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Feature/pcolarco/carbon chem loss upd #266

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merged 7 commits into from
Sep 27, 2024

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@pcolarco pcolarco commented Mar 4, 2024

This feature implements two changes:

  • It changes the formulation of the hydrophobic to hydrophilic conversion for carbon species, now defined by a time scale specified in the instance RC file. This is now specified by providing an e-folding time in days. This moves the time constant from outside the fortran to the run-time configurable RC file. This is not quite zero-diff with original code because of the precision of the specification, but testing shows nearly zero-diff result.

  • Also now present in the carbon instance RC files is a run-time configurable optional parameterized loss rate (e-folding time in days) per species and per mode. Default value for all is set to "-1" which means no use of this function. It has been tested separately for hydrophilic brown carbon (-1 6.0) which favorably improves OA:BC ratio for southern African biomass burning. This requires additional rescaling of BB emissions (increase scaling from 0.778->0.9 for BC and 0.778->1.25 for BR) to compensate for increased loss (in second case) and to improve simulation of BC (in first case). This requires further testing before recommending configuration changes, but as defined in default it is zero-diff.

…sion to resource file; add hooks for ad hoc chemical loss mechanism per tracer; update emissions under AMIP (only)
@pcolarco pcolarco added the enhancement New feature or request label Mar 4, 2024
@pcolarco pcolarco requested a review from a team as a code owner March 4, 2024 16:55
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github-actions bot commented Mar 4, 2024

Label error. Requires at least 1 of: 0 diff, 0 diff trivial, Non 0-diff, 0 diff structural, 0-diff trivial, Not 0-diff, 0-diff, automatic, 0-diff uncoupled. Found: enhancement

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github-actions bot commented Mar 4, 2024

Label error. Requires at least 1 of: 0 diff, 0 diff trivial, Non 0-diff, 0 diff structural, 0-diff trivial, Not 0-diff, 0-diff, automatic, 0-diff uncoupled. Found: enhancement

@pcolarco pcolarco added the Non 0-diff The changes in this pull request are non-zero-diff label Mar 4, 2024
@pcolarco pcolarco changed the base branch from main to develop March 4, 2024 18:10
@vbuchard vbuchard merged commit b07e2d3 into develop Sep 27, 2024
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@vbuchard vbuchard deleted the feature/pcolarco/carbonChemLossUpd branch September 27, 2024 17:34
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4 participants