°C