Cave Deposits Reveal a Permafrost-Free Arctic

[alanw]

Cave Deposits Reveal a Permafrost-Free Arctic - Eos

Mineral cave deposits from northern Siberia show that the region was permafrost free during the late Miocene period, when Earth was warmer than today.

eos.org

 

[Karstic]

Thanks for sharing!
Given we’re reached atmospheric CO2 concentrations above the average Miocene pCO2 … and are most likely to far exceed those once feedbacks start kicking in … it’s a potent reminder of the strange future ahead