美国康奈尔大学Yiqi Luo团队研究了管理森林中木屑保存的巨大二氧化碳去除潜力。该研究于2025年6月25日发表在《自然—地球科学》杂志上。
将气候变暖限制在1.5 °C要求减少温室气体排放和二氧化碳去除。虽然人们已经探索了各种二氧化碳去除策略来实现全球温室气体净零排放并考虑遗留排放，但有必要进行额外的探索，以研究更持久、可扩展和可持续的方法来实现气候目标。研究组表明，基于使用三个地球系统模型的碳循环分析，在管理森林中保护木质废弃物可以可持续地从大气中去除数十亿吨二氧化碳。木质碎片是由伐木、锯木厂废物和废弃的木质产品产生的，可以保存在深层土壤中，将其停留时间（耐久性的衡量标准）延长数千年。
从2025年到2100年，如果其停留时间延长100-2000年，并且在去除5%的二氧化碳后，考虑到机器操作用于木材碎片保护的二氧化碳排放量，那么在管理森林中保存每年的木质碎片产量有能力从大气中累计去除769-937 GtCO2（平均每年10.1-12.4 GtCO2）。这意味着全球气温将降低0.35-0.42 °C。鉴于其巨大的潜力、相对较低的成本和长期的耐用性，未来的努力应侧重于在各种情况下为这项技术建立大规模的示范项目，并严格监测二氧化碳的去除及其副作用。
附：英文原文
Title: Large CO2 removal potential of woody debris preservation in managed forests
Author: Luo, Yiqi, Wei, Ning, Lu, Xingjie, Zhou, Yu, Tao, Feng, Quan, Quan, Liao, Cuijuan, Jiang, Lifen, Xia, Jianyang, Huang, Yuanyuan, Niu, Shuli, Xu, Xiangtao, Sun, Ying, Zeng, Ning, Koven, Charles, Peng, Liqing, Davis, Steve, Smith, Pete, You, Fengqi, Jiang, Yu, Cheng, Lailiang, Houlton, Benjamin
Issue&Volume: 2025-06-25
Abstract: Limiting climate warming to 1.5°C requires reductions in greenhouse gas emissions and CO2 removal. While various CO2 removal strategies have been explored to achieve global net-zero greenhouse gas emissions and account for legacy emissions, additional exploration is warranted to examine more durable, scalable and sustainable approaches to achieve climate targets. Here we show that preserving woody debris in managed forests can remove gigatonnes of CO2 from the atmosphere sustainably based on a carbon cycle analysis using three Earth system models. Woody debris is produced from logging, sawmill wastes and abandoned woody products, and can be preserved in deep soil to lengthen its residence time (a measure of durability) by thousands of years. Preserving annual woody debris production in managed forests has the capacity to remove 769–937 GtCO2 from the atmosphere cumulatively (10.1–12.4 GtCO2 yr1 on average) from 2025 to 2100, if its residence time is lengthened for 100–2,000 years and after 5% CO2 removal is discounted to account for CO2 emission due to machine operation for wood debris preservation. This translates to a reduction in global temperatures of 0.35–0.42°C. Given the large potential, relatively low cost and long durability, future efforts should be focused on establishing large-scale demonstration projects for this technology in a variety of contexts, with rigorous monitoring of CO2 removal, its co-benefits and side-effects.
DOI: 10.1038/s41561-025-01731-2
Source: https://www.nature.com/articles/s41561-025-01731-2