Issues using ERA5 Dataset Downloader and Converter

[alchen1818]

I have been attempting to use the ERA5 dataset downloader and converter located under modulus/examples/weather/dataset_download. I have setup the CDS API key, and am trying to run ‘python start_mirror.py’. When running it initially, I get an error of: ‘ValueError: chunks keys (‘time’,) not found in data dimensions (‘valid_time’, ‘latitude’, ‘longitude’)’ coming from line 209 in era5_mirror.py of ‘ds = ds.chunk(chunking)’. From looking into this myself, this seems to be an issue stemming from era5_mirror.py under download_chunk(), where the dataset that is opened from the requested data from CDS API has dimensions of ‘valid_time’, ‘latitude’, and ‘longitude’. I tried to remedy this problem by renaming the dimension ‘valid_time’ to ‘time’. However, doing so raised another issue, this time of: ‘ValueError: append_dim=‘time’ does not match any existing dataset dimensions {}’ coming from line 223 of era5_mirror.py of ‘ds.to_zarr(mapper, mode=mode, consolidated=True, append_dim=append_dim)’. I am very confused by this error, as it seemed to me that after renaming the dimensin to ‘time’ that the append_dim=‘time’ should match an existing dataset dimension. I would greatly appreciate any help on this matter.