改造美国农业以改善气候变化的碳排放
David J Beerling1, Euripides P Kantzas2, Mark R Lomas2
1Leverhulme Centre for Climate Change Mitigation, School of Biosciences, University of Sheffield, Sheffield, UK. d.j.beerling@sheffield.ac.uk.
Nature
|February 5, 2025
概括
增强气候处理 (EW) 使用农场的碎石从大气中去除二氧化碳 (CO2). 这种方法可以大大帮助美国在2050年实现净零排放.
科学领域:
- 地球和环境科学
- 气候科学
- 农业科学
背景情况:
- 增强气候处理 (EW) 是一种利用农田上的岩气候处理去除二氧化碳 (CDR) 的策略.
- 在农田上广泛采用电子电气可能是实现到2050年净零排放目标的关键组成部分.
- 之前的评估已经强调了电力发电的潜力,但考虑到资源限制,缺乏详细的具体分析.
研究的目的:
- 量化美国在特定州的碳封存.
- 评估EW作为CDR战略的长期可行性和成本效益.
- 评估EW的附带效益,例如对空气质量的影响.
主要方法:
- 详细的碳循环分析,包括资源可用性和美国特定州的农田数据.
- 在河流和海洋系统中进行溶解产品运输的地化学评估.
- 在考虑后勤和地质因素的情况下,对整个美国的电子电气部署进行空间映射成本分析.
主要成果:
- 在美国,到2050年可封存0.16至0.30亿二氧化碳,到2070年可封存0.25至0.49亿二氧化碳.
- 来自EW的溶解产品显示有效的运输,表明代际CDR潜力.
- 预计到2050年,CDR成本将降至大约100-150tCO2-1,初始成本将更高.
- 表明可能会暂时降低地面臭氧和二次气溶.
结论:
- 增强气候对美国来说是一个可行的,被忽视的创新,
- 虽然不是减少排放的替代品,但在成本下降的情况下,EW提供了显著的CDR潜力.
- 需要进一步研究公众意识,公平,以及动员大规模的EW行业.
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