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Copy file name to clipboardExpand all lines: WhatsNewInCTSM5.4.md
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@@ -37,21 +37,23 @@ Changes to defaults for \`clm6\` physics:
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* See “Changes to FATES and the FATES parameter file” below.
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* Namelist defaults change so that
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* use\_c13/use\_c14 are on only for HistClm60Bgc compsets with CRUJRA2024 or CAM7 forcing; examples of when use\_c13/use\_c14 are now off include SSP and single-point compsets, as well as cases using older forcings, such as CAM6, GSWP3v1, Qian, and CRUv7
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* when use\_c13 or use\_c14 is on, turn on the corresponding time series file
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* when use\_c13 or use\_c14 is on, turn on the corresponding time series file (responding to the CLM_CMIP_ERA flag)
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* C13/C14 CMIP7 data is done using streams with new namelist variables (stream_*_atm_c13, stream_*_atm_c14)
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* irrigation is on for transient cases (1850-2000, 1850-2100, but not for clm4\_5).
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Changes for all physics versions:
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* Parameters updated: Added MIMICS parameter \`mimics\_fi\` (fraction of litter inputs that bypass litter pools, directly contributing to SOM) and updated other MIMICS parameters (https://github.com/ESCOMP/CTSM/pull/2365) to remove NPP control on turnover, fix density dependent control on turnover, add litterfall fluxes that bypass litter pools and contribute directly to soil organic matter.
* New surface datasets and landuse timeseries files (see “surface datasets” section below).
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* CMIP7 C13/C14 atmospheric timeseries data
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## Heads up
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* History tapes now split into two files from hX to hXi and hXa, where X is the tape number (e.g. h0i/h0a) and where "i" stands for history file containing instantaneous fields, while "a" stands for history file containing non-instantaneous fields. Details in the “history files” section below and in the PRs https://github.com/ESCOMP/ctsm/pull/2445https://github.com/ESCOMP/MOSART/pull/117https://github.com/ESCOMP/RTM/pull/61 and the corresponding issues.
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* Adding time to 1d weighting fields in transient simulations PR https://github.com/ESCOMP/CTSM/pull/3328
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* Regarding CMIP7 vs. CMIP6 inputs:
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*We supply only CMIP7 C13/C14 isotope datasets, so these get used regardless of CLM\_CMIP\_ERA setting.
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* C13/C14 isotope datasets are the new CMIP7 datasets using streams, while when CLM_CMIP_ERA==cmip6, the older cmip6 files are used
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* We supply only CMIP7 population density with clm6 physics in non-SSP cases, because the fire model is calibrated to that; conversely, we supply only CMIP6 population density for pre-clm6 physics and for SSP cases.
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* We supply only CESM2 nitrogen deposition (ndep), so this gets used regardless of CLM\_CMIP\_ERA setting.
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* For DATM we supply only CMIP6 aerosols.
@@ -147,4 +149,3 @@ The former is calculated as a function of the latter and can be time-evolving de
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* ne30 with \`Clm60BgcCropCruJra\`: https://github.com/NCAR/LMWG_dev/issues/123 (123\_HIST\_popDens)
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