评估来自中国,印度和美国的MSW垃圾填埋场的甲排放,并使用双层方法从太空到美国进行评估
Shuai Zhang1, Menglin Lei1, Xuyang Huang1
1MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, PR China.
Journal of environmental management
|February 27, 2025
概括
垃圾填埋场的甲排放是一个主要的气候问题. 这项研究使用卫星数据来显示中国.
科学领域:
- 环境科学 环境科学
- 大气科学 大气科学
- 遥感 遥感 遥感 遥感
背景情况:
- 废物行业是人为甲 (CH4) 的重要来源,占全球排放量的13%.
- 城市固体废物 (MSW) 垃圾填埋场是废物部门的主要甲排放者,需要有效的缓解策略.
- 现有的研究通常依赖于自下而上的库存,有限的研究量化了来自太空的垃圾填埋场CH4排放量.
研究的目的:
- 通过使用基于太空的观测框架,评估垃圾填埋场运营实践对甲排放的影响.
- 为了比较来自中国,印度和美国的MSW垃圾填埋场的CH4排放率.
- 评估当前甲减排政策的有效性,并确定需要改进的领域.
主要方法:
- 对中国,印度和美国90个MSW垃圾填埋场实施了双层观察框架.
- 热带气球监测仪 (TROPOMI) 的数据经过风旋转分析,以对垃圾填埋场排放源进行定性评估.
- 超光谱成像仪的观测被用来量化来自选定的垃圾填埋场的甲排放流.
主要成果:
- 发现,与印度和美国相比,中国的垃圾填埋场运营实践在减少甲排放方面更有效.
- 印度MSW垃圾填埋场的甲排放率平均高于IPCC默认方法估计的1.3倍.
- 在这三个国家中,卫星衍生的排放率与IPCC估计之间的相关性很弱 (r = -0.39对中国,0.21对印度, -0.17对美国).
结论:
- 基于卫星的量化显示了垃圾填埋场甲排放的显著变化,受运营实践的影响.
- 中国的垃圾填埋管理在减轻甲排放方面似乎比印度和美国更有效.
- 这些差异突显出需要同时进行卫星和现场测量,以改进排放估计和改善气候减缓战略.
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