中国的化石燃料CO2排放量估计使用对共发射NO2的表面观测
Shuzhuang Feng1, Fei Jiang1,2,3, Hengmao Wang1,2
1Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing 210023, China.
Environmental science & technology
|May 1, 2024
概括
准确的化石燃料二氧化碳 (FFCO2) 排放估计至关重要. 这项研究使用NO2观测来细化中国的FFCO2排放,揭示了库存的不准确性和季节性模式.
科学领域:
- 大气化学和物理大气化学和物理
- 气候科学 气候科学
- 环境监测 环境监测
背景情况:
- 准确的化石燃料二氧化碳 (FFCO2) 排放对于气候预测和减缓至关重要,但使用传统的经济统计和排放因子来量化却具有挑战性.
- 现有的"自下而上"的中国排放库存经常包含活动数据和空间分布的重大不准确性.
- 了解FFCO2排放的时空动态对于有效的气候政策至关重要.
研究的目的:
- 开发一种更准确的方法来估计中国的每日FFCO2排放量.
- 为了识别和纠正当前FFCO2排放库存中的不准确性.
- 为了更好地了解FFCO2排放季节性变化.
主要方法:
- 采用区域数据同化框架来整合现场的NO2观测.
- 结合了受观察限制的NO2排放与电网特定的CO2-NO2排放比率.
- 2016年中国的每日FFCO2排放量推断.
主要成果:
- 估计2016年国家FFCO2排放量为11.4 PgCO2·yr-1,1σ的不确定性为1.5 PgCO2·yr-1.
- 确定了中国西部能源部门的FFCO2排放低估和发达城市地区的高估.
- 揭示了FFCO2排放的更明显的季节性,冬季显著增加.
结论:
- 与传统库存相比,数据同化方法提供了更准确的FFCO2排放评估.
- 在中国的FFCO2估计和实际排放之间存在显著的区域差异.
- 更好地了解FFCO2排放的时空模式对于减缓气候变化的努力至关重要.
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