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DOI	10.1016/j.atmosenv.2021.118823
	Analysis of atmospheric greenhouse gases in north Xinjiang
	Liu L.; He F.; Xie X.; Deng L.; Xu L.; Zhang X.; Xia L.
发表日期	2022
ISSN	1352-2310
卷号	268
英文摘要	Flask air samples were collected weekly at the Akedala (AKD) regional atmosphere station in north Xinjiang, China, and atmospheric carbon dioxide (CO2) and methane (CH4) mole fractions were measured using cavity-ring down spectroscopy. AKD station is under a typical temperate continental semiarid and arid monsoon climate with westerly air flow. This paper presents the long-term trends and seasonal variations in atmospheric CO2 and CH4 concentrations for the first time and discusses the possible influencing mechanisms. The CO2 and CH4 background mixing ratios were 412.1 ± 0.36 ppm and 1968.9 ± 0.95 ppb, respectively, in 2018. The growth rates were 2.62 ppm y−1 and 9.67 ppb y−1 for CO2 and CH4, respectively, during 2010–2018, which were higher than the surface measurements at Waliguan Baseline Observatory at similar latitudes. The averaged CO2 seasonal cycle showed a minimum in summer and a maximum in winter, and the annual amplitude was high at 18.7 ppm. The CH4 seasonal cycle showed a rapid recovery in summer during July and August. Back-trajectory analysis showed that the atmospheric information at AKD station can provide some implications for uptake from Kazakhstan and Russia, as well as information about natural and anthropogenic emissions in northern Xinjiang. This study revealed that the long-term upward trend of the CO2 concentration in AKD might be attributed to emissions from energy consumption of heavy industry. The comprehensive effects of livestock, geological micro seepage and oil and gas production, and vertical transport also enhanced the atmospheric CH4 concentrations. The results of this study may improve our basic understanding of observed atmospheric CO2 and CH4 in China and Central Asia and the underlying fluxes to be used in atmospheric inversion models. © 2021 Elsevier Ltd
关键词	Emission source Greenhouse gases Impact analysis Variation character
语种	英语
scopus关键词	Agriculture; Atmospheric chemistry; Energy utilization; Greenhouse gases; Light measurement; Surface measurement; Air samples; Atmospheric CO 2; Atmospheric greenhouse; CH 4; Emission sources; Greenhouses gas; Impact analysis; Seasonal cycle; Variation character; Xinjiang; Carbon dioxide; carbon dioxide; methane; anthropogenic effect; anthropogenic source; carbon dioxide; methane; seepage; summer; westerly; agricultural waste; air monitoring; air sampling; airflow; Article; atmospheric dispersion; atmospheric transport; biomass production; boundary layer; cavity ring down spectroscopy; circannual rhythm; cluster analysis; concentration ratio; data correlation; energy consumption; geographic elevation; geographic mapping; grazing; greenhouse gas; growth rate; high temperature; human activities; hypobarism; industrial production; industrial waste; latitude; livestock; marine environment; mass; maximum entropy model; oil and gas field; photosynthesis; pollution transport; seasonal variation; spectroscopy; summer; time series analysis; trend study; vegetation; winter; China; Jiangxi; Xin River
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248142
作者单位	China Meteorological Administration Meteorological Observation Centre (CMA-MOC)Beijing 100081, China; XinJiang Uygur Autonomous Region Meteorological Service, Urumchi, 830000, China; Akeda Regional Background Station, China Meteorological Administration (CMA)Xinjiang, China; Jiangxi Climate Center, Nanchang, 330096, China
推荐引用方式 GB/T 7714	Liu L.,He F.,Xie X.,et al. Analysis of atmospheric greenhouse gases in north Xinjiang[J],2022,268.
APA	Liu L..,He F..,Xie X..,Deng L..,Xu L..,...&Xia L..(2022).Analysis of atmospheric greenhouse gases in north Xinjiang.ATMOSPHERIC ENVIRONMENT,268.
MLA	Liu L.,et al."Analysis of atmospheric greenhouse gases in north Xinjiang".ATMOSPHERIC ENVIRONMENT 268(2022).