Articles | Volume 16, issue 4
Clim. Past, 16, 1309–1323, 2020
https://doi.org/10.5194/cp-16-1309-2020
Clim. Past, 16, 1309–1323, 2020
https://doi.org/10.5194/cp-16-1309-2020

Research article 24 Jul 2020

Research article | 24 Jul 2020

Assimilating monthly precipitation data in a paleoclimate data assimilation framework

Veronika Valler et al.

Data sets

Global Historical Climatology Network - Daily (GHCN-Daily) M. J. Menne, I. Durre, B. Korzeniewski, S. McNeal, K. Thomas, X. Yin, S. Anthony, R. Ray, R. S. Vose, B. E. Gleason, and T. G. Houston https://doi.org/10.7289/V5D21VHZ

Ensemble Kalman Fitting Paleo-Reanalysis Version1 (EKF400_v1), World Data Center for Climate (WDCC) at DKRZ J. Franke, S. Brönnimann, J. Bhend, and Y. Brugnara https://doi.org/10.1594/WDCC/EKF400_v1

EKF400 code J. Franke, and V. Valler https://github.com/jf256/reuse.git

Assimilating monthly precipitation data in a paleoclimate data assimilation framework V. Valler, Y. Brugnara, J. Franke, and S. Brönnimann https://boris.unibe. ch/144867

NOAA-CIRES-DOE 20th Century Reanalysis V3 L. C. Slivinski, G. P. Compo, J. S. Whitaker, and P. D. Sardeshmukh https://psl.noaa.gov/

European Gridded Seasonal Precipitation Reconstructions A. Pauling, J. Luterbacher, C. Casty, and H. Wanner https://www.ncdc.noaa.gov/paleo/ study/6342

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Short summary
Data assimilation is becoming more and more important for past climate reconstructions. The assimilation of monthly resolved precipitation information has not been explored much so far. In this study we analyze the impact of assimilating monthly precipitation amounts and the number of wet days within an existing paleoclimate data assimilation framework. We find increased skill in the reconstruction, suggesting that monthly precipitation can constitute valuable input for future reconstructions.