Fix negative gross emissions by excluding emissions accounted in other sectors via CCU #666
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added 4 commits
October 10, 2024 09:31
…CCU|... to contain carbon from fossil synfuels that gets sequestered in the industry sector. These emissions are accounted negative but are not CDR as they store fossil CO2. This is necssary as the carbon from fossil synfuels has been accounted upstream with the CO2 capture sector. These emissions are then excluded from gross emissions as well (as for CDR).
… cs2 and summation checks
fbenke-pik
approved these changes
Oct 10, 2024
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This fixes the issue that gross CO2 emissions can sometimes become negative because they still include negative emissions from sequestering carbon from fossil synfuels in industry, which are not accounted as CDR. These carbon flows have to be accounted negative in the sector that stores synfuel carbon because this carbon has already been accounted as emissions upstream in the sector that captured the carbon initially.
It adds the emissions variables
Emi|CO2|Accounted in Other Sectors via CCU|Energy|Industry|Fossil Synfuel CCS (Mt CO2/yr)Emi|CO2|Accounted in Other Sectors via CCU|Energy|Industry|Fossil Synfuel Plastics Sequestration (Mt CO2/yr)and their sum
Emi|CO2|Accounted in Other Sectors via CCU|Energy|Industry (Mt CO2/yr).The latter is then also subtracted (as for CDR) from all net emissions variables to obtain gross emissions variables. After this change all gross emissions variables are >=0 in this run:
/p/projects/remind/modeltests/remind/output/SSP2-EU21-PkBudg500-AMT_2024-10-05_02.31.41(see
SSP2-EU21-PkBudg500-AMT_newMif.miffor output of updated reporting).The variables are also added to the summation checks and cs2 plots.
Usually, these emissions are quite small. However, they still need to be added to the project mappings somewhere.
In addition, this PR also fixes a minor naming error with the LULUCF national accounting emissions variables that led to failing summation checks.