气候变化领域集成服务门户(CCPortal): Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements

CCPortal

DOI	10.5194/acp-23-2293-2023
	Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements
	Narbaud, Clement; Paris, Jean-Daniel; Wittig, Sophie; Berchet, Antoine; Saunois, Marielle; Nedelec, Philippe; Belan, Boris D.; Arshinov, Mikhail Y.; Belan, Sergei B.; Davydov, Denis; Fofonov, Alexander; Kozlov, Artem
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	2293
结束页码	2314
卷号	23 期号:3 页码:22
英文摘要	A more accurate characterization of the sources and sinks of methane (CH4) and carbon dioxide (CO2) in the vulnerable Arctic environment is required to better predict climate change. A large-scale aircraft campaign took place in September 2020 focusing on the Siberian Arctic coast. CH4 and CO2 were measured in situ during the campaign and form the core of this study. Measured ozone (O-3) and carbon monoxide (CO) are used here as tracers. Median CH4 mixing ratios are fairly higher than the monthly mean hemispheric reference (Mauna Loa, Hawaii, US) with 1890-1969 ppb vs. 1887 ppb respectively, while CO2 mixing ratios from all flights are lower (408.09-411.50 ppm vs. 411.52 ppm). We also report on three case studies. Our analysis suggests that during the campaign the European part of Russia's Arctic and western Siberia were subject to long-range transport of polluted air masses, while the east was mainly under the influence of local emissions of greenhouse gases. The relative contributions of the main anthropogenic and natural sources of CH(4 )are simulated using the Lagrangian model FLEXPART in order to identify dominant sources in the boundary layer and in the free troposphere. On western terrestrial flights, air mass composition is influenced by emissions from wetlands and anthropogenic activities (waste management, fossil fuel industry, and to a lesser extent the agricultural sector), while in the east, emissions are dominated by freshwater, wetlands, and the oceans, with a likely contribution from anthropogenic sources related to fossil fuels. Our results highlight the importance of the contributions from freshwater and ocean emissions. Considering the large uncertainties associated with them, our study suggests that the emissions from these aquatic sources should receive more attention in Siberia.
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:000935348600001
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/273444
作者单位	UDICE-French Research Universities; Universite Paris Cite; Universite Paris Saclay; CEA; Centre National de la Recherche Scientifique (CNRS); Centre National de la Recherche Scientifique (CNRS); Universite de Toulouse; Universite Toulouse III - Paul Sabatier
推荐引用方式 GB/T 7714	Narbaud, Clement,Paris, Jean-Daniel,Wittig, Sophie,et al. Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements[J],2023,23(3):22.
APA	Narbaud, Clement.,Paris, Jean-Daniel.,Wittig, Sophie.,Berchet, Antoine.,Saunois, Marielle.,...&Kozlov, Artem.(2023).Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(3),22.
MLA	Narbaud, Clement,et al."Disentangling methane and carbon dioxide sources and transport across the Russian Arctic from aircraft measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.3(2023):22.