Carbon dioxide levels in the Earths atmosphere have soared to a new high, one never before been seen in human history, researchers announced as temperatures near the Arctic circle rose into the 80s.

Temperatures in Arkhangelsk, Russia, a coastal city along the White Sea, hit 84 degrees Fahrenheit on Saturday. That citys average high for this time of year is around 54 degrees, The Washington Post reported .

This astonishingly warm temperature wasnt isolated to Arkhangelsk, however. Koynas, located east of the city, saw temperatures rise to 87 degrees. One city in eastern Finland also saw the mercury hit 77 degrees on Saturday, a seasonal high for the country thus far.

These alarmingly warm temperatures came as a daily CO2 reading by atmospheric researchers on Saturday recorded a 415.26 parts per million (ppm) baseline. Its the first daily baseline to top 415 ppm in mankinds history, the researchers with San Diegos Scripps Institution of Oceanography said.

Not just in recorded history, not just since the invention of agriculture 10,000 years ago, Eric Holthaus, a meteorologist and writer for the non-profit environmental magazine Grist, emphasized on a Twitter post. Since before modern humans existed millions of years ago.