What happened here?
this post was submitted on 08 Feb 2025
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Nah that's fair, and I certainly have no idea what I'm talking about either. But my understanding is that "ice core data" is a compilation of data from various ice core sampling, including those 'lowest accumulation sites' where they're saying you can only measure to the precision of centuries.
Again, I don't know, but I'm assuming we don't have "high accumulation" ice core data for all of that history, so jumping 100+ ppm for a few decades and then falling again wouldn't necessarily show up in those low accumulation sites.