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持续的二氧化碳监测验证了2018-2021年期间中国的二氧化碳排放和沉降

Junting Zhong¹, Xiaoye Zhang¹, Lifeng Guo¹

¹Monitoring and Assessment Center for Greenhouse Gases and Carbon Neutrality, Key Laboratory of Atmospheric Chemistry of China Meteorological Administration, Chinese Academy of Meteorological Sciences, Beijing 100081, China; Laboratory of Climate Change Mitigation and Carbon Neutrality, Henan University, Zhengzhou 450001, China.

Science bulletin

|August 31, 2023

概括

中国中国中国中国.

科学领域:

大气化学和环境科学.
气候变化和碳循环研究.
地质科学和地球系统科学.

背景情况:

准确估计二氧化碳 (CO2) 排放量和排放量对中国的碳中和目标至关重要.
现有的自下而上的库存在区域范围内存在不确定性,缺乏独立的大气验证.
上下大气测量提供了一种独立的方法来评估二氧化碳预算.

研究的目的:

通过使用大气数据,独立核实和完善中国的区域二氧化碳排放和沉降库存.
提供从2018年至2021年中国各地二氧化碳流量变化的自上而下的评估.
为了确定碳中和目标的区域二氧化碳监测中的挑战和不确定性.

主要方法:

整合了来自中国39个高精度二氧化碳监测站的数据.
应用上下大气逆转技术以以45公里×45公里分辨率估计二氧化碳流量.
将来自大气的估计与现有的自下而上的库存进行比较.

主要成果:

中国的二氧化碳排放量 (3.40 Pg C a−1) 比2018-2021年五大自下而上的库存高出15%.
2020年年度排放增长放缓 (1.1%),然后在2021年恢复 (4.0%),与大气二氧化碳增长率保持一致.
中国的陆地二氧化碳吸收 (0.57 Pg C a-1) 是相当大的,占人为排放的约16.9%,具有显著的跨年变化.
由于监测稀疏,中国西部的二氧化碳流量估计仍然存在很大的不确定性.

结论:

从上而下的估计显示,中国二氧化碳排放和沉降的空间时间差异显著.
目前的排放水平和沉降动态为实现2060年碳中和目标带来了挑战.
增强的二氧化碳监测网络,特别是在数据稀疏的地区,对于准确的验证和政策制定至关重要.

关键词:

二氧化碳 (CO) 排放验证 CO (((2) 监控监控的情况.中国的土地正在沉没.顶向下的反转方式.

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