xr_area_weight should maintain attributes, etc.

[bradyrx]

Currently, xr_area_weight returns an unnamed DataArray. I always find myself renaming the DataArray after so I can convert it back to a Dataset. I need to go back through this with a careful eye.

[aaronspring]

they will soon add something like this to xarray: pydata/xarray#2922

[bradyrx]

That looks nice.

[bradyrx]

Looks like you can pass keep_attrs=True to functions, e.g. .mean(keep_attrs=True) pydata/xarray#442

[aaronspring]

and this can be set globally for xr

[bradyrx]

Yeah but I think the argument is that there are certain functions where you don't want attributes maintained. But I'm not sure what those would be. So maybe we set this in the __init__ function or something.

[bradyrx]

area_weight should be deprecated anyways in favor of xarray's weighted objects.