评估卫星检测的甲超级发射器在量化阿尔及利亚石油和天然气生产区总排放的相对重要性
S Naus1, J D Maasakkers1, R Gautam2
1SRON Netherlands Institute for Space Research, Leiden 3584 CA, Netherlands.
Environmental science & technology
|November 13, 2023
概括
来自阿尔及利亚石油和天然气田的甲排放被利用卫星数据分析. 调查结果显示,国家报告中存在严重的低估,强调需要改善对超级发射者和扩散源的监测.
科学领域:
- 地球科学 地球科学 地球科学
- 大气科学 大气科学
- 环境科学 环境科学
背景情况:
- 石油和天然气运营的甲排放是全球变暖的主要驱动因素.
- 准确量化这些排放对于有效的气候变化减缓战略至关重要.
研究的目的:
- 调查和量化2020年阿尔及利亚哈西·梅尔天然气田和哈西·梅萨乌德石油生产区的甲排放量.
- 将来自卫星的排放估计与国家库存数据进行比较,并确定差异.
主要方法:
- 利用高分辨率的Sentinel-2 (20米) 数据来检测和估计11个超级发射器的时间序列.
- 采用运输模型反转,整合了Sentinel-2和高精度TROPOMI (7公里×5.5公里) 的甲数据.
- 来自已确定的超级排放者和扩散区域源的估计排放量.
主要成果:
- 与2019年的库存数据相比,2020年的甲排放量在Hassi R'Mel下降了53%,在Hassi Messaoud上升了79%.
- 石油生产约占阿尔及利亚甲排放量的75%,与全国报告的5%形成鲜明对比.
- 分散来源主导了排放,但超级排放者做出了重大贡献 (24-49%),强调了有针对性的减缓的必要性.
结论:
- 通过协同使用Sentinel-2和TROPOMI,可以详细描述石油和天然气甲排放的情况.
- 缓解策略必须针对分散排放和高影响超级排放者,以有效减少.
- 阿尔及利亚的国家甲排放报告需要根据卫星来源的证据进行重新评估.
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