08 Apr 2024
 | 08 Apr 2024
Status: this preprint is currently under review for the journal ESSD.

CHclim25 – a spatially and temporally very high-resolution climatic dataset for Switzerland

Olivier Broennimann and Antoine Guisan

Abstract. CHclim25 is a climatic dataset with a 25 m resolution for Switzerland that includes daily, monthly and yearly layers for temperature, precipitation, relative sunshine duration, growing degree-days, potential evapotranspiration, bioclimatic variables and aridity. The dataset is downscaled from a daily 1 km resolution dataset from the Swiss federal agency for meteorology using local regressions with an elevation model to better account for local topography and complex local climatic phenomena. Climatic layers are provided for individual years, 1981–2010 baseline period and future periods 2020–2049, 2045–2074, and 2070–209. Future layers incorporate three regional/global circulation models and three representative concentration pathways. We compare our predictions with values observed at independent weather stations and show that errors are minimal in comparison to the original dataset at 1 km resolution, and that the dataset is more accurate than available climatic global datasets at 30’ resolution, especially at high elevation. CHclim25 improves the temporal and spatial accuracy of climatic data available for Switzerland and enables new studies at very high resolution in ecology and environmental sciences.

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Olivier Broennimann and Antoine Guisan

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2024-79', Anonymous Referee #1, 07 May 2024
  • RC2: 'Comment on essd-2024-79', Anonymous Referee #2, 14 May 2024
Olivier Broennimann and Antoine Guisan

Data sets

CHclim25 - a spatially and temporally very high resolution climatic dataset for Switzerland Olivier Broennimann

Model code and software

CHclim25 - R scripts Olivier Broennimann

Olivier Broennimann and Antoine Guisan


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Short summary
CHclim25 is a high-resolution climatic dataset for Switzerland, offering daily, monthly, and yearly data on temperature, precipitation, sunshine duration, and other derived climatic variables for the baseline 1981–2010 period and future periods up to 2099. Downscaled to 25 m using local topography, it outperforms global datasets, especially at higher elevations. CHclim25 enhances both temporal and spatial resolution, opening avenues for ecological and environmental research in Switzerland.