They can get air bubbles trapped in ice cores. They can date the ice cores very very accurately. So they measure the carbon dioxide in a section of ice and then date the section to get the carbon dioxide in the air from x thousand years ago. that number varies over time.
Good info. Thanks for explaining.
So, if it’s “accurate”, NOAA has admitted we haven’t been this high since 798,000 b.c. Armageddon has lasted over 800,000 years!
Paging Jerry Bruckheimer. Please pick up the white courteousy phone...
Can they really? By what standard and by what means? The "standards" of course meaning the artifically determined "standards" that were created to substantiate a predetermined hypothesis...........
So they measure the carbon dioxide in a section of ice and then date the section to get the carbon dioxide in the air from x thousand years ago.
Oh boy, I could say more but I think you're now pulling our leg..............
Ya had me there fer a second...........
From what I have heard, after a few hundred years the ice core layers get paper thin from compression. After that they use techniques such as bouncing lasers off of dust particles, electrical conductivity and other techniques. Analyzing this data, unfortunately, involves a lot of subjectivity and assumptions.
...and then, inconveniently, find out that temperature change precedes CO2 change by roughly 800-1200 years - destroying the entire AGW “theory”
CO2 is a harmless, odorless and invisible gas. Adding trace amounts to the trace amounts does noting.