FGT forecasts and climatologies

This dataset contains precomputed FGT forecast and climatology Zarr stores, plus daily ERA5 truth for forecast verification. Download the repository locally, install the notebook dependencies, and open load_fgt_forecasts.ipynb for a minimal loading, debiasing, and plotting example.

era5_daily_2020_2026_analytic_rsdt_masked.zarr contains 59 daily ERA5 channels on the 1-degree FGT grid from 2020-01-01 through 2026-06-20. Its mean_top_downward_short_wave_radiation_flux channel is the same GraphCast-style analytic daily RSDT used by FGT (360 integration bins), rather than the archived ERA5 radiation field. tos and siconc are NaN on land, and mrso is NaN over ocean.

The notebook expects the downloaded Zarr directories and era5_ocean_mask_on_era5_daily_grid.nc beside the notebook. It demonstrates post-debias physical clipping, applies the mask to land- and ocean-only channels, and plots ERA5 truth averaged over the exact FGT valid days. It uses xarray, zarr==3.2.1, dask, matplotlib, cftime, and h5netcdf.

The FGT source code is maintained in the private development repositories and will be linked here when it is publicly released.