<
https://www.popularmechanics.com/science/environment/a60819842/50000-year-old-block-of-ice/>
"A favorite refrain among the dwindling number of climate deniers is that
increases in temperature and carbon dioxide levels are a natural part of the
Earth’s atmospheric cycle. And while the planet has certainly seen some rise
and falls in both of those metrics over thousands (and even millions) of years,
what the planet is currently experiencing far outstrips nearly everything that
has come before.
In a new study published this week in the journal
Proceedings of the National
Academy of Sciences (PNAS), scientists from Oregon State University identified
the fastest natural rates of CO₂ rise over the past 50,000 years. To do this,
the research team tapped into bubbles of air trapped in West Antarctic Ice
Sheet Divide ice core that essentially preserved the delicate balance of gasses
present in Earth’s atmosphere at the time of their icy entombment.
The team had to drill some 2 miles deep to get enough ice to study a 50,000
year time span. After conducting an extensive chemical analysis, the
researchers discovered just how extreme and outlier the current rising CO₂
levels fueling our current climate crisis are compared to the rest of Earth’s
recent geologic history."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
