Proxytietolähteet
Proxytietolähteet, often translated as proxy data sources, are indirect indicators or records used to reconstruct past environmental conditions. These are not direct measurements of a variable, but rather something that has been influenced by it and can be analyzed to infer the original condition. Proxies are essential for studying climate and environmental changes over timescales that predate instrumental records. Examples include tree rings, ice cores, sediment layers, coral skeletons, and pollen records.
The principle behind using proxies relies on the observation that certain natural processes create archives that