Topic: MACC curvesSubscribe | Previous | Next
Robert Brecha 9/27/2024
Hi Community - I'm trying to construct a MACCurve from a baseline and a mitigation scenario. The latter clearly shows differences in technologies used and in emissions. However, when I try to determine the MACC, my output is just one block at $12.5/tonne and a total of ~2.95MtCO2. I don't get the breakdown by measure and GHG emissions reductions that I would expect. Can provide more details, but was first wondering if I'm missing something obvious, like a "level" option to select aggregation or disaggregation.
Charlie Heaps 9/28/2024
The MACC curve plots separate scenarios relative to a baseline scenario. In the General: Scenarios screen make sure you check the box marked “Include in MACC” for each scenario you want to include in your MACC.
Robert Brecha 9/28/2024
Thanks, Charlie - I see that I was thinking about this incorrectly, that it's the scenarios that are compared, not the individual measures within the scenarios. So each individual measure I want to implement needs its own scenario, which can then be included in the MACC analysis.
Charlie Heaps 9/28/2024
That’s right Bob. What you can do is make “mini scenarios”, each of which reflects one measure. These can then be combined using LEAP’s multiple inheritance features in the Scenarios screen once you want to do integrated modeling.
MACCs won’t capture all the possible interactions among measures the way an integrated scenario can, but they can still sometimes be useful for roughly prioritizing measures. Although many have reasonably argued that prioritizing the cheapest measures doesn’t necessarily make sense when thinking about how to reach deep decarbonization targets.
PS - there are two methods in LEAP For calculating MACCs: full and partial. The full method captures more of the possible interactions among measures, but is MUCH slower.