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v2.2.0-alpha.1: Carbon and Nitrogen in Sync preview

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@dlebauer dlebauer released this 19 Aug 18:12
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v2.2.0-alpha.1
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SIPNET 2.2.0-alpha.1 — Carbon and Nitrogen in Sync preview

This release improves SIPNET’s carbon and nitrogen accounting and adds interactive tools for exploring model outputs and internal debug logs.

Highlights include:

  • More consistent plant carbon allocation and nitrogen accounting (#359).
  • Nitrogen resorption during leaf senescence and biomass loss, with a nitrogen storage pool used before fixation and uptake (#337, #359).
  • Plant mortality detection, including transfer of remaining biomass to litter and soil pools (#359).
  • Leaf-on growth limited by both carbon and nitrogen availability (#337).
  • Optional soil carbon saturation (#301).
  • New interactive viewers for model output and internal debug logs (#317, #352, #357).
  • Improved event reporting and clearer file-prefix configuration (#349, #320).

When upgrading:

  • events.out now reports pool changes rather than flux rates.
  • Existing parameter files require leafOnReallocFrac;
  • runs with the nitrogen cycle enabled also require plantStorageNInit and leafNResorptionFrac. When site-specific values are unavailable, suggested starting values are plantStorageNInit 0.0 and leafNResorptionFrac 0.5.
  • Restart checkpoints written by v2.1 are not compatible.
  • Parameters calibrated with earlier versions of SIPNET must be revalidated before scientific use and may require recalibration because the accounting changes can affect simulated biomass and carbon and nitrogen fluxes.

See the full changelog for complete details.

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