Improving reanalysis with offline assimilation


This document is still under construction.

This is a modernised version of a scientific paper: It shows how to visualise weather reconstructions from the Twentieth Century Reanalysis (version3, 20CRv3), how to validate the reconstructions by comparison with newly-available observations, and how to use the new observations to improve the reanalysis, using an offline version of the ensemble Kalman Filter.

It differs from a standard paper by including video figures, by including many more figures and examples than would be possible in a paper document, and by including all the code and data needed to reproduce or extend it.

This document and the data associated with it are crown copyright (2018) and licensed under the terms of the Open Government Licence. All code included (modules and scripts) is licensed under the terms of the GNU Lesser General Public License.