Load input data, including pr2ar, the PfPR, and the AM.
load_data(config, pr2ar_version, domain_extent, years)
| config | Input configuration file name.  | 
    
|---|---|
| pr2ar_version | Which version of the   | 
    
| domain_extent | Bounding box that we compute within the MAP raster.  | 
    
| years | Which years to do.  | 
    
A list with the loaded data.