Create simple distributed plots of one timestep or of a daily mean.

python plot_cosipy_fields.py -f nc_file -d timestamp
python plot_cosipy_fields.py -f nc_file -d timestamp [-m] [-s] [-v variable] [-t <int>]

Example:

Create a contour plot of the daily mean for surface mass balance for the
Zhadang test data, and save the plot to disk.

python plot_cosipy_fields.py \
    -i "../../../data/output/Zhadang_ERA5_20090101-20090110.nc"
    -d "2009-01-05" \
    -v "surfMB" \
    -t 1 \
    -m \
    -s

Required arguments:
    -i, --input <path>       Path to .nc file.
    -d, --date <str>         Target date or timestamp.

Optional switches:
    -s, --save               Save plot. File name is automatically generated.
                                 Default False.
    -m, --mean               Plot daily mean instead of timestep. Default False.

Optional arguments:
    -v, --var <str>          Variable to plot. If not set, creates a stamp plot.
    -t, --type <int>         Set plot type. 1: contour, 2: mesh. Default 1.
