SEAS5-BCSD: a bias-corrected and downscaled global seasonal forecast reference dataset for 1981–2024

Weber, Jan N.; Lorenz, Christof; Schober, Tanja C.; Wiegels, Rebecca; Kunstmann, Harald

doi:10.5194/essd-18-5259-2026

Articles | Volume 18, issue 7

https://doi.org/10.5194/essd-18-5259-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-18-5259-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 7

Data description article

|

22 Jul 2026

Data description article |

| 22 Jul 2026

SEAS5-BCSD: a bias-corrected and downscaled global seasonal forecast reference dataset for 1981–2024

Jan N. Weber, Christof Lorenz, Tanja C. Schober, Rebecca Wiegels, and Harald Kunstmann

Data sets

Global Bias-corrected Seasonal Forecast (SEAS5-BCSD) Archive 1981 To 2024 For Precipitation And Temperature J. N. Weber et al. https://doi.org/10.26050/WDCC/SEAS5-BCSD

Model code and software

PyCast-S2S: A Python Framework for Subseasonal-to-Seasonal Forecast Post-Processing C. Lorenz et al. https://doi.org/10.5281/ZENODO.16926092

Short summary

Seasonal forecasts can support drought preparedness but are often limited by systematic biases. We present a global Bias-Corrected and Spatially Disaggregated (BCSD) reference dataset based on the European Centre for Medium-Range Weather Forecasts (ECMWF) Seasonal Forecasting System 5 (SEAS5) and observational data. It provides 0.25° global land forecasts from 1981 onward for improved drought and climate-impact applications and is openly available via the World Data Center for Climate.