立即基于股权的不连续公平股份排放分配的影响
Yann Robiou du Pont1,2, Mark Dekker3,4, Detlef van Vuuren3,4
1Copernicus Institute of Sustainable Development, Utrecht University, Princetonlaan 8a, Utrecht, Netherlands. yann.rdp@climate-energy-college.org.
Nature communications
|September 3, 2025
概括
目前的排放目标不符合"巴黎协定". 这项研究揭示了持续的回报不采取行动的轨迹,提出了立即影响的股权配置,需要为迅速缓解提供重大全球支持.
科学领域:
- 气候科学
- 环境政策
- 公平的排放分配
背景情况:
- 目前的国家排放目标不足以实现"巴黎协定"目标.
- 公平份额的文献通常基于当今的排放轨迹,可能会奖励过去的无所作为.
- 这些连续轨迹的代更新加剧了延迟缓解努力的回报.
研究的目的:
- 在公平份额评估中批判性地评估连续排放轨迹的方法.
- 提出和分析基于立即生效的公平原则分配排放轨迹的替代方法.
- 调查国家排放轨迹的连续性与不连续性对国际支持和国家具体贡献的影响.
主要方法:
- 开发了一种新的方法,即使用公平原则来分配国家排放轨迹.
- 在连续 (从当前的排放开始) 和不连续 (立即效应) 场景下建模的排放分配.
- 量化了这些不同分配方法对国际支持和野心差距的后果,特别是对高收入国家.
主要成果:
- 持续的排放轨迹本质上奖励过去的无所作为, 这种偏见随着代更新而增长.
- 不连续的国家轨迹,立即适用公平原则,需要大量的立即国际财政支持,以实现全球快速缓解.
- 在拟议框架下,G7国家,俄罗斯和中国对全球2030年目标差距的贡献最为显著.
- 只有少数国家将其排放目标与计算的1.5°C分配保持一致.
结论:
- 在公平份额评估中使用连续排放轨迹的常见做法是有缺陷的,因为它奖励了过去的不作为.
- 立即实施公平原则需要大量的国际合作和资金流来支持快速,公平的全球减排.
- 包括七国集团成员国,俄罗斯和中国在内的高收入国家对缩小2030年目标差距负有重大责任.
- 目前的国家排放目标与公平的1.5°C路径在很大程度上不一致,这凸显了对气候政策的迫切需要.
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