M. Amann G. Klaassen, R. Mechler, J. Cofala, C. Heyes International Institute for Applied Systems Analysis (IIASA) Modelling synergies and trade-offs between mitigation of GHGs and air pollution with the RAINS model
Linkages between air pollution and climate Air pollutants have radiative forcing: Ozone controls serve air quality and climate concerns Aerosols/PM damage human health and influence climate Environmental impacts of CC and AP are interlinked Synergies and trade-offs in emission controls
A multi-pollutant/multi-effect framework extended to GHGs PMSO 2 NO x VOCNH 3 CO 2 CH 4 N2ON2O CFCs HFCs SF 6 Health impacts: PM O 3 Vegetation damage: O 3 Acidification Eutrophication Radiative forcing: - direct - via aerosols - via OH
Introducing GHGs into RAINS Develop cost curves for GHGs (CO 2, CH 4, N 2 O, HFC, PFC, SF 6 ) in addition to SO 2, NO x, VOC, NH 3, PM, (BC, CO) Country-by-country, medium-term up to 2030 Include structural changes as means for emission controls Capture synergies and trade-offs
CO 2 control options in the power sector Shift from to GasHydro Bio- mass Wind onshore Wind offshore Solar PV Other renew. Carbon capture Brown coalxxxxxxx Hard coalxxxxxxxx Heavy fuel oil xxxxxxx Natural gasxxxxxx
CO 2 cost curve Germany, power sector, 2020
Options to control CH 4 TechnologyCost (€/tCH4) TechnologyCost (€/tCH 4 ) Paper recycling-1750 Further gas use in gas extraction 7 Improved feeding-1231 Housing adaptation15 Increased gas flaring-377 Alternative rice strains45 Improved I&M for gas distribution -200 Digestion66 Gas use in oil extract.-187 Integrated waste water systems100 Recovery in coal mines-67 Doubling leak control1203 Gas use in gas extraction -57 Waste diversion1438 Ban of agricultural waste burning 0 Replace gray cast iron network2378 Propionate precursors4250
CH 4 cost curve France, 2020
First preliminary results
Data and assumptions Latest RAINS energy- & cost data For EU-25, excluding Cyprus and Malta (EU-23) For 2020
Reference case (REF) CAFE “without climate measures” energy projections for 2020 Air pollution control according to recent EU legislation (NEC Directive, LCP Directive, Auto-Oil, etc.)
Scenario 1: Fuel-shift CO 2 control in the power sector Cost-effective fuel shift measures to reduce CO 2 emissions in the power sector by 15 % Subject to exogenous electricity demand
Fuel shifts applied to reduce CO 2 emissions
CO 2 [Mt ] NO x [kt] SO 2 [kt] PM2.5 [kt] Changes in emissions compared to REF, EU Fuel-shiftMulti-gasBio-fuel Fuel-shiftMulti-gasBio-fuel Fuel-shiftMulti-gasBio-fuel Fuel-shiftMulti-gasBio-fuel
Differences in premature deaths (cases/year, compared to REF) Fuel-shiftMulti-gasBio-fuel
Emission control costs (billion €/yr, compared to REF) Control ofFuel-shift scenario CO CH 4 0 GHGs+3.5 SO NO x -0.3 PM-0.6 Air pollutants-2.3 Total+1.2
Scenario 2: Multi-gas Multi-GHG control In each country, the equivalent CO 2 reductions of the Fuel-shift scenario are achieved with CO 2 and CH 4 controls
CH 4 reduction measures applied in the Multi-gas scenario
Fuel shifts applied in the Fuel-shift and Multi-gas scenarios
CO 2 [Mt ] NO x [kt] SO 2 [kt] PM2.5 [kt] Changes in emissions compared to REF, EU-23 CH Fuel-shiftMulti-gasBio-fuel Fuel-shiftMulti-gasBio-fuel Fuel-shiftMulti-gasBio-fuel Fuel-shiftMulti-gasBio-fuel CH 4
Differences in premature deaths (cases/year, compared to REF) Fuel-shiftMulti-gasBio-fuel
Emission control costs (billion €/yr, compared to REF) Control ofFuel-shiftMulti-gas CO CH GHGs SO NO x PM Air pollutants Total
Scenario 3: Bio-fuels Increased biomass use in households Shift to biomass use for domestic heating: 10% of light fuel oil is replaced by biomass
CO 2 [Mt ] NO x [kt] SO 2 [kt] PM2.5 [kt] Changes in emissions compared to REF, EU-23 CH 4
Differences in premature deaths (cases/year, compared to REF)
Emission control costs (billion €/yr, compared to REF) Control ofBio-fuel scenario CO CH 4 0 GHGs+0.6 SO NO x 0 PM0 Air pollutants-0.1 Total0.5
Further work Finalization of cost curves for other GHGs Optimization tool: –Separate and joint optimization of emission controls for air pollutants and GHGs: –With constraints (targets) for air quality –With constraints (targets) for radiative forcing/GWP –Simulation of emission trading, emission taxes Implementation for developing countries
Conclusions (1) Important synergies and trade-offs exist between air pollution control and GHG mitigation Integration can maximize synergies and avoid trade-offs To be truly cost-effective, climate policies have to account for cost savings of reducing traditional air pollutants - both for industrialized and developing countries
Conclusions (2) Multi-pollutant/multi-effect/multi-scale strategies: offer more flexibility and increased potential for economic efficiency harness multiple benefits of measures when costs are increasing connect global long-term climate objectives with concrete local near-term benefits