fix crs var detection

catalog/CooperMcKenzie/collection.json

catalog/CooperUpperDeschutes/collection.json

...laska_et_2020_ccsm4_historical_simulation/collection.json

...log/alaska_et_2020_era-interim_reanalysis/collection.json

...alaska_et_2020_gfdl_historical_simulation/collection.json

.../archive/CooperMcKenzie_create_collection_from_zarr.ipynb

...ve/CooperUpperDeschutes_create_collection_from_zarr.ipynb

...4_historical_simulation_create_collection_from_zarr.ipynb

..._era-interim_reanalysis_create_collection_from_zarr.ipynb

...l_historical_simulation_create_collection_from_zarr.ipynb