wdc-climate.de:5369676 eng; USA collection SEAS5-BCSD Jan Niklas Weber Karlsruhe Institute of Technology not filled pointOfContact Christof Lorenz Karlsruhe Institute of Technology not filled pointOfContact 2025-12-17T11:13:23 ISO 19115 ISO 19115-2:2009 Global Bias-corrected Seasonal Forecast (SEAS5-BCSD) Archive 1981 To 2024 For Precipitation And Temperature 2026-01-12 publication 1 SEAS5-BCSD doi:10.26050/WDCC/SEAS5-BCSD Jan Niklas Weber Karlsruhe Institute of Technology not filled Email: jan.weber@kit.edu principalInvestigator Jan Niklas Weber Karlsruhe Institute of Technology not filled Email: jan.weber@kit.edu author Christof Lorenz Karlsruhe Institute of Technology not filled Email: christof.lorenz@kit.edu author Dr. Tanja Christina Schober Karlsruhe Institute of Technology not filled Email: tanja.schober@kit.edu author Dr. Harald Kunstmann Karlsruhe Institute of Technology not filled Email: harald.kunstmann@kit.edu author WDCC publisher Seasonal forecasts provide valuable insights into upcoming conditions, offering forecast horizons of up to seven months. However, uncorrected seasonal forecasts often exhibit substantial biases and drifts, when compared to reference data like, e.g., ERA5. This makes post-processing essential for their use in analysis and downstream modelling. This dataset provides bias-corrected and downscaled seasonal forecasts from the ECMWF SEAS5 system for precipitation and 2-meter temperature, covering the global land surface at 0.25° resolution. Using the Bias Correction and Spatial Disaggregation (BCSD) method, forecasts are corrected for biases and temporal drifts and include all SEAS5 ensemble members over the full hindcast period (1981–2016) and until 2024. The dataset supports lead times up to seven months and is suitable for a wide range of applications in water, energy, and agricultural sectors. Forecast quality has been evaluated using Brier Skill Scores and CRPSS, showing strong skill for temperature across most regions and for precipitation in tropical and humid areas. Jan Niklas Weber Karlsruhe Institute of Technology not filled pointOfContact Christof Lorenz Karlsruhe Institute of Technology not filled pointOfContact NetCDF ECMWF SEAS5 ERA5 bias-correction seasonal forecasts CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA 0.0 360.0 -90.0 90.0 1981-01-01 2025-06-30 info:eu-repo/grantAgreement/BMFTR//02WGR1642C/DE//OUTLAST forecast_period not filled; unit: month air_temperature Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: K forecast_reference_time not filled; unit: day precipitation_flux In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: mm d-1 NetCDF 60002 https://www.wdc-climate.de/ui/entry?acronym=SEAS5-BCSD information collection