ISSMteam/ISSM: 2026.1

This is a regular quarterly release of ISSM.

What's Changed

• WIP: AD devleopment by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/1
• Bump the npm_and_yarn group across 1 directory with 2 updates by @dependabot[bot] in https://github.com/ISSMteam/ISSM/pull/2
• WIP: Feature/ad development by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/3
• CHG: ITS_LIVE annual velocity updated to v02 by @enigne in https://github.com/ISSMteam/ISSM/pull/4
• WIP: Feature/ad development by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/5
• Add CI by @enigne in https://github.com/ISSMteam/ISSM/pull/6
• CI run Matlab tests by @enigne in https://github.com/ISSMteam/ISSM/pull/7
• add cache and artifact to simplify the test by @enigne in https://github.com/ISSMteam/ISSM/pull/8
• reorganize CI, add linux-codipack build+test by @enigne in https://github.com/ISSMteam/ISSM/pull/9
• separate ubuntu-basic and codipack CI by @enigne in https://github.com/ISSMteam/ISSM/pull/11
• bug fix in moving from, calculate calving rate after extrapolation by @enigne in https://github.com/ISSMteam/ISSM/pull/12
• update workflow by @enigne in https://github.com/ISSMteam/ISSM/pull/13
• Update ICESat ATL14/15 to version 4 by @enigne in https://github.com/ISSMteam/ISSM/pull/14
• update TACC Frontera by @enigne in https://github.com/ISSMteam/ISSM/pull/15
• NEW: Add option to include subglacial hydrology layer in driving stress calculation in SSA by @koitf1 in https://github.com/ISSMteam/ISSM/pull/16
• NEW: include src/m/contrib/poinelli by @MPoinelli in https://github.com/ISSMteam/ISSM/pull/19
• NEW: nightly run test for stressbalance hydrology layer by @koitf1 in https://github.com/ISSMteam/ISSM/pull/18
• CHG: minor edits, include larsen-thwaites hosts to interpStal2020 by @MPoinelli in https://github.com/ISSMteam/ISSM/pull/21
• Love core update by @caronlam in https://github.com/ISSMteam/ISSM/pull/22
• Enum fix for Love core update by @caronlam in https://github.com/ISSMteam/ISSM/pull/23
• Fix NaN in mass flux computation by @dabele in https://github.com/ISSMteam/ISSM/pull/24
• CHG: Fix bug in src/c/analyses/SmbAnalysis.cpp by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/25
• Use xarray for interpolating netcdf file in both MATLAB and Python. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/26
• FIX: Love number core Tidal outputs by @caronlam in https://github.com/ISSMteam/ISSM/pull/28
• CHG: Fix SEMIC module in ISSM. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/30
• add python CI by @enigne in https://github.com/ISSMteam/ISSM/pull/31
• Revert "add python CI" by @enigne in https://github.com/ISSMteam/ISSM/pull/32
• add python CI by @enigne in https://github.com/ISSMteam/ISSM/pull/33
• NEW: add "loadmodel_netcdf.py" in "src/m/contrib/inwoo" by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/36
• CHG: Fix default value for decreasing downward longwave radiation with a value of 29 W m-2 km-1. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/37
• Add Amundsen path to ISMIP6 interp functions by @totorotoby in https://github.com/ISSMteam/ISSM/pull/38
• add exp file generating function by @totorotoby in https://github.com/ISSMteam/ISSM/pull/39
• fixed directory for ocean forcing by @totorotoby in https://github.com/ISSMteam/ISSM/pull/44
• CHG: Fix bugs in SMBsemic modules and add options for desertification effect and downward longwave radiation. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/45
• CHG: loadmodel_netcdf.py - skip loading mmemasstransport in Python. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/46
• Fix mechanicalproperties.py. Synchronize mechanicalproperties.py from Matlab. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/47
• CHG: added additional checks for homebrew installed python libraries by @justinh2002 in https://github.com/ISSMteam/ISSM/pull/48
• Added smb, friction, hydrology to read/write_netCDF by @adamjhepburn in https://github.com/ISSMteam/ISSM/pull/49
• ADD: added support for running simulations on gadi remote cluster by @justinh2002 in https://github.com/ISSMteam/ISSM/pull/50
• Add ability for GEMB forcing to be mapped onto the model mesh using lapse rates by @NJSchlegel in https://github.com/ISSMteam/ISSM/pull/51
• CHG: update interp files for passing in other servers and building with MATLAB_DIR by @NJSchlegel in https://github.com/ISSMteam/ISSM/pull/52
• NetCDF compression (zlib) and Setonix support by @justinh2002 in https://github.com/ISSMteam/ISSM/pull/53
• BUG: only write part of large outlogs and errlogs by @jabadge in https://github.com/ISSMteam/ISSM/pull/59
• ADD: contrib/badgeley modeldata new interpolation scripts and bug fix by @jabadge in https://github.com/ISSMteam/ISSM/pull/56
• CHG: added preemptable node option for Discovery by @jabadge in https://github.com/ISSMteam/ISSM/pull/57
• ADD: added up to Outputdefinition2000Enum by @jabadge in https://github.com/ISSMteam/ISSM/pull/58
• Feature/adjoint petsc by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/61
• CHG: Add humidity downscaling to GEMB mapping routine for smoother spatial melt patterns by @NJSchlegel in https://github.com/ISSMteam/ISSM/pull/62
• NEW: Matlab > Python - add plot_gridded.py for drawing gridded image as like matlab. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/63
• CHG: update GEMB mapping routine to downscale surface pressure and use a simpler calculation of relative humidity by @NJSchlegel in https://github.com/ISSMteam/ISSM/pull/64
• Fix plot_gridded.py in Python. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/65
• CHG: Fixed frictionweertman.py for compatibility with 3D model extrusion. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/66
• added patch .bin files utility by @justinh2002 in https://github.com/ISSMteam/ISSM/pull/67
• CHG: Python > Matlab - Fix to plotting functions in src/m. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/68
• CHG: add GEMB mapping option for precip downscaling and dlw downscaling with temperature when lapse rate is set to zero by @NJSchlegel in https://github.com/ISSMteam/ISSM/pull/69
• Prepare for CoDiPack v3. by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/70
• added -l option for sourcing bashrc on andes when running a batch script by @totorotoby in https://github.com/ISSMteam/ISSM/pull/72
• CHG: Fix calculating basal stress using "friction.m" class. Synchronize Matlab >Python. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/74
• CHG: basalstress.m - Fix bugs. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/75
• Update plot functions in Python: plot_gridded.py, applyoptions.py, plot_contour.py. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/77
• Twh/datatips by @totorotoby in https://github.com/ISSMteam/ISSM/pull/84
• CHG: Python - Fix bugs in plotting BC, and use either 'BC' or 'bc' interchangeably. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/85
• adjoint fix by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/86
• Missing interface changes. by @MaxSagebaum in https://github.com/ISSMteam/ISSM/pull/87
• Add help documentation to loadresultsfromdisk.m by @bgetraer in https://github.com/ISSMteam/ISSM/pull/103
• Update gadi.py cluster by @lawrenceabird in https://github.com/ISSMteam/ISSM/pull/107
• Introducing a spatially variable grounding zone + minor commits by @MPoinelli in https://github.com/ISSMteam/ISSM/pull/106
• CHG: basalstress.m in matlab, python supports Schoof-type friction law. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/110
• Try to fix out of space issue in Codipack CI by @enigne in https://github.com/ISSMteam/ISSM/pull/111
• Modifed cleanup during GitHub workflows by @TidbitSoftware in https://github.com/ISSMteam/ISSM/pull/112
• fixed paths to find the source code of older PETSc versions. by @LukasvdWiel in https://github.com/ISSMteam/ISSM/pull/114
• CHG: Matlab >Python. Add "plot_none.py" for supporting to plot "none" in plotmodel. by @inwoo-park in https://github.com/ISSMteam/ISSM/pull/117

New Contributors

• @MaxSagebaum made their first contribution in https://github.com/ISSMteam/ISSM/pull/1
• @dependabot[bot] made their first contribution in https://github.com/ISSMteam/ISSM/pull/2
• @enigne made their first contribution in https://github.com/ISSMteam/ISSM/pull/4
• @koitf1 made their first contribution in https://github.com/ISSMteam/ISSM/pull/16
• @MPoinelli made their first contribution in https://github.com/ISSMteam/ISSM/pull/19
• @caronlam made their first contribution in https://github.com/ISSMteam/ISSM/pull/22
• @dabele made their first contribution in https://github.com/ISSMteam/ISSM/pull/24
• @inwoo-park made their first contribution in https://github.com/ISSMteam/ISSM/pull/25
• @totorotoby made their first contribution in https://github.com/ISSMteam/ISSM/pull/38
• @justinh2002 made their first contribution in https://github.com/ISSMteam/ISSM/pull/48
• @adamjhepburn made their first contribution in https://github.com/ISSMteam/ISSM/pull/49
• @NJSchlegel made their first contribution in https://github.com/ISSMteam/ISSM/pull/51
• @jabadge made their first contribution in https://github.com/ISSMteam/ISSM/pull/59
• @bgetraer made their first contribution in https://github.com/ISSMteam/ISSM/pull/103
• @lawrenceabird made their first contribution in https://github.com/ISSMteam/ISSM/pull/107
• @TidbitSoftware made their first contribution in https://github.com/ISSMteam/ISSM/pull/112
• @LukasvdWiel made their first contribution in https://github.com/ISSMteam/ISSM/pull/114

Full Changelog: https://github.com/ISSMteam/ISSM/compare/v4.24...2026.1