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Add ISMIP7 postprocessing framework#733

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Add ISMIP7 postprocessing framework#733
hollyhan wants to merge 5 commits into
MPAS-Dev:masterfrom
hollyhan:hollyhan/landice

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@hollyhan

@hollyhan hollyhan commented Jun 22, 2026

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Last updated: 2026/06/24

This PR updates the MALI postprocessing scripts for ISMIP7 based on the ISMIP6 postprocessing scripts.

Completed

  • Updated 2D flux processing to use MALI's online time-averaged flux outputs directly, removing the legacy offline time-averaging workflow.
  • Updated mandatory 1D scalar flux outputs to match the ISMIP7 variable request:
    • Added tendlibmassbfgr
    • Updated tendlifmassbf to represent ice-front melting only
    • Removed the legacy total basal mass balance scalar output

Remaining work

  • (Optional) Implement the remaining optional ISMIP7 variables. (That is, variables highlighted in purple and litempavg in the ISMIP7 variable spreadsheet https://docs.google.com/spreadsheets/d/1yWDxk8pRwwp3gvRT6j0lsWA_5hAkAXqZdLGtgpnLSNE/edit?gid=2113789754#gid=2113789754
  • Testing with simulation outputs in the directory /global/cfs/cdirs/fanssie/MALI_projects/ISMIP7/june30_runs/AIS on Perlmutter.
  • Validate the generated NetCDF files against the ISMIP7 variable request (as of 2026/06/24, standard name is incomplete for variables tendlifmassbf, tendligroundf in the ISMIP7 variable spreadsheet.

This is an exact copy of ISMIP6 postprocessing as a starting point
@trhille trhille marked this pull request as draft June 22, 2026 17:07
hollyhan added 4 commits June 24, 2026 18:02
This change follows updates to MALI in which flux outputs are averaged
online over each output interval.
Also update flux-variable metadata to match the ISMIP7 variable request
(https://docs.google.com/spreadsheets/d/1yWDxk8pRwwp3gvRT6j0lsWA_5hAkAXqZdLGtgpnLSNE/edit?gid=2113789754#gid=2113789754) and stop calling the legacy flux cleaning/time-averaging functions from the main script: post_process_mali_to_ismip7.py
MALI now provides interval-averaged flux outputs directly, so these legacy
ISMIP6 preprocessing steps are no longer needed.
Add the grounded basal mass balance scalar output required by ISMIP7,
update the ice-front melting scalar to use face melting only, and
remove the legacy total basal mass balance scalar output.
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