Add documentation on excess ice to the technical note

[ekluzek]

With #1229 and PR #1787 we need to have excess ice documented in the tech note.

[mvdebolskiy]

Comment to assign myslef.

[mvdebolskiy]

Do I understand correctly that I can append the equations and a write up here?

[ekluzek]

@mvdebolskiy yes, that's correct. @olyson can you give @mvdebolskiy some guidance on editing the Tech note as well?

There are directions on the wiki, for example here...

https://github.com/ESCOMP/CTSM/wiki/Directions-for-editing-CLM-documentation-on-github-and-sphinx

[olyson]

I use the instructions that Erik provided, on my windows machine using the docker method.

[mvdebolskiy]

@dlawrenncar @swensosc I've pushed a small writeup into the documentation. Can you check it? Let me know if I need to expand it.

[samsrabin]

@mvdebolskiy, what's the latest on this?

[mvdebolskiy]

@samsrabin just waiting for Sean or Dave to review #2161 and this can be closed.