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Merge pull request #2789 from samsrabin/update-ctsm53-release-notes
Update "What's New in CTSM 5.3"
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| Purpose and description of changes since ctsm5.2.005 | ||
| ---------------------------------------------------- | ||
| # What's new in CTSM 5.3 (tag `ctsm5.3.0`) | ||
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| Bring in updates needed for the CESM3.0 science capability/functionality "chill". Most importantly bringing | ||
| in: CN Matrix to speed up spinup for the BGC model, updated surface datasets, updated Leung 2023 dust emissions, | ||
| explicit Air Conditioning for the Urban model, updates to crop calendars. For clm6_0 physics these options are now | ||
| default turned on in addition to Sturm snow, and excess ice. | ||
| ## Purpose and description of changes since CTSM 5.2 (tag `ctsm5.2.005`) | ||
| - Adds CN Matrix method to speed up spinup for the BGC model. | ||
| - Updates surface datasets. | ||
| - Brings in new Leung 2023 dust emissions. | ||
| - Adds explicit air conditioning for the urban model. | ||
| - Updates crop calendars. | ||
| - Updates fire model with various improvements, including default parameterization against climate reanalysis from CRU-JRA instead of GSWP. | ||
| - FATES compsets can now be run with transient land use. | ||
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| Changes to CTSM Infrastructure: | ||
| =============================== | ||
| These changes were needed ahead of the CESM3 capability/functionality "chill". For `clm6_0` physics these options are now turned on by default, in addition to Sturm snow and excess ice. | ||
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| - manage_externals removed and replaced by git-fleximod | ||
| - Ability to handle CAM7 in LND_TUNING_MODE | ||
| ## Changes to CTSM infrastructure | ||
| - `manage_externals` removed and replaced by `git-fleximod` | ||
| - Ability to handle CAM7 in `LND_TUNING_MODE` | ||
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| Changes to CTSM Answers: | ||
| ======================== | ||
| ## Changes to CTSM answers | ||
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| Changes to defaults for clm6_0 physics: | ||
| Changes to defaults for `clm6_0` physics: | ||
| - Urban explicit A/C turned on | ||
| - Snow thermal conductivity is now Sturm_1997 | ||
| - New IC file for f09 1850 | ||
| - Snow thermal conductivity method is now `Sturm_1997` | ||
| - New initial conditions file for f09 ("1-degree") 1850, with more in progress | ||
| - New crop calendars | ||
| - Dust emissions is now Leung_2023 | ||
| - Dust emissions method is now `Leung_2023` | ||
| - Excess ice is turned on | ||
| - Updates to MEGAN for BVOC's | ||
| - Updates to MEGAN for BVOCs | ||
| - Updates to BGC fire method | ||
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| Changes for all physics versions: | ||
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| - Parameter files updated | ||
| - FATES parameter file updated | ||
| - Glacier region 1 is now undefined | ||
| - Update in FATES transient Land use | ||
| - Update in FATES transient land use | ||
| - Pass active glacier (CISM) runoff directly to river model (MOSART) | ||
| - Add the option for using matrix for Carbon/Nitrogen BGC spinup | ||
| - Add the option for using Matrix CN method for Carbon/Nitrogen BGC spinup | ||
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| New surface datasets: | ||
| ===================== | ||
| ## New surface datasets | ||
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| - With new surface datasets the following GLC fields have region "1" set to UNSET: | ||
| glacier_region_behavior, glacier_region_melt_behavior, glacier_region_ice_runoff_behavior | ||
| - With new surface datasets the following GLC fields have region "1" set to UNSET: glacier_region_behavior, glacier_region_melt_behavior, glacier_region_ice_runoff_behavior | ||
| - Updates to allow creating transient landuse timeseries files going back to 1700. | ||
| - Fix an important bug on soil fields that was there since ctsm5.2.0. This results in mksurfdata_esmf now giving identical answers with a change in number of processors, as it should. | ||
| - Add in creation of ne0np4.POLARCAP.ne30x4 surface datasets. | ||
| - Add version to the surface datasets. | ||
| - Remove the --hires_pft option from mksurfdata_esmf as we don't have the datasets for it. | ||
| - Remove VIC fields from surface datasets. | ||
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| New input datasets to mksurfdata_esmf: | ||
| ====================================== | ||
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| - Updates in PFT/LAI/soil-color raw datasets (now from the TRENDY2024 timeseries that ends in 2023), as well as two fire datasets (AG fire, peatland), and the glacier behavior dataset. | ||
| - Fix an important bug on soil fields that was there since `ctsm5.2.0`. This has the side effect of `mksurfdata_esmf` now giving identical answers with a change in number of processors, as it should. | ||
| - Surface datasets now provided for the `ne0np4.POLARCAP.ne30x4` grid. | ||
| - Surface datasets now have their version number embedded to prevent mismatch of surface dataset and CTSM version. | ||
| - Remove the `--hires_pft` option from `mksurfdata_esmf` as we don't have the datasets for it. | ||
| - Remove `VIC` fields from surface datasets. | ||
| - Updates to input datasets in PFT/LAI/soil-color raw datasets (now from the TRENDY2024 timeseries that ends in 2023), as well as two fire datasets (crop fire peak month, peatland fraction), and the glacier behavior dataset. | ||
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