气候变化领域集成服务门户(CCPortal): Methane (CH4) sources in Krakow, Poland: Insights from isotope analysis

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DOI	10.5194/acp-21-13167-2021
	Methane (CH4) sources in Krakow, Poland: Insights from isotope analysis
	Menoud M.; Van Der Veen C.; Necki J.; Bartyzel J.; Szénási B.; Stanisavljević M.; Pison I.; Bousquet P.; Röckmann T.
发表日期	2021
ISSN	1680-7316
起始页码	13167
结束页码	13185
卷号	21 期号:17
英文摘要	Methane (CH4) emissions from human activities are a threat to the resilience of our current climate system. The stable isotopic composition of methane (I13C and I2H) allows us to distinguish between the different CH4 origins. A significant part of the European CH4 emissions, 3.6ĝ€¯% in 2018, comes from coal extraction in Poland, the Upper Silesian Coal Basin (USCB) being the main hotspot. Measurements of CH4 mole fraction (χ(CH4)), I13C, and I2H in CH4 in ambient air were performed continuously during 6 months in 2018 and 2019 at Krakow, Poland, in the east of the USCB. In addition, air samples were collected during parallel mobile campaigns, from multiple CH4 sources in the footprint area of the continuous measurements. The resulting isotopic signatures from sampled plumes allowed us to distinguish between natural gas leaks, coal mine fugitive emissions, landfill and sewage, and ruminants. The use of I2H in CH4 is crucial to distinguish the fossil fuel emissions in the case of Krakow because their relatively depleted I13C values overlap with the ones of microbial sources. The observed χ(CH4) time series showed regular daily night-Time accumulations, sometimes combined with irregular pollution events during the day. The isotopic signatures of each peak were obtained using the Keeling plot method and generally fall in the range of thermogenic CH4 formation-with I13C between-59.3g and-37.4g Vienna Pee Dee Belemnite (V-PDB) and I2H between-291g and-137g Vienna Standard Mean Ocean Water (V-SMOW). They compare well with the signatures measured for gas leaks in Krakow and USCB mines. The CHIMERE transport model was used to compute the CH4 and isotopic composition time series in Krakow, based on two emission inventories. The magnitude of the pollution events is generally underestimated in the model, which suggests that emission rates in the inventories are too low. The simulated isotopic source signatures, obtained with Keeling plots on each simulated peak, indicate that a higher contribution from fuel combustion sources in the EDGAR v5.0 inventory would lead to a better agreement than when using CAMS-REG-GHG v4.2 (Copernicus Atmosphere Monitoring Service REGional inventory for Air Pollutants and GreenHouse Gases). The isotopic mismatches between model and observations are mainly caused by uncertainties in the assigned isotopic signatures for each source category and the way they are classified in the inventory. These uncertainties are larger for emissions close to the study site, which are more heterogenous than the ones advected from the USCB coal mines. Our isotope approach proves to be very sensitive in this region, thus helping to evaluate emission estimates. © 2021 The Author(s).
语种	英语
scopus关键词	coal mine; emission inventory; isotopic analysis; isotopic composition; measurement method; methane; point source; pollution incidence; pollution monitoring; uncertainty analysis; Cracow; Malopolskie; Poland [Central Europe]; Belemnoidea; Ruminantia
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/246606
作者单位	Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Utrecht, Netherlands; Faculty of Physics and Applied Computer Science, Agh University of Science and Technology, Krakow, Poland; Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Université Paris-Saclay, Cea, CNRS, Uvsq, Gif-sur-Yvette, France
推荐引用方式 GB/T 7714	Menoud M.,Van Der Veen C.,Necki J.,et al. Methane (CH4) sources in Krakow, Poland: Insights from isotope analysis[J],2021,21(17).
APA	Menoud M..,Van Der Veen C..,Necki J..,Bartyzel J..,Szénási B..,...&Röckmann T..(2021).Methane (CH4) sources in Krakow, Poland: Insights from isotope analysis.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17).
MLA	Menoud M.,et al."Methane (CH4) sources in Krakow, Poland: Insights from isotope analysis".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021).