Understanding equityeefficiency interaction in the distribution of global carbon budgets  

作　　者：Xun-Zhang PAN Fei TENG Yann ROBIOU DU PONT Hai-Lin WANG 

机构地区：[1]School of Economics and Management,China University of Petroleum,Beijing 102249,China [2]Institute of Energy,Environment and Economy,Tsinghua University,Beijing 100084,China [3]Institute for Sustainable Development and International Relations,Sciences Po,Paris 75007,France [4]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China

出　　处：《Advances in Climate Change Research》2023年第1期13-22,共10页气候变化研究进展（英文版）

基　　金：supported by the National Key R&D Program of China(2017YFA0605302);the National Natural Science Foundation of China(72174105).

摘　　要：Equity and efficiency are two important factors guiding the mitigation of anthropogenic emissions to achieve the Paris climate goals.Previous studies have proposed a range of allocations of global carbon budgets,but few have quantified the equity-efficiency interaction.Based on an investigation of the existing allocation literature,this study conducts a novel analysis using a‘mixed’allocation‘big-data’framework to understand the equityeefficiency interaction in the distribution of global carbon budgets under 2℃ and 1.5℃ warming targets.At a global scale,a carbon Gini coefficient and aggregate abatement costs are used as quantitative metrics to reflect equity and efficiency,respectively.Results show an equity-efficiency frontier that reflects the opportunity for the international community to co-improve equity and efficiency on top of existing allocations.However,the frontier also features strong trade-offs to further improve equity and efficiency if national allocations are to be achieved individually.Our analysis verifies that such trade-offs are sensitively dependent on the level of global connection and integration.Linking national mitigation actions and potentials can help promote equity-efficiency synergies and contribute to the efficient achievement of the Paris Agreement's temperature and equity goals.

关 键 词：Equity-efficiency interaction Global carbon budgets Paris climate goals Cooperation and finance Frontier analysis 

分 类 号：P467[天文地球—大气科学及气象学]