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NGEET / E3SM

Energy Exascale Earth System Model source code. NOTE: use "maint" branches for your work. Head of master is not validated.
https://e3sm.org
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Enable HLM to create multiple columns for the vegetated landunit #2

Open glemieux opened 6 months ago

glemieux commented 6 months ago

The current model assumes a single column for the vegetated landunit, which is added upon gridcell initliazation: https://github.com/NGEET/E3SM/blob/67abd002e90036f0c0d7baeb10b8a55a2965e7a7/components/elm/src/main/initGridCellsMod.F90#L347-L348

We will need to allow multiple soil columns for a vegetated land unit to be added during initialization such that when we have disturbance of the soil we move the appropriate patches and their area to the appropriate time-since-fire age class bin column. This movement will need to be triggered by a disturbance mechanism similar to what we do with fates.

This will require updating the column weighting for the relevant upstream hierarchical unit: https://github.com/NGEET/E3SM/blob/67abd002e90036f0c0d7baeb10b8a55a2965e7a7/components/elm/src/data_types/ColumnType.F90#L34-L40 

### Tasks
- [ ] https://github.com/NGEET/E3SM/issues/3
- [ ] https://github.com/NGEET/E3SM/issues/4
- [ ] https://github.com/NGEET/E3SM/issues/6
- [ ] https://github.com/NGEET/E3SM/issues/7
- [ ] https://github.com/NGEET/E3SM/issues/12
glemieux commented 3 months ago

Not that currently all calls to add_column take place in initGridCellsMod via different set_landunit_... calls. These are all wrapped up in the initGridCells subroutine: https://github.com/NGEET/E3SM/blob/67abd002e90036f0c0d7baeb10b8a55a2965e7a7/components/elm/src/main/initGridCellsMod.F90#L138-L140