优先考虑非二氧化碳去除缓解策略可以减少与大规模依赖负面排放相关的负面影响
Jeffrey Dankwa Ampah1,2, Chao Jin1, Haifeng Liu2
1School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
Environmental science & technology
|January 29, 2024
概括
优先考虑短期的减排,而不是未来的二氧化碳去除 (CDR),至关重要. 到2050年将CDR限制在1GtCO2下,将减少化石燃料的使用和环境影响,尽管短期成本更高.
科学领域:
- 气候变化缓解策略 气候变化缓解策略
- 可持续发展的发展途径
- 能源系统分析 能源系统分析
背景情况:
- 预计二氧化碳去除 (CDR) 对于实现净零排放至关重要.
- 过度依赖未来的CDR带来了诸如延迟减排和资源竞争等风险.
研究的目的:
- 评估一种替代的缓解途径,优先考虑短期的非CDR行动.
- 评估到2050年将新型CDR部署限制在1 GtCO2的影响.
主要方法:
- 具有受约束CDR限制的场景建模 (到2050年达到1GtCO2).
- 低CDR路径与较高CDR场景 (8-22 GtCO2) 的比较.
- 对化石燃料使用,温室气体排放,空气污染物和资源压力的影响分析.
主要成果:
- 低CDR路径显著减少化石燃料消耗,温室气体排放和空气污染物.
- 低CDR下的快速能源转型减轻了对土地,水和肥料资源的压力.
- 较高的短期缓解成本与加速部署低/零碳技术有关.
结论:
- 实现非CDR战略 (可再生能源,电气化,效率) 的最大化比依赖不确定的未来CDR扩展更有效.
- 雄心勃勃的近期缓解,本十年至关重要,以防止化石燃料锁定,并确保深度脱碳.
- 一个受约束的CDR场景为实现净零排放提供了一条可行的途径,其可持续性影响最小化.
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