4_PE_ProcessExtensions, SSP1 larger than SSP2

[CarrerF]

Hi, I have revising the dataset I have stumbled upon this issue. All the production sectors, with few exceptions, have lower targets for SSP2 (and consequently LED*) than SSP1. I had a look at the the corresponding target table does not explain the rationale behind it.

*This was also surprising to me. In some parameters (for instance 4_PE_GHGIntensityEnergySupply, RCP) have more ambitious values in terms of emission cuts. Here, LED is on SSP2 level. Where does LED stand?

[stefanpauliuk]

Hi @CarrerF, this dataset is based on a ecoinvent scenario run that is not documented. As from our conversation, we will proceed with the following steps:

• Simplfy the approach and consider change only along RCP dimension, not SSP anymore.
• Extract GHG and CED for different materials from ecoinvent and use as 4_PE and 4_EI parameters.
  • BUT: then we woud have double-counting of GHG via 4_PE and 4_EI * GHG_Intensity_Energy_Supply.
  • So we either need to exclude 4_EI from the GHG calculation or subtract it from 4_PE
  • We can introduce a toggle flag in the model config to choose between the two cases, or report separate energy and GHG flows
• Ideally, we also have a breakdown of CED into the RECC energy carriers to link them directly to the RECC energy supply scenario

[Hertwich]

Just a note of caution, the CED is an LCIA indicator that refers to how primary energy was extracted from nature. You do not know whether this was used a fuel, to produce electricity, or as a process input. I advise against using CED. I assume we have EcoInvent as a matrix? I would take the energy carrier inputs into the extensions (at least electricity). You can than do the LCA calculation (Leontief inverse - Multiplier) and thus get the electricity needed during the cradle-to-gate production of materials or a specific product.

[stefanpauliuk]

I agree @Hertwich , have prepared a proposal for building simple scenarios for material production GHG, see my email in a few minutes.

[stefanpauliuk]

Fixed during major update on how me model material production and energy supply.