Global EOC budget with peaking carbon price #2265
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merfort
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Jan 8, 2026
main.gms
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| *' * (9): [requires 45_carbonprice = functionalForm and emiscen = 9] global: iterative adjustment of CO2 tax based on economy-wide CO2 cumulative emission peak budget, for runs with emission budget or CO2 tax constraints. Features: 1) after the year when budget peaks, CO2 tax has an annual increase by cm_taxCO2_IncAfterPeakBudgYr, 2) automatically shifts cm_peakBudgYr to find the correct year of budget peaking for a given budget. [see 45_carbonprice/functionalForm/postsolve.gms for direct algorithm] | ||
| parameter | ||
| cm_taxCO2_Shape "Only used with [functionalFormRegi], determines whether the carbon price increases until 2100 or is constant as of the exogenously set cm_peakYear" | ||
| cm_taxCO2_Shape "Only used with [functionalFormRegi and functionalForm if EOC budget], determines whether the carbon price increases until 2100 or is constant as of the exogenously set cm_peakYear" |
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Can you specify what "if EOC budget" means in detail? Which switch has to be set to what value?
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Ah, ok, I guess it is cm_taxCO2_Shape eq 2 :)
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Good point, I adjusted it to cm_iterative_target_adj = 5
merfort
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Jan 8, 2026
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Thanks, Tabea :)
I only have that minor comment on the description
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Looks good, thank you! |
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Purpose of this PR
This PR adds the option to have a global EOC budget with a carbon price peaking in the year specified by
cm_peakYear.Analogous to the
functionalFormRegirealization, this can be achieved by settingcm_taxCO2_Shape = 2andcm_peakYear = 20XX.Note: the peaking year does not adjust endogenously
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make test) after my final commit and all tests pass (FAIL 0)remind2if and where it was neededforbiddenColumnNamesin readCheckScenarioConfig.R in case the PR leads to deprecated switchesCHANGELOG.mdcorrectly (added, changed, fixed, removed, input data/calibration)Further information (optional)