EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

PTBox, a toolbox to facilitate palaeoclimate model-data analyses

Jean-Philippe Baudouin1,2, Oliver Bothe3, Manuel Chevalier4,5,6, Beatrice Ellerhoff1,2, Moritz Adam2, Patrizia Schoch2, Nils Weitzel2, and Kira Rehfeld1,2
Jean-Philippe Baudouin et al.
  • 1Geo- und Umweltforschungszentrum (GUZ), Universität Tübingen, Schnarrenbergstr. 94-96, 72076 Tübingen, Germany
  • 2Institut für Umweltphysik (IUP), Universität Heidelberg, INF229, 69120 Heidelberg, Germany
  • 3Helmholtz-Zentrum Hereon, Geesthacht, Germany
  • 4Institute of Geosciences, Sect. Meteorology, Rheinische Friedrich-Wilhelms-Universität Bonn, Auf dem Hügel 20, 53121 Bonn, Germany
  • 5Max Planck Institute for Meteorology, Bundesstrasse 53, 20146 Hamburg, Germany
  • 6Institute of Earth Surface Dynamics, Geopolis, University of Lausanne, Lausanne, Switzerland

Recent progress in modelling the Earth system has made it possible to produce transient climate simulations longer than 10.000 years with comprehensive ESMs. These simulations improve our understanding of slow climatic feedbacks, climate state transitions, and abrupt climate changes. However, assessing the quality and reliability of such paleoclimate simulations is particularly challenging due to the inherent characteristic differences between model data and the climate reconstructions used to validate them.

Here, we present a collection of software packages for inter-model and model-data comparisons called Palaeo ToolBox (PTBox). Its first intent is to evaluate transient simulations of the PalMod project (deglaciation, glacial inception, MIS3) using several proxy data syntheses. Various variables are evaluated (including temperature, precipitation, oxygen isotopes, vegetation, carbon storages and fluxes), across a range of timescales (from decadal to multi-millenial). PTBox provides integrated model-data workflows, from data pre-processing to visualisations, organised into a series of (mostly R) packages. So far, PTBox includes 1) tools for pre-processing simulations and proxy data, 2) ensemble and pseudo-proxy methods to bridge the gap between simulations and proxies and to quantify uncertainties, 3) spectral methods to analyse timescale-dependent climate variability, and 4) newly developed metrics for spatio-temporal model-data comparisons.

Finally, PTBox is accompanied by a website ( with examples on how to use PTBox and interactive visualisations of the datasets produced in the PalMod project.

How to cite: Baudouin, J.-P., Bothe, O., Chevalier, M., Ellerhoff, B., Adam, M., Schoch, P., Weitzel, N., and Rehfeld, K.: PTBox, a toolbox to facilitate palaeoclimate model-data analyses, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-3684,, 2022.