中国的碳预算:1980-2021年
Xiaosheng Xia1, Peiyang Ren1, Xuhui Wang2
1School of Atmospheric Sciences, Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon Cycle, Sun Yat-sen University, Zhuhai 510245, China.
Science bulletin
|November 21, 2023
概括
中国中国中国中国.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 大气化学 大气化学
背景情况:
- 作为一个主要的温室气体排放国,中国的目标是实现碳峰值和碳中和.
- 精确量化二氧化碳 (CO2) 来源和吸收器对于监测进展至关重要.
- 为了验证,这些估计与中国国家温室气体库存 (NGHGI) 进行了比较.
研究的目的:
- 从1980年到2021年,全面估计中国人为二氧化碳排放量和天然二氧化碳来源/沉积点.
- 评估土地碳汇中的生态项目的有效性.
- 将排放估计与NGHGI进行比较,并确定差异.
主要方法:
- 利用最先进的数据集和模型进行二氧化碳排放和沉降估计.
- 分析了涵盖能源,工业过程,产品使用,废物和自然水槽的数据.
- 结果与官方NGHGIs进行了比较,用于选定的年份 (1994, 2005, 2010, 2012, 2014).
主要成果:
- 中国的人为二氧化碳排放量在2021年增长了7.39倍,达到12.77亿二氧化碳.
- 中国的陆地碳汇量显著增加,平均为1.65 Gt CO2 yr-1 (2010-2021),抵消了14.69%的排放.
- 西和青海实现了碳中和;近一半的地区有消化槽,抵消了<10%的排放.
结论:
- 在NGHGI和化石CO2排放估计之间观察到很高的一致性.
- 在这项研究和NGHGI之间,在土地碳汇估计中发现了显著的差异.
- 迫切需要使用基于过程的模型来验证NGHGI陆地碳汇估计.
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