20CRv3 Diagnostics

This is a set of analyses of the not-yet-released NOAA/CIRES/DOE Twentieth Century Reanalysis version 3 (20CRv3). It compares 20CRv3 to 20CR version 2c, to CERA-20C, and to newly-digitised observations from around the British Isles.

Validation against observations

The new observations rescued from the Daily Weather Reports have not yet been used by any reanalysis, so they are ideal for validation. Doing the comparison for several different times during the period covered by the new observations shows the effect of varying reanalysis and observation quality.

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