气候变化领域集成服务门户(CCPortal): Quantification of methane emissions from hotspots and during CUVID-19 using a global atmospneric inversion

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DOI	10.5194/acp-22-5961-2022
	Quantification of methane emissions from hotspots and during CUVID-19 using a global atmospneric inversion
	McNorton, Joe; Bousserez, Nicolas; Agusti-Panareda, Anna; Balsamo, Gianpaolo; Cantarello, Luca; Engelen, Richard; Huijnen, Vincent; Inness, Antje; Kipling, Zak; Parrington, Mark; Ribas, Roberto
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	5961
结束页码	5981
卷号	22 期号:9 页码:21
英文摘要	Concentrations of atmospheric methane (CH4), the second most important greenhouse gas, continue to grow. In recent years this growth rate has increased further (2020: +15.6 ppb), the cause of which remains largely unknown. Here, we demonstrate a high-resolution (similar to 80 km), short-window (24 h) 4D-Var global inversion system based on the ECMWF Integrated Forecasting System (IFS) and newly available satellite observations. The largest national disagreement found between prior (5.3 Tg per month) and posterior (5.0 Tg per month) CH4 emissions is from China, mainly attributed to the energy sector. Emissions estimated from our global system are in good agreement with those of previous regional studies and point source-specific studies Emission events (leaks or blowouts) > 10 t CH(4)h(-1) were detected, but without appropriate prior uncertainty information, were not well quantified. Our results suggest that global anthropogenic CH4 emissions for the first 6 months of 2020 were, on average, 470 Gg per month (+1.6 %) higher than for 2019, mainly attributed to the energy and agricultural sectors. Regionally, the largest increases were seen from China (+220 Gg per month, 4.3 %), with smaller increases from India (+50 Gg per month, 1.5 %) and the USA (+40 Gg per month, 2.2 %). When assuming a consistent year-on-year positive trend in emissions, results show that during the onset of the global slowdown (March-April 2020) energy sector CH4 emissions from China increased above expected levels; however, during later months (May-June 2020) emissions decreased below expected levels. Results for the first 6 months of 2019/20 suggest that the accumulated impact of the COVID-19 slowdown on CH4 emissions from March-June 2020 might be small relative to the long-term positive trend in emissions. Changes in OH concentration, not investigated here, may have contributed to the observed growth in 2020.
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:000791258800001
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/273584
作者单位	European Centre for Medium-Range Weather Forecasts (ECMWF); Royal Netherlands Meteorological Institute
推荐引用方式 GB/T 7714	McNorton, Joe,Bousserez, Nicolas,Agusti-Panareda, Anna,et al. Quantification of methane emissions from hotspots and during CUVID-19 using a global atmospneric inversion[J],2022,22(9):21.
APA	McNorton, Joe.,Bousserez, Nicolas.,Agusti-Panareda, Anna.,Balsamo, Gianpaolo.,Cantarello, Luca.,...&Ribas, Roberto.(2022).Quantification of methane emissions from hotspots and during CUVID-19 using a global atmospneric inversion.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(9),21.
MLA	McNorton, Joe,et al."Quantification of methane emissions from hotspots and during CUVID-19 using a global atmospneric inversion".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.9(2022):21.