Measured Canadian oil sands CO2 emissions are higher than estimates made using internationally recommended methods
Measured Canadian oil sands CO2 emissions are higher than estimates made using internationally recommended methods
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DOI：
10.1038/s41467-019-09714-9
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发表时间：
2019-04-23
影响因子：
16.6
通讯作者：
Vogel, Felix
中科院分区：
文献类型：
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作者：
Liggio, John;Li, Shao-Meng;Vogel, Felix
石油和天然气(O&G)部门是全球温室气体(GHG)排放的一大来源。然而，对O&G排放量的估计依赖于自下而上的方法，很少通过大气测量来评估。在这里，我们使用飞机在加拿大油砂(OS)上空的测量来得出第一个自上而下的、基于测量的确定其年二氧化碳排放量和强度的方法。结果表明，OS设施的二氧化碳排放强度比使用公开数据估计的高13-123%。这导致露天采矿作业的年温室气体排放量比行业报告的高出30%，总体OS温室气体排放量(17Mt)比行业报告的高出30%，尽管排放报告使用了最新的和推荐的自下而上的方法。考虑到整个运营和天然气部门自下而上的报告方法的相似性，这些结果表明运营和天然气二氧化碳排放清单数据可能比之前考虑的更不确定。
The oil and gas (O&G) sector represents a large source of greenhouse gas (GHG) emissions globally. However, estimates of O&G emissions rely upon bottom-up approaches, and are rarely evaluated through atmospheric measurements. Here, we use aircraft measurements over the Canadian oil sands (OS) to derive the first top-down, measurement-based determination of the their annual CO2 emissions and intensities. The results indicate that CO2 emission intensities for OS facilities are 13-123% larger than those estimated using publically available data. This leads to 64% higher annual GHG emissions from surface mining operations, and 30% higher overall OS GHG emissions (17 Mt) compared to that reported by industry, despite emissions reporting which uses the most up to date and recommended bottom-up approaches. Given the similarity in bottom-up reporting methods across the entire O&G sector, these results suggest that O&G CO2 emissions inventory data may be more uncertain than previously considered.