Achieving net-zero CO_(2)emissions is the current main focus of China’s carbon neutrality goal.However,non-CO_(2)greenhouse gases(GHGs)are more powerful climate forcers,making their emission reduction an opportunity ...Achieving net-zero CO_(2)emissions is the current main focus of China’s carbon neutrality goal.However,non-CO_(2)greenhouse gases(GHGs)are more powerful climate forcers,making their emission reduction an opportunity to rapidly mitigate future warming.Here,we evaluate non-CO_(2)mitigation potentials,costs and climate benefits in the context of China’s carbon neutrality goals.The assessment is conducted by coupling the integrated assessment model GCAM with a climate emulator.The findings indicate that mitigation technologies can largely reduce fluorinated gas emissions from industrial sectors,but long-term non-CO_(2)reductions of energy sector activities rely heavily on fuel switching.Furthermore,the cumulative costs of deploying non-CO_(2)mitigation technologies are projected to be less than 10%of the total costs of achieving carbon neutrality from 2020 to 2060.If non-CO_(2)mitigation measures are included in the overall mitigation portfolio,the benefits of avoided warming would by far outweigh the total mitigation cost increase.Our results thus highlight that incorporating a wider suite of GHGs into climate change mitigation strategies can enhance the cost-effectiveness of mitigation efforts.展开更多
基金supported by the National Key Research and Development Program of China(2022YFC3105304)the National Natural Science Foundation of China(72303136)+1 种基金the Shandong Natural Science Foundation of China(ZR2023QG002)Major grant in National Social Sciences of China(23VRC037,24VHQ018).
文摘Achieving net-zero CO_(2)emissions is the current main focus of China’s carbon neutrality goal.However,non-CO_(2)greenhouse gases(GHGs)are more powerful climate forcers,making their emission reduction an opportunity to rapidly mitigate future warming.Here,we evaluate non-CO_(2)mitigation potentials,costs and climate benefits in the context of China’s carbon neutrality goals.The assessment is conducted by coupling the integrated assessment model GCAM with a climate emulator.The findings indicate that mitigation technologies can largely reduce fluorinated gas emissions from industrial sectors,but long-term non-CO_(2)reductions of energy sector activities rely heavily on fuel switching.Furthermore,the cumulative costs of deploying non-CO_(2)mitigation technologies are projected to be less than 10%of the total costs of achieving carbon neutrality from 2020 to 2060.If non-CO_(2)mitigation measures are included in the overall mitigation portfolio,the benefits of avoided warming would by far outweigh the total mitigation cost increase.Our results thus highlight that incorporating a wider suite of GHGs into climate change mitigation strategies can enhance the cost-effectiveness of mitigation efforts.
