https://pure.iiasa.ac.at/id/eprint/14561 2021-08-27T17:28:53Z info:eu-repo/semantics/descriptiveMetadata https://pure.iiasa.ac.at/id/eprint/14561/ The Contribution of Non-CO2 Greenhouse Gas Mitigation to Achieving Long-Term Temperature Goals Gambhir, A. Napp, T. Hawkes, A. Höglund-Isaksson, L. Winiwarter, W. Purohit, P. Wagner, F. Bernie, D. Lowe, J. This paper analyses the emissions and cost impacts of mitigation of non-CO2 greenhouse gases (GHGs) at a global level, in scenarios aimed at meeting a range of long-term temperature goals (LTTGs). The study combines an integrated assessment model (TIAM-Grantham) representing CO2 emissions (and their mitigation) from the fossil fuel combustion and industrial sectors, coupled with a model covering non-CO2 emissions (GAINS), using the latest global warming potentials from the Intergovernmental Panel on Climate Change’s Fifth Assessment Report. We illustrate that in general non-CO2 mitigation measures are less costly than CO2 mitigation measures, with the majority of their abatement potential achievable at US2005$100/tCO2e or less throughout the 21st century (compared to a marginal CO2 mitigation cost which is already greater than this by 2030 in the most stringent mitigation scenario). As a result, the total cumulative discounted cost over the period 2010–2100 (at a 5% discount rate) of limiting global average temperature change to 2.5 °C by 2100 is $48 trillion (about 1.6% of cumulative discounted GDP over the period 2010–2100) if only CO2 from the fossil fuel and industrial sectors is targeted, whereas the cost falls to $17 trillion (0.6% of GDP) by including non-CO2 GHG mitigation in the portfolio of options—a cost reduction of about 65%. The criticality of non-CO2 mitigation recommends further research, given its relatively less well-explored nature when compared to CO2 mitigation. 2017 Article PeerReviewed text en cc_by https://pure.iiasa.ac.at/id/eprint/14561/1/energies-10-00602.pdf Gambhir, A., Napp, T., Hawkes, A., Höglund-Isaksson, L. <https://pure.iiasa.ac.at/view/iiasa/128.html> ORCID: https://orcid.org/0000-0001-7514-3135 <https://orcid.org/0000-0001-7514-3135>, Winiwarter, W. <https://pure.iiasa.ac.at/view/iiasa/335.html> ORCID: https://orcid.org/0000-0001-7131-1496 <https://orcid.org/0000-0001-7131-1496>, Purohit, P. <https://pure.iiasa.ac.at/view/iiasa/239.html> ORCID: https://orcid.org/0000-0002-7265-6960 <https://orcid.org/0000-0002-7265-6960>, Wagner, F. <https://pure.iiasa.ac.at/view/iiasa/321.html> ORCID: https://orcid.org/0000-0003-3429-2374 <https://orcid.org/0000-0003-3429-2374>, Bernie, D., et al. (2017). The Contribution of Non-CO2 Greenhouse Gas Mitigation to Achieving Long-Term Temperature Goals. Energies 10 (5) e602. 10.3390/en10050602 <https://doi.org/10.3390/en10050602>. 10.3390/en10050602 10.3390/en10050602 10.3390/en10050602 info:eu-repo/semantics/objectFile info:eu-repo/semantics/humanStartPage