The English version of our glossary is currently under construction and will be regularly updated.
Reanalyses are created by combining extensive Earth observations with an atmospheric or ocean model through what is known as data assimilation.
With the aid of the model, incomplete observations can be used to create a spatially and temporally complete dataset that matches the reality as closely as possible and includes parameters not found in the observations. The same method is used to provide the model’s initial state for forecasts (e.g. weather forecasts).