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@LaviniaBaumstark LaviniaBaumstark commented Jan 20, 2026

Purpose of this PR

adjust scenario_config.csv to fit NGFS needs, in concrete:

  • delete SSP2-PkBudg500, SSP2-EU21-NDC, SSP2-EU21-NDCsy2025, SSP2-EU21-PkBudg500
  • add SSP2-PkBudg750, SSP2-EU21-PkBudg750
  • adjusted: SSP1-PkBudg650 -> SSP1-PkBudg750

Type of change

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Parts concerned

  • ◻️ GAMS Code
  • ◻️ R-scripts
  • ◻️ Documentation (GAMS incode documentation, comments, tutorials)
  • ◻️ Input data / CES parameters
  • ◻️ Tests, CI/CD (continuous integration/deployment)
  • ☑️ Configuration (switches in main.gms, default.cfg, and scenario_config*.csv files)
  • ◻️ Other (please give a description)

Impact

  • ◻️ Bug fix
  • ◻️ Refactoring
  • ◻️ New feature
  • ◻️ Change of parameter values or input data (including CES parameters)
  • ☑️ Minor change (default scenarios show only small differences)
  • ◻️ Fundamental change of results of default scenarios

Checklist

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In the end all checkboxes must be ticked before you can merge
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  • I executed the automated model tests (make test) after my final commit and all tests pass (FAIL 0)
  • I adjusted the reporting in remind2 if and where it was needed
  • I adjusted the madrat packages (mrremind and other packages involved) for input data generation if and where it was needed
  • My code follows the coding etiquette
  • I explained my changes within the PR, particularly in hard-to-understand areas
  • I checked that the in-code documentation is up-to-date
  • I adjusted forbiddenColumnNames in readCheckScenarioConfig.R in case the PR leads to deprecated switches
  • I updated the CHANGELOG.md correctly (added, changed, fixed, removed, input data/calibration)

Further information (optional)

  • Runs with these changes are here:
  • Comparison of results (what changes by this PR?):

SSP2-NPi2025;1,AMT,2;;;;;;;;;0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;2005;;;;;SSP2-NPi2025: This National Policies Implemented (NPi) scenario follows the Shared Socioeconomic Pathways 2 called Middle of the Road. The NPi assumes that policies fail to achieve NDC targets in 2030. Instead, carbon prices are assumed to grow and converge more slowly, leading to emissions trajectories in line with bottom-up studies on the effect of currently implemented policies.
SSP2-PkBudg500;1,AMT,2;;;;;rcp20;globallyOptimal;;;9;500;;functionalForm;;200;2045;5;;;;;;;;;;;;;2050.GLO 0.9;NDC;;2030.EUR_regi.tax.t.FE_wo_b_wo_n_e.all 1.2809;;;;;;;;;;;;2;;;;;;;Elec_Push;Mix4ICEban;1;2030;;SSP2-NPi2025;;SSP2-NPi2025;SSP2-PkBudg500: This climate policy scenario follows the Shared Socioeconomic Pathways 2 called Middle of the Road. The stylized climate policy scenario assumes a peak budget of 500 Gt CO2 on total CO2 emissions from 2015 to 2100. This is a 1.5C scenario, peak warming is allowed to be well below 1.5C at median climate sensitivity but returns to values below 1.5C in at least 67 % of scenarios by the end of the century.
SSP2-PkBudg650;1,AMT,2;;;;;rcp20;globallyOptimal;;;9;650;;functionalForm;;100;2055;6;;;;;;;;;;;;;2050.GLO 0.9;NDC;;2030.EUR_regi.tax.t.FE_wo_b_wo_n_e.all 1.2809;;;;;;;;;;;;2;;;;;;;Elec_Push;Mix4ICEban;1;2030;;SSP2-NPi2025;;SSP2-NPi2025;SSP2-PkBudg650: This climate policy scenario follows the Shared Socioeconomic Pathways 2 called Middle of the Road. The stylized climate policy scenario assumes a peak budget of 650 Gt CO2 on total CO2 emissions from 2015 to 2100. This is a 1.5C scenario, peak warming is allowed to be at or slightly above 1.5C at median climate sensitivity but returns to values below 1.5C in at least 67 % of scenarios by the end of the century.
SSP2-PkBudg750;1,AMT,2;;;;;rcp20;globallyOptimal;;;9;750;;functionalForm;;100;2055;6;;;;;;;;;;;;;2050.GLO 0.9;NDC;;2030.EUR_regi.tax.t.FE_wo_b_wo_n_e.all 1.2809;;;;;;;;;;;;2;;;;;;;Elec_Push;Mix4ICEban;1;2030;;SSP2-NPi2025;;SSP2-NPi2025;SSP2-PkBudg750: This climate policy scenario follows the Shared Socioeconomic Pathways 2 called Middle of the Road. The stylized climate policy scenario assumes a peak budget of 650 Gt CO2 on total CO2 emissions from 2015 to 2100. This is a 1.5C scenario, peak warming is allowed to be at or slightly above 1.5C at median climate sensitivity but returns to values below 1.5C in at least 67 % of scenarios by the end of the century.
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scenario assumes a peak budget of 650 Gt CO2 on total CO2 emissions from 2015 to 2100. This is a 1.5C scenario, peak warming is allowed to be at or slightly above 1.5C

The descriptions are not valid anymore, maybe we should update or remove them?

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sure, thought, I did it

SSP2-rollBack;1,AMT,2;;;;;;;;;0;;;none;;;;;0;;;1;;;;;;;;;;none;;;;;;;;;;;;;;;;;;;;;;Mix1;1;2030;;SSP2-NPi2025;;SSP2-NPi2025;SSP2-rollBack: This rollback of climate policy scenario follows the Shared Socioeconomic Pathways 3 called Middle of the Road.
# EU21 SSP2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
SSP2-EU21-NPi-calibrate;calibrate,calibrateSSP2;calibrate;14;./config/regionmapping_21_EU11.csv;./config/extramapping_EU27.csv;;;;;;;;NPi;;;;;;;;;;;;;;;;;;NPi2018;;;;;;;;;;;;;;;;;;;;;;Mix1;;2005;;;;;SSP2-EU21-calibration: This baseline scenario follows the Shared Socioeconomic Pathways 2 called Middle of the Road.
SSP2-EU21-NDC;1,AMT,2;;;./config/regionmapping_21_EU11.csv;./config/extramapping_EU27.csv;;globallyOptimal;;;3;;;NDC;;;;;;;;;;;;;;;;;;NDC;;2030.EUR_regi.tax.t.FE_wo_b_wo_n_e.all 1.2809;;;;;;;;;;;;;;;;;;;;;1;2030;;SSP2-EU21-NPi2025;SSP2-EU21-NPi2025;SSP2-EU21-NPi2025;SSP2-EU21-NDC: This Nationally Determined Contribution (NDC) scenario follows the Shared Socioeconomic Pathways 2 called Middle of the Road. It assumes NPi2025 until 2025 and has start year 2030. The NDC includes all pledged policies even if not yet implemented. It assumes that the moderate and heterogeneous climate ambition reflected in the NDCs at the begining of 2021 continues over the 21st century.
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why remove this one?

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agreed on this in REMIND strategy meeting, seems not to be used

SSP1-NPi-calibrate;calibrate;calibrate;14;;;;;;;;;;NPi;;;;;;GLO 0.12, EUR_regi 0.15;;2;;;;;;5;;;;NPi2018;;;;;;SSP1;SSP1;lowOil;lowGas;lowCoal;SSP1;;4;;SSP1;;90;;forcing_SSP1;;;Mix1;;2005;;;;;SSP1-calibration: This baseline calibration scenario follows the Shared Socioeconomic Pathways 1 called Sustainability.
SSP1-NDC;1,compileInTests;;;;;;globallyOptimal;;;3;;;NDC;;;;;;GLO 0.12, EUR_regi 0.15;;2;;;;;;5;;;;NDC;;2030.EUR_regi.tax.t.FE_wo_b_wo_n_e.all 1.2809;;;;SSP1;SSP1;lowOil;lowGas;lowCoal;SSP1;;4;;SSP1;;90;;forcing_SSP1;;;;1;2030;;SSP2-NPi2025;SSP2-NPi2025;;SSP1-NDC: This Nationally Determined Contribution (NDC) scenario follows the Shared Socioeconomic Pathways 1 called Sustainability. It assumes NPi2025 until 2025 and has start year 2030. The NDC includes all pledged policies even if not yet implemented. It assumes that the moderate and heterogeneous climate ambition reflected in the NDCs at the begining of 2021 continues over the 21st century.
SSP1-NPi2025;1,AMT;;;;;;;;;0;;;;;;;;;GLO 0.12, EUR_regi 0.15;;2;;;;;;5;;;;;;;;;;SSP1;SSP1;lowOil;lowGas;lowCoal;SSP1;;4;;SSP1;;90;;forcing_SSP1;;;;1;2030;;SSP2-NPi2025;;;SSP1-NPi2025: This National Policies Implemented (NPi) scenario follows the Shared Socioeconomic Pathways 1 called Sustainability. The NPi assumes that policies fail to achieve NDC targets in 2030. Instead, carbon prices are assumed to grow and converge more slowly, leading to emissions trajectories in line with bottom-up studies on the effect of currently implemented policies.
SSP1-PkBudg650;1,AMT;;;;;rcp20;globallyOptimal;;;9;650;;functionalForm;;100;2055;6;;GLO 0.12, EUR_regi 0.15;;2;;;;;;5;;feelhpb 1.4, fehob 0.8, feheb 0.15;2050.GLO 0.9;NDC;;2030.EUR_regi.tax.t.FE_wo_b_wo_n_e.all 1.2809;;;;SSP1;SSP1;lowOil;lowGas;lowCoal;SSP1;;4;2;SSP1;;90;;forcing_SSP1;;Elec_Push;Mix4ICEban;1;2030;;SSP2-NPi2025;;;SSP1-PkBudg650: This climate policy scenario follows the Shared Socioeconomic Pathways 1 called Sustainability. The stylized climate policy scenario assumes a peak budget of 650 Gt CO2 on total CO2 emissions from 2015 to 2100. This is a 1.5C scenario, peak warming is allowed to be at or slightly above 1.5C at median climate sensitivity but returns to values below 1.5C in at least 67 % of scenarios by the end of the century.
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Why remove this one? if we have a SSP2-650 it makes sense to keep a SSP1-650 maybe? (not of them will be in ngfs though)

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we tried to keep the number of default scenarios as small as possible and last time we also only kept the "old" PkBudg500 scenario for SSP2 and SSP2-AU21 and for none other scenario

@LaviniaBaumstark LaviniaBaumstark merged commit 37551fb into remindmodel:develop Jan 20, 2026
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