Simon Filhol

Try to remove the o.is_file() in the lambda line [71](https://github.com/ArcticSnow/TopoPyScale/blob/0bacdc4cb794f1d399e94b6ee7536aa2d23845af/TopoPyScale/fetch_era5.py#L71). The current implementatino checking if the file exist is slow when looping over more than 30 files. One option is...

If each pixel is assigned to more than one clusters then this can be used to smooth out the output of toposub. @joelfiddes, I'll let you fill in the details...

Wind: implement Liston and Elder method

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Wind can be corrected using a simplistic correction method described in Liston and Elder (2006). This can be implemented as a separate/optional method. See Appendice C in Fiddes and Gruber...

There is a number of sensitivity analysis to perform: 1. DEM resolution. How far does it make sense to push the DEM resolution. Does toposcale hit a plateau, stop adding...

add ASTER dem fetching

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add routine to fetch ASTER dem to `fetch_dem.py`

write routines to evaluate bias and scaling issues against local observation

# Gap filling of observation based on downscaled climate data