气候变化领域集成服务门户(CCPortal): First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK

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DOI	10.5194/amt-17-1599-2024
	First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK
	Dowd, Emily; Manning, Alistair J.; Orth-Lashley, Bryn; Girard, Marianne; France, James; Fisher, Rebecca E.; Lowry, Dave; Lanoiselle, Mathias; Pitt, Joseph R.; Stanley, Kieran M.; O'Doherty, Simon; Young, Dickon; Thistlethwaite, Glen; Chipperfield, Martyn P.; Gloor, Emanuel; Wilson, Chris
发表日期	2024
ISSN	1867-1381
EISSN	1867-8548
起始页码	17
结束页码	5
卷号	17 期号:5
英文摘要	Atmospheric methane (CH 4 ) is the second-most-important anthropogenic greenhouse gas and has a 20-year global warming potential 82 times greater than carbon dioxide (CO 2 ). Anthropogenic sources account for similar to 60 % of global CH 4 emissions, of which 20 % come from oil and gas exploration, production and distribution. High-resolution satellite-based imaging spectrometers are becoming important tools for detecting and monitoring CH 4 point source emissions, aiding mitigation. However, validation of these satellite measurements, such as those from the commercial GHGSat satellite constellation, has so far not been documented for active leaks. Here we present the monitoring and quantification, by GHGSat's satellites, of the CH 4 emissions from an active gas leak from a downstream natural gas distribution pipeline near Cheltenham, UK, in the spring and summer of 2023 and provide the first validation of the satellite-derived emission estimates using surface-based mobile greenhouse gas surveys. We also use a Lagrangian transport model, the UK Met Office's Numerical Atmospheric-dispersion Modelling Environment (NAME), to estimate the flux from both satellite- and ground-based observation methods and assess the leak's contribution to observed concentrations at a local tall tower site (30 km away). We find GHGSat's emission estimates to be in broad agreement with those made from the in situ measurements. During the study period (March-June 2023) GHGSat's emission estimates are 236-1357 kg CH 4 h - 1 , whereas the mobile surface measurements are 634-846 kg CH 4 h - 1 . The large variability is likely down to variations in flow through the pipe and engineering works across the 11-week period. Modelled flux estimates in NAME are 181-1243 kg CH 4 h - 1 , which are lower than the satellite- and mobile-survey-derived fluxes but are within the uncertainty. After detecting the leak in March 2023, the local utility company was contacted, and the leak was fixed by mid-June 2023. Our results demonstrate that GHGSat's observations can produce flux estimates that broadly agree with surface-based mobile measurements. Validating the accuracy of the information provided by targeted, high-resolution satellite monitoring shows how it can play an important role in identifying emission sources, including unplanned fugitive releases that are inherently challenging to identify, track, and estimate their impact and duration. Rapid, widespread access to such data to inform local action to address fugitive emission sources across the oil and gas supply chain could play a significant role in reducing anthropogenic contributions to climate change.
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001190617400001
来源期刊	ATMOSPHERIC MEASUREMENT TECHNIQUES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306258
作者单位	University of Leeds; University of Leeds; Met Office - UK; Hadley Centre; University of London; Royal Holloway University London; Environmental Defense Fund; University of Bristol; University of Leeds
推荐引用方式 GB/T 7714	Dowd, Emily,Manning, Alistair J.,Orth-Lashley, Bryn,et al. First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK[J],2024,17(5).
APA	Dowd, Emily.,Manning, Alistair J..,Orth-Lashley, Bryn.,Girard, Marianne.,France, James.,...&Wilson, Chris.(2024).First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK.ATMOSPHERIC MEASUREMENT TECHNIQUES,17(5).
MLA	Dowd, Emily,et al."First validation of high-resolution satellite-derived methane emissions from an active gas leak in the UK".ATMOSPHERIC MEASUREMENT TECHNIQUES 17.5(2024).