Can you help? #Followerpower
The paper to this dataset
https://doi.pangaea.de/10.1594/PANGAEA.972389
doesn't explain why they analyzed calcium.
It's a dataset with several proxies for fire emissions from the Swiss Alpes for 1000-2000 AD.
I have come across SO4 and Nxx as typical fire emission and proxy for #paleo or historical fires.
But not Ca+.
2 peaks really stand out, shortly before the #BlackDeath outbreak in 1349 and shortly before the Nazis started to gas and burn their victims.
So I'm thinking, the dating in the dataseries is off by ~5 years, and it is really human bones that burned and caused the Ca+ peak.
What do you think?
The paper contains a map of Europe showing where from the wind will have swept those chemicals onto the glacier. Basically all of mainland Europe, except the most Northern and most Southern parts.