ISIMIP3a atmospheric climate input data

This data set provides atmospheric climate input data to be used as input data for ISIMIP3a (www.isimip.org, Frieler et al. 2023, in prep.). We provide four factual climate input datasets for ISIMIP3a: GSWP3-W5E5, 20CRv3-W5E5, 20CRv3-ERA5, and 20CRv3. All of them have daily temporal and 0.5° spatial resolution. Their temporal coverage varies, with GSWP3-W5E5 and 20CRv3-W5E5 covering 1901-2019, while 20CRv3-ERA5 and 20CRv3 cover 1901-2021 and 1901-2015, respectively. For every factual dataset (obsclim) we provide an associated counterfactual dataset (counterclim) covering the same time period, 100 years worth of climate data to be used for model spin-up (spinclim), and 50 years worth of climate data for the transition from spinclim to counterclim or obsclim (transclim).<br>Version 1.1 fixes missing values in GSWP3-W5E5 snow fall input data (see https://data.isimip.org/caveats/26/).<br>Version 1.2 adds extractions of grid cell data for different lake sites.<br>Version 1.3 adds the years 2022-2024 for 20CRv3-ERA5 and obsclim.