使用TROPOMI对陆上石油和天然气甲来源的全球观测覆盖
Mozhou Gao1, Zhenyu Xing2, Coleman Vollrath2
1Centre for Smart Emissions Sensing Technologies, Department of Geography, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada. mozhou.gao@ucalgary.ca.
Scientific reports
|October 5, 2023
概括
卫星观测提供了对石油和天然气行业甲排放的洞察力. 然而,像TROPOMI这样的当前被动传感器的全球覆盖范围有限,特别是在热带和高度地区,这阻碍了常规的甲监测.
科学领域:
- 地球观测 地球观测
- 大气科学 大气科学
- 环境监测 环境监测
背景情况:
- 卫星观测对于测量石油和天然气 (O&G) 行业的甲 (CH4) 排放,识别大型排放事件和估计盆地级排放至关重要.
- 被动遥感卫星虽然有价值,但对环境条件敏感,影响全球常规CH4监测的可靠性.
- 在Sentinel-5P上的TROPOMI仪器每天提供全球覆盖,使其成为评估卫星监控能力的关键系统.
研究的目的:
- 调查TROPOMI卫星对石油和天然气 (O&G) 部门常规甲 (CH4) 排放监测的全球观测覆盖范围.
- 评估当前被动探测卫星的潜力和局限性,以检测和量化CH4排放,特别是来自陆上O&G基础设施.
- 根据TROPOMI观测覆盖范围和全球O&G库存数据,评估国家一级的排放量定量的可靠性.
主要方法:
- 在0.1° × 0.1°分辨率下使用质量保证值 (≥0.5) 生成TROPOMI有效观测日 (2019-2021) 的全球地图.
- 分析了影响观测覆盖范围的因素,包括云层覆盖,太阳顶峰角度和气溶光学厚度.
- 提取了160个国家的陆上O&G基础设施的TROPOMI年度平均观测覆盖范围 (TOC),并将其与库存不确定性相结合.
主要成果:
- 在干旱地区,TROPOMI的观测覆盖率很有希望 (高达58.6%),但在热带和高度地区的覆盖率有限 (降至0%).
- 在前10个石油和天然气生产国中,有7个国家平均每年TOC低于10%,这表明常规大排放事件检测能力有限.
- 使用TROPOMI数据量化CH4排放的精度预计在干旱地区/中度地区更高,在热带地区/高度地区更低.
结论:
- 目前的被动探测卫星在热带和高度国家的石油和天然气行业频繁监测甲排放的潜力很低.
- 加拿大,俄罗斯,巴西,挪威和委内瑞拉等地区面临着由于卫星观测覆盖范围有限的常规监测挑战.
- 建议在没有足够的被动卫星观测覆盖范围的地区进行常规甲排放监测的替代方法.
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