Articles | Volume 12, issue 7
https://doi.org/10.5194/cp-12-1555-2016
https://doi.org/10.5194/cp-12-1555-2016
Research article
 | 
21 Jul 2016
Research article |  | 21 Jul 2016

Influence of proxy data uncertainty on data assimilation for the past climate

Anastasios Matsikaris, Martin Widmann, and Johann Jungclaus

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Short summary
We have assimilated proxy-based (PAGES 2K) and instrumental (HadCRUT3v) observations into a General Circulation Model (MPI-ESM-CR). Assimilating instrumental data improves the performance of Data Assimilation. No skill on small spatial scales is however found for either of the two schemes. Errors in the assimilated data are therefore not the main reason for this lack of skill; continental mean temperatures cannot provide skill on small spatial scales in palaeoclimate reconstructions.