Add analysis of sea ice formation and melt rates

[xylar]

Assuming rates of sea ice formation and melting are available in the timeSeriesStats AM, an analysis task that compares these against SOSE and possibly satellite-derived formation rates (e.g. Tamura 2008) would be useful.

[xylar]

I added the "sub-ice-shelf" tag because this analysis would be of interest to the ALCC project related to ice-shelf melting.

[akturner]

Hi, I have a prototype script that can calculate a mass balance for a region, so this would be useful for this.

[xylar]

Excellent! Please do share and I can see if I can bang it into MPAS-Analysis form. This worked well for @JeremyFyke's script for ocean transects.

Are you aware of any observations to use? If not, I'll see what we might be able to use from SOSE. Or the Tamura et al. [citation needed] production maps might be another option.

[xylar]

A possible data set to use: https://www.envidat.ch/dataset/10-16904-8

From this paper: https://www.nature.com/articles/nature19101