The reason I mention this is because we have to have overlapping means of explainging broad ranges of things. There is no single temp proxy that will show you the entirety of earth's climate history. You WILL HAVE TO COMPARE and OVERLAP proxies.
And there's your problem in understanding the LIMITATIONS of proxies to explain ANYTHING. You cited a few of RARE chances to have a proxy study.
In those INDIVIDUAL proxies of varying temps -- SOME are technically inherently MORE accurate than others. So you can FIND an individual proxy at SPECIFIC geolocation that WILL SHOW the variance in temperature and CO2 to a much greater degree for events LESS than 500 yrs in time scale.
But when you PURPORT to be doing a GLOBAL "mean temperature" proxy study and you combine (and sometimes CHERRY PICK) a basket full of different proxies from LESS THAN 100 locations on the planet -- You are NOT measuring GMASTemperature to any degree that even APPROACHES our modern instrumentation.
And if you FRAUDULENTLY combine that flawed result with MODERN instrumentation records -- you are DECEPTIVELY pushing a narrative -- NOT doing science.
That's what the 800,000 yr CO2 graph at Climate.gov is. Straight up FRAUDULENT misrepresentation of the data and the science to preach the FAITH of GW to the masses. The Vostok Ice Core studies are very LOCAL and low information proxy information that doesn't have a CHANCE of finding Max Min temps except as 1000 yr averages.
The ONLY reason you know anything about the ancient earth's climate is because of these proxies.
If you don't like proxies or their limitations then you have to give up all knowledge of the earth's past climate. As such you cannot say ANYTHING about climate.
I've TOLD you what they mean. They have a minor value that is misrepresented to the media/public. It would be like an alien spacecraft arrived BEFORE the ice ages and left an advanced reporting station at Vostok (e.g.) And almost a million years later -- some team finds that data and runs a 1000 yr LOW PASS FILTER over the results.
It's VALUE is as a LONG TERM MEAN of the parameters that you want to measure. And dont accuse me of NOT SAYING THIS 100 times in the forum or at LEAST 3 times in this one thread.
I also pointed out that SOME proxies (preserved leaf/pollen samples sometimes found in amber e.g.) have amazing time resolution. The Greenland ice cores (see GISP 2 and 3 studies) show more than 1 DegC temp rise in a matter of a couple years !!!!
But when you LIE about doing this on GLOBAL SCALE for periods of time exceeding a few thousand years -- with about only 70 spatial samples NOT covering the globe - and MISREPRESENT the inherent limitations of the DATA to the media/public -- you've LOST your credentials to "science".
What, exactly, do you think that means.
The ancient carbon you are talking about (coal and oil) comes mostly from algal and plant and bacterial stuff. It selectively fixes lighter Carbon isotopes. Yeah, it's a fingerprint when we burn it that the CO2 in the atmosphere becomes dominated by lighter C isotopes.
Not at the RATE we put it in the atmosphere.
NOPE. Not even listening to what I asserted. ANCIENT carbon is ancient carbon. And since man only puts up year 5% of what comes from nature every year, the ancient carbon coming OUT of the NATURAL 95% is significant. And it comes primarily from sequestration in the oceans.
THE RATE that we put it up is also 5% of the RATE that that Nature sources/sinks every fucking year. And even today -- 40 years into this circus of the absurd -- Nature SINKS slightly less than HALF of the ANCIENT carbon back into the land/sea. It's all fungible once it's UNsequestered.
If ancient METHANE bubble up from HUNDREDS of seeps in the Gulf of Mexico -- IT HAS THE SAME DAMN FINGERPRINTS !!!!!
That "fingerprint method" would be toss out of any court of law.