ERA5-Land (ERA5_LAND)
Upstream: Same CDS stack as ERA5 (ERA5), with ERA5-Land dataset parameters (snow cover, SWE, etc.).
Transport: coldcast.sources.era5.download() with data_source ERA5_LAND.
Auth: CDS ~/.cdsapirc.
CLI: coldcast download era5_land
Settings: Under ECMWF, product key ERA5_LAND — variables, hours, num_days_back, delay_days. A legacy top-level ERA5_LAND block is still read if present. Extent uses the same bounding-box merge rules as ERA5 (ERA5).
Code: coldcast.sources.era5 (shared with ERA5)