西北农林大学岳超教授和电子科技大学何彬彬教授合作，报道了由木本区域扩张和保护驱动下的中国生物质能碳储量的增长。相关论文于2024年10月30日发表于国际顶尖学术期刊《自然—地球科学》杂志上。
据介绍，《巴黎协定》要求签署国提高本国温室气体清单的透明度。中国的清单报告了使用地面森林地块测量获得的大量森林碳收益，但以往的研究缺乏对此类清单的独立卫星支持，且对人类管理和人为环境变化（大气二氧化碳增长、气候变化和氮沉积）的影响知之甚少。
研究团队利用遥感和植被建模，以探明2001-2020年中国木本生物量碳的变化及其驱动因素。结果表明，在此期间，森林覆盖率增加了6.2% (59.2Mha)，木本生物量碳汇为208.6±51.8TgC/yr-1，与国家清单一致。森林和林地的保护对观测到的碳汇做出了出乎意料的巨大贡献（59.2%），另外29.4%来自人为扩张。
在这些管理驱动的汇中，53.7% （99.2TgC/yr-1）被归因于直接管理效应，其余46.3%被归因于环境变化的影响。中国生态修复工程对直接管理效果的贡献率为73.5%。研究结果提供了基于卫星的证据来支持中国的碳清单，并强调了人类管理在中国木本碳平衡中的关键作用。
附：英文原文
Title: Growing biomass carbon stock in China driven by expansion and conservation of woody areas
Author: Liao, Zhanmang, Yue, Chao, He, Binbin, Zhao, Kaiguang, Ciais, Philippe, Alkama, Ramdane, Grassi, Giacomo, Sitch, Stephen, Chen, Rui, Quan, Xingwen, Xu, Mengyang, Wang, Mengyu
Issue&Volume: 2024-10-30
Abstract: The Paris Agreement mandates that signatory countries enhance the transparency of their national greenhouse gas inventories. China’s inventories have reported substantial forest carbon gains using ground-based forest plot measurements, but independent satellite-based support for such inventories is lacking and the contributions from human management and anthropogenic environmental changes (atmospheric CO2 growth, climate change and nitrogen deposition) are unknown. Here we use remote sensing and vegetation modelling to investigate the changes in woody biomass carbon and their drivers across China from 2001 to 2020. Our results show a forest cover increase of 6.2% (59.2Mha) over this period and a woody biomass carbon sink of 208.6±51.8Tg C yr-1, consistent with the national inventories. The conservation of forest and woodland areas made an unexpectedly large contribution (59.2%) to the observed sink, with an additional 29.4% from anthropogenic expansion. Of these management-driven sinks, 53.7% (99.2Tg C yr-1) is attributed to a direct management effect and the remaining 46.3% to the effects of environmental changes. China’s ecological restoration projects contributed 73.5% of the direct management effect. Our study provides satellite-based evidence to support China’s inventories and underscores the crucial role of human management in the nation’s woody carbon balance.
DOI: 10.1038/s41561-024-01569-0
Source: https://www.nature.com/articles/s41561-024-01569-0