气候变化领域集成服务门户(CCPortal): Factors influencing the temporal variability of atmospheric methaneemissions from Upper Silesia coal mines: a case study from the CoMet mission

CCPortal

DOI	10.5194/acp-22-16031-2022
	Factors influencing the temporal variability of atmospheric methaneemissions from Upper Silesia coal mines: a case study from the CoMet mission
	Swolkien, Justyna; Fix, Andreas; Galkowski, Michal
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	16031
结束页码	16052
卷号	22 期号:24 页码:22
英文摘要	Methane is a powerful greenhouse gas responsible for around 20 % of radiative forcing (relative to the pre-industrial era) caused by all long-lived greenhouse gases (WMO, 2021). About 60 % of the global emissions are from anthropogenic sources, and coal mining is one of the largest contributors. Emissions are either estimated by bottom-up approaches (based on inventories) or top-down approaches (based on atmospheric measurements). Combining those with an accurate error estimation allows us to better characterise model errors e.g. caused by transport mechanisms. Here we provide a detailed description of factors influencing the coal mine methane emission variability. We use high-frequency (up to hourly) temporal data from seven coal mines in the Upper Silesian Coal Basin during the Carbon dioxide and Methane (CoMet 1.0) mission from 14 May to 13 June 2018. Knowledge of these factors for the individual ventilation shaft is essential for linking the observations achieved during the CoMet 1.0 mission with models, as most publicly available data in the bottom-up worldwide inventories provide annual emissions only. The methane concentrations in examined shafts ranged from 0.10 % to 0.55%& PLUSMN;0.1 % during the study period. Due to the changing scope of mining works performed underground, they were subjected to a significant variation on a day-to-day basis. The yearly methane average emission rate calculated based on 1 month's set of temporal data of the analysed subset of mines was of the order of 142.68 kt yr(-1) (sigma=18.63 kt yr(-1)), an estimate 27 % lower than the officially published State Mining Authority (WUG) data and 36 % lower than reported to the European Pollutant Release and Transfer Register (E-PRTR). We also found that emissions from individual coal mine facilities were over- and underestimated by between 4 % to 60 %, compared to the E-PRTR, when short-term records were analysed. We show that the observed discrepancies between annual emissions based on temporal data and public inventories result from (1) the incorrect assumption that the methane emissions are time-invariant, (2) the methodology of measurements, and lastly, (3) the frequency and timing of measurements. From the emission monitoring perspective, we recommend using a standardised emission measurement system for all coal mines, similar to the Methane Fire Teletransmission Monitoring System (SMP-NT/A). Legal safety requirements require all coal mines to implement this system. After an adaptation, the system could allow for gas flow quantification, necessary for accurate and precise estimations of methane emissions at a high temporal resolution. Using this system will also reduce the emission uncertainty due to factors like frequency and timing of measurements. In addition, it would be beneficial to separately identify the emissions from individual ventilation shafts and methane drainage stations. That would bridge the gap between bottom-up and top-down approaches for coal mine emissions. The intermittent releases of unutilised methane from the drainage stations are currently not considered when constructing regional methane budgets.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000901797300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273285
作者单位	AGH University of Science & Technology; Max Planck Society; AGH University of Science & Technology
推荐引用方式 GB/T 7714	Swolkien, Justyna,Fix, Andreas,Galkowski, Michal. Factors influencing the temporal variability of atmospheric methaneemissions from Upper Silesia coal mines: a case study from the CoMet mission[J],2022,22(24):22.
APA	Swolkien, Justyna,Fix, Andreas,&Galkowski, Michal.(2022).Factors influencing the temporal variability of atmospheric methaneemissions from Upper Silesia coal mines: a case study from the CoMet mission.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(24),22.
MLA	Swolkien, Justyna,et al."Factors influencing the temporal variability of atmospheric methaneemissions from Upper Silesia coal mines: a case study from the CoMet mission".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.24(2022):22.