#920: add halo removal for SI3

[Lauren Boon (mo-laurenboon)]

Closes issue #920

[Lauren Boon (mo-laurenboon)]

I anticipate that no further changes will be required, however I am running all unit tests and an adhoc run of UKCM2-0-LL to confirm that the removal is applying as expected before marking as ready for review.

[Lauren Boon (mo-laurenboon)]

All unit tests passing

[Lauren Boon (mo-laurenboon)]

I have completed an adhoc workflow run of ukcm2-0-LL historical with the following variables:

• seaIce/siflswdbot_tavg-u-hxy-si@day:ind/icemod
• seaIce/simpconc_tavg-u-hxy-si@day:ind/icemod
• seaIce/simpthick_tavg-u-hxy-si@day:ind/icemod
• seaIce/sidmasstranx_tavg-u-hxy-u@mon:inm/icemod
• seaIce/siflcondbot_tavg-u-hxy-si@mon:inm/icemod
• seaIce/siconc_tavg-u-hxy-u@mon:inm/icemod

Output can be seen in my data files under the testing_SI3_halo_removal directory. A quick ncview of these files appears to show the expected outcome of the fix. These output files should be checked as part of any review to confirm this.

Workflow runs as expected with no errors or job failures.

[Matthew Mizielinski (matthew-mizielinski)]

LGTM