Emissions: combinations of sector-species: do we need more tags?

[jkikstra]

In ScenarioMIP, we find that not all sector-species combinations make equally sense.

Should we therefore replace the emissions-level-1 / 2 / 3 tag list with another set of tag lists? This would be a bit of work to figure out, but would reduce the list of redundant variables - as we would expect quite some variables to be zero.

Current best guess / expectation of a sensible sector - sector mapping is available in this sheet (sheet: "IAMC variables"). It's based on what is available and non-zero in CEDS.

FYI @IAMconsortium/common-definitions-emissions @gidden (h/t @VassilisDaioglou)

E.g., in CMIP6 there was no BC|Agriculture.

For convenience to compare, the list in CMIP6 emissions (a good place to start) was:

CMIP6 Emissions|BC

CMIP6 Emissions|BC|Agricultural Waste Burning CMIP6 Emissions|BC|Aircraft CMIP6 Emissions|BC|Energy Sector CMIP6 Emissions|BC|Forest Burning CMIP6 Emissions|BC|Grassland Burning CMIP6 Emissions|BC|Industrial Sector CMIP6 Emissions|BC|International Shipping CMIP6 Emissions|BC|Peat Burning CMIP6 Emissions|BC|Residential Commercial Other CMIP6 Emissions|BC|Transportation Sector CMIP6 Emissions|BC|Waste CMIP6 Emissions|C2F6 CMIP6 Emissions|CF4 CMIP6 Emissions|CH4 CMIP6 Emissions|CH4|Agricultural Waste Burning CMIP6 Emissions|CH4|Agriculture CMIP6 Emissions|CH4|Energy Sector CMIP6 Emissions|CH4|Forest Burning CMIP6 Emissions|CH4|Grassland Burning CMIP6 Emissions|CH4|Industrial Sector CMIP6 Emissions|CH4|International Shipping CMIP6 Emissions|CH4|Peat Burning CMIP6 Emissions|CH4|Residential Commercial Other CMIP6 Emissions|CH4|Transportation Sector CMIP6 Emissions|CH4|Waste CMIP6 Emissions|CO CMIP6 Emissions|CO2 CMIP6 Emissions|CO2|AFOLU CMIP6 Emissions|CO2|Aircraft CMIP6 Emissions|CO2|Energy Sector CMIP6 Emissions|CO2|Industrial Sector CMIP6 Emissions|CO2|International Shipping CMIP6 Emissions|CO2|Residential Commercial Other CMIP6 Emissions|CO2|Solvents Production and Application CMIP6 Emissions|CO2|Transportation Sector CMIP6 Emissions|CO2|Waste CMIP6 Emissions|CO|Agricultural Waste Burning CMIP6 Emissions|CO|Aircraft CMIP6 Emissions|CO|Energy Sector CMIP6 Emissions|CO|Forest Burning CMIP6 Emissions|CO|Grassland Burning CMIP6 Emissions|CO|Industrial Sector CMIP6 Emissions|CO|International Shipping CMIP6 Emissions|CO|Peat Burning CMIP6 Emissions|CO|Residential Commercial Other CMIP6 Emissions|CO|Transportation Sector CMIP6 Emissions|CO|Waste CMIP6 Emissions|HFC CMIP6 Emissions|N2O CMIP6 Emissions|NH3 CMIP6 Emissions|NH3|Agricultural Waste Burning CMIP6 Emissions|NH3|Agriculture CMIP6 Emissions|NH3|Aircraft CMIP6 Emissions|NH3|Energy Sector CMIP6 Emissions|NH3|Forest Burning CMIP6 Emissions|NH3|Grassland Burning CMIP6 Emissions|NH3|Industrial Sector CMIP6 Emissions|NH3|International Shipping CMIP6 Emissions|NH3|Peat Burning CMIP6 Emissions|NH3|Residential Commercial Other CMIP6 Emissions|NH3|Transportation Sector CMIP6 Emissions|NH3|Waste CMIP6 Emissions|NOx CMIP6 Emissions|NOx|Agricultural Waste Burning CMIP6 Emissions|NOx|Agriculture CMIP6 Emissions|NOx|Aircraft CMIP6 Emissions|NOx|Energy Sector CMIP6 Emissions|NOx|Forest Burning CMIP6 Emissions|NOx|Grassland Burning CMIP6 Emissions|NOx|Industrial Sector CMIP6 Emissions|NOx|International Shipping CMIP6 Emissions|NOx|Peat Burning CMIP6 Emissions|NOx|Residential Commercial Other CMIP6 Emissions|NOx|Transportation Sector CMIP6 Emissions|NOx|Waste CMIP6 Emissions|OC CMIP6 Emissions|OC|Agricultural Waste Burning CMIP6 Emissions|OC|Aircraft CMIP6 Emissions|OC|Energy Sector CMIP6 Emissions|OC|Forest Burning CMIP6 Emissions|OC|Grassland Burning CMIP6 Emissions|OC|Industrial Sector CMIP6 Emissions|OC|International Shipping CMIP6 Emissions|OC|Peat Burning CMIP6 Emissions|OC|Residential Commercial Other CMIP6 Emissions|OC|Transportation Sector CMIP6 Emissions|OC|Waste CMIP6 Emissions|SF6 CMIP6 Emissions|Sulfur CMIP6 Emissions|Sulfur|Agricultural Waste Burning CMIP6 Emissions|Sulfur|Aircraft CMIP6 Emissions|Sulfur|Energy Sector CMIP6 Emissions|Sulfur|Forest Burning CMIP6 Emissions|Sulfur|Grassland Burning CMIP6 Emissions|Sulfur|Industrial Sector CMIP6 Emissions|Sulfur|International Shipping CMIP6 Emissions|Sulfur|Peat Burning CMIP6 Emissions|Sulfur|Residential Commercial Other CMIP6 Emissions|Sulfur|Transportation Sector CMIP6 Emissions|Sulfur|Waste CMIP6 Emissions|VOC CMIP6 Emissions|VOC|Agricultural Waste Burning CMIP6 Emissions|VOC|Aircraft CMIP6 Emissions|VOC|Energy Sector CMIP6 Emissions|VOC|Forest Burning CMIP6 Emissions|VOC|Grassland Burning CMIP6 Emissions|VOC|Industrial Sector CMIP6 Emissions|VOC|International Shipping CMIP6 Emissions|VOC|Peat Burning CMIP6 Emissions|VOC|Residential Commercial Other CMIP6 Emissions|VOC|Solvents Production and Application CMIP6 Emissions|VOC|Transportation Sector CMIP6 Emissions|VOC|Waste

[danielhuppmann]

@dc-almeida and I are working on nomenclature improvements to have more flexibility, one of those is https://github.com/IAMconsortium/nomenclature/issues/416.

@jkikstra, could you please let us know which combinations should be removed from the current list of emissions variables?

[danielhuppmann]

In the meantime, teams can just exclude irrelevant combinations from their reporting, no need to put millions of zeros in their output spreadsheets.

[jkikstra]

@jkikstra, could you please let us know which combinations should be removed from the current list of emissions variables?

Sorry, at the moment no time for this. But I have an updated list of the expected sector-species combinations in this sheet (sheet: "IAMC variables"). You would need to compare this to the current yaml data.

In the meantime, teams can just exclude irrelevant combinations from their reporting, no need to put millions of zeros in their output spreadsheets.

agreed. could you add that as a sentence to the announcement when the new template goes out, after merging #188? Maybe along with a note that a few changes (such as the structuring/hierarchy of fires variables) might still change at a later stage; and that we're open for feedback on the template in general.