Peatlands pull request

[larsonej]

Description

The general goal of these code changes is to vertically resolve the soil carbon in areas that have a lot of carbon, such as peatlands and arctic permafrost. The carbon cycle in these areas is sensitive to the amount and type of carbon susceptible to decomposition. This is generally the carbon above the water table and thawed. The major code changes involved two aspects, 1) allowing the soil carbon to be vertically resolved, and 2) making soil properties a function of the soil carbon. Along with these two major changes, there were some small changes as well.

• Changed peat soil properties to reflect literature values.
• Soil carbon pools are vertically resolved and assumed to be on top of mineral layers (IVERT)
• Soil texture can be dynamic (isoiltext) based on organic layer depth. Added 9 transition soil types between loam and peat.
• also made RH and Aw, At vertically resolved and output.
• did not make cwd vertically resolved. also do not output mean carbon values for each soil level, since this is deterministic given carbon densities, soil layer depth, and total carbon in each pool
• New phenology (case 5)based on MODIS C6, uses 4 points and double logisitc.
• New mortality (case 6) based on wind. Specifically for high arctic.
• Changed some peat albedo values in radiation driver to have higher albedo
• Changed snow albedo and density. Previous model did not account for snow compaction and thus had very deep snowpacks.

Collaborators

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• [ x] Other (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.

Testing :

• All new and existing tests passed.