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ESCOMP / CAM

Community Atmosphere Model
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PUMAS Microphysics Updates and Fixes #593

Closed andrewgettelman closed 2 years ago

andrewgettelman commented 2 years ago

Issue Type

Code Clean-up

Issue Description

This corresponds to PUMAS issue: https://github.com/ESCOMP/PUMAS/issues/38 Associated with CAM PR https://github.com/ESCOMP/CAM/pull/597 and PUMAS PR https://github.com/ESCOMP/PUMAS/pull/41

I am readying code for PUMAS that does several things:

  1. Adds number tendencies to PUMAS for output through CAM history
  2. Cleans up numerics for the vapor deposition onto snow limiters (this was probably a bug in the previous version)
  3. Changes Immersion Freezing from the CNT version in CAM6 BACK to the old Bigg formulation in CAM5

Item 3 is necessary because immersion freezing from CNT is not bounded and does not work well at long timesteps (>60s or les). So it was having a massive influence on ice number. Instead we will go back to the Bigg formulation from CAM5, at least for now.

Code will be ready soon: cam and PUMAS code. It's pretty straightforward from an SE perspective. It will change answers. I will try to tune back the climate to make it look like standard CAM6.

Will this change answers?

Yes

Will you be implementing this yourself?

Yes, but I will need some help

andrewgettelman commented 2 years ago

Associated with CAM PR #597 and PUMAS PR https://github.com/ESCOMP/PUMAS/pull/41