气候变化领域集成服务门户(CCPortal): Dissolved methane in the residual basins of the Aral Sea

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DOI	10.1088/1748-9326/ab0391
	Dissolved methane in the residual basins of the Aral Sea
	Izhitskaya E.S.; Egorov A.V.; Zavialov P.O.; Yakushev E.V.; Izhitskiy A.S.
发表日期	2019
ISSN	17489318
卷号	14 期号:6
英文摘要	Due to catastrophic desiccation, today's Aral Sea consists of a few separate residual basins, characterized by different ecological conditions (the Large Aral, Lake Tshchebas, the Small Aral). This study is the first report on dissolved methane concentrations in these basins. Overall, 48 water samples were obtained and analyzed for methane content. High values of dissolved methane in the anaerobic layer of the Large Aral Sea, including the Chernyshev Bay, are apparently caused by damping of vertical mixing and decomposition of abundant organic matter in anoxic conditions. The estimated methane flux from the surface of the Large Aral Sea is actually higher than that from many other lakes in the world. For the anoxic layer of the Large Aral, certain relations between distributions of methane and other hydrochemical parameters, including dissolved oxygen and hydrogen sulfide, were found. In the brackish Small Aral Sea, methane content was moderate. Lake Tshchebas exhibits intermediate conditions between the Large and the Small Aral seas in terms of salinity and methane concentration. The observed differences of methane content and distributions in separate residual basins are linked with the differences of their mixing and oxygenation regimes. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	anoxic conditions; biogeochemical cycle; ecology; Methane; the Aral Sea
语种	英语
scopus关键词	Anoxic water; Biogeochemistry; Dissolution; Dissolved oxygen; Ecology; Lakes; Methanation; Mixing; Sulfur compounds; Anoxic conditions; Aral Sea; Biogeochemical cycle; Dissolved methane; Ecological conditions; Hydrochemical parameters; Intermediate conditions; Methane concentrations; Methane
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154551
作者单位	Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskiy prospect, 36, Moscow, 117997, Russian Federation; Norwegian Institute for Water Research, Oslo, 0349, Norway
推荐引用方式 GB/T 7714	Izhitskaya E.S.,Egorov A.V.,Zavialov P.O.,et al. Dissolved methane in the residual basins of the Aral Sea[J],2019,14(6).
APA	Izhitskaya E.S.,Egorov A.V.,Zavialov P.O.,Yakushev E.V.,&Izhitskiy A.S..(2019).Dissolved methane in the residual basins of the Aral Sea.Environmental Research Letters,14(6).
MLA	Izhitskaya E.S.,et al."Dissolved methane in the residual basins of the Aral Sea".Environmental Research Letters 14.6(2019).