HFC mitigation pathways compatible with 1.5 oC in the context of the Kigali Amendment

Purohit, P. ORCID: https://orcid.org/0000-0002-7265-6960, Höglund-Isaksson, L. ORCID: https://orcid.org/0000-0001-7514-3135, & Klimont, Z. ORCID: https://orcid.org/0000-0003-2630-198X (2023). HFC mitigation pathways compatible with 1.5 oC in the context of the Kigali Amendment. In: Ninth International Symposium on Non-CO2 Greenhouse Gases, 21-23 June, 2023, Amsterdam, The Netherlands.

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Abstract

Hydrofluorocarbons (HFCs) are widely used as cooling agents in refrigeration and air conditioning, as solvents in industrial processes, and as fire-extinguishing agents, foam blowing, and aerosol propellants. They have been used in large quantities as the primary substitutes for ozone-depleting substances regulated under the Montreal Protocol. HFC refrigerant gases are the fastest-growing atmospheric greenhouse gases and amongst the most potent. The Kigali Amendment (KA) to the Montreal Protocol is an international agreement to gradually reduce the consumption and production of HFCs. It is well established that full global compliance with the current KA phasedown schedule will not mitigate future emissions at levels consistent with the Paris Agreement target to limit global warming in this century to 1.5°C, compared to pre-industrial levels. Even though full compliance with the KA phasedown schedule is projected to achieve substantial avoided warming (0.2 to 0.4°C) by the end of this century but is insufficient to achieve a 1.5°C-consistent target. Therefore, in this study, we present HFC emissions in the pre-Kigali baseline scenario analyze HFC phase-down under the Kigali Amendment (KA), Maximum Technically Feasible Reduction (MTFR), and develop alternative pathways due to the enhanced ambition of parties to the Montreal Protocol to phase-down HFCs. However, in keeping with the Montreal Protocol’s history of strengthening through regular amendments, this study indicates that fast-tracking HFC phasedown under the KA will be consistent with the Paris Agreement targets following the example of accelerated phase-out of hydrochlorofluorocarbons (HCFCs) under the Montreal Protocol.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Hydrofluorocarbons, Kigali Amendment, Montreal Protocol, Paris Agreement, Mitigation Pathways
Research Programs:	Energy, Climate, and Environment (ECE) Energy, Climate, and Environment (ECE) > Pollution Management (PM)
Depositing User:	Luke Kirwan
Date Deposited:	27 Jun 2023 12:19
Last Modified:	27 Jun 2023 12:19
URI:	https://pure.iiasa.ac.at/18868

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