Plotting the data with Chart::Gnuplot
Extracting ice extent plotting into its own routine
Extracting data saving code into its own routine
Ignoring more automatically generated files
Extracting data download into its own routine
Making getstore() args a bit more obvious
Extracting extents data extraction into its own routine
Downloading data inside get_extents_data()
Implementing extracting, plotting and saving minima data
Removing the first and last minima since they are outliers
Removing superfluous backslash

And now the files can be downloaded again...
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