this post was submitted on 19 May 2024
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How do we know there was a storm a millennium ago, and even its measurements?
Trees!
Trees store lots of environmental and atmospheric data in their trunks. When they get fossilized a lot of that information remains intact.
Also, ice cores. Layers of ice protect previous layers of ice from further contamination, so are a pretty good snapshot of the environment/atmosphere at a given point in time.
https://www.bbc.co.uk/newsround/67074940
Wiki has more detailed information on how Miyake Events are "stored" in trees and ice cores.
https://en.m.wikipedia.org/wiki/Miyake_event
Thank you!
See Miyake event.
As with any fossils, through the study of radioactive isotopes such as C-14.