Is your feature request related to a problem? Please describe.

For temporal consistency when using the temporal downscaler, we have been experimenting with using additional loss functions. We have seen large improvements in consistency especially for precipitation and so would strongly recommend using these loss functions when running the temporal downscaler and would like to implement these in anemoi-core. These include:

1. min across the window
2. max across the window
3. mean across the window
4. diff across the window

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Additional context

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Organisation

ecmwf