ice_scoring

Tools for model evaluation, primarily of sea ice models.

Now includes submodules

• SIDFEx https://github.com/helgegoessling/SIDFEx
• SITools https://github.com/XiaLinUCL/Sea-Ice-Evaluation-Tool
• DIAG_SUITE https://github.com/NeilBarton-NOAA/DIAG_SUITE

Quick start for NCEP_si_verf:

• Build the executables:
  • first build the mmablib -- cd ../mmablib; make
  • In the ice_scoring main directory ./makeall.sh
• You'll also need the fixed files. Copy or use (ln -s):
  • WCOSS: /u/Robert.Grumbine/rgdev/fix
  • Hera: /home/Robert.Grumbine/rg/fix
  • Gaea: /home/Robert.Grumbine/rg/fix
• For gross checks, more detail in gross_checks/README
  • python3 gross_ice.py NAME_OF_ICE.nc ctl/ice.extremes redone.dictionary
    • similarly for ocean.
  • there are a number of control (ctl) files, in order of least to highest frequency of output:
    • .extremes, .vvhigh, .vhigh, .high, .moderate

NCEP_si_verf Contents:

Directly skill-related:

• main -- main .csh and python scripts to carry out model verification

• drift -- ice drift skill metrics, oriented to the old drift model (sk2) using IABP for verification

  • these are relatively well-developed as metrics, see TN NNN, MMM for discussion

• concentration -- metrics for measuring skill in sea ice concentration fields, the whole field, not just the edge

• ice_edge -- find ice edge from an ice concentration analysis using transition against a tolerance

  • score a pair of ice edges
  • algorithms per discussions with Rick Allard (NRL) and Barbara Casati (ECCC)

• thickness -- to be intercomparisons on sea ice thickness

• integral

  • for ice area and extent, globally, hemispherically, and (in principle) within regions
  • integrated ice edge extent error (likewise, in principle)

• gross_checks -- check for structural problems (grid seams) or impossible values (e.g. SST < -3)

Supportive:

• nulls -- null forecasters

• exec -- executables (not on git, generated by makeall.sh)

• formats -- brief demonstrations of decoding various input file types and formats

• legacy -- archive of codes used in support of papers 1994-2017.

Not in github:

• docs -- documents on ice model scoring