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	Provedor de dados IBSS Repository (3) Autor Egorov, V. N. (3) Gulin, S. B. (3) Artemov, Yu. G. (2) De Batist, M. (1) Greinert, J. (1) Polikarpov, G. G. (1) Mais... Palavra-chave Black Sea (1) Black Sea Methane Gas seepages Hydrosphere Methane http://aims.fao.org/aos/agrovoc/c_4784 (1) Dnieper paleo-delta (1) Gas bubble streams (1) Gas hydrates (1) Methane flux (1) Methane seepage (1) Газогидраты Methane Gas hydrates Gas seepages Methane http://aims.fao.org/aos/agrovoc/c_4784 (1) Метановые сипы (1) Черное море (1) Mais... Tipo do documento Journal Contribution (3) Ano 2007 (1) 2005 (2) País Ukraine (3) Idioma Inglês (2) Russo (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última International workshop in Sevastopol on study of metane formation, transport pathways and the role within the carbon cycle in the Black Sea IBSS Repository Egorov, V. N.; Gulin, S. B.. Tipo: Journal Contribution Ano: 2005 URL: http://repository.ibss.org.ua/dspace/handle/99011/249 Observation of microbial carbonate build-ups growing at methane seeps near the upper boundary of the gaszhydrate stability zone in the Black sea IBSS Repository Gulin, S. B.; Greinert, J.; Egorov, V. N.; De Batist, M.; Artemov, Yu. G.. Extensive dredge sampling carried out in May-June 2004 in the deeper part of the Dnepr paleo-delta area (NW Black Sea) yielded for the first time chimney-shaped carbonate microbial build-ups, which occur at methane seeps close to upper boundary of the gas-hydrate stability zone (~ 700 m). Carbonate samples taken with a benthic trawl represent fragments of the uppermost, middle and lowest parts of the build-up; they are similar morphologically to those found previously at the shallower and deeper methane seeps in the Black Sea. At the same time, the perforated, plate-like carbonates in the lowest parts of the build-up provide first indications that gas channels are formed during the earliest growth phase of these microbial structures. Stable carbon isotope... Tipo: Journal Contribution Palavras-chave: Black Sea; Methane seepage; Gas hydrates; Черное море; Метановые сипы; Газогидраты Methane Gas hydrates Gas seepages Methane http://aims.fao.org/aos/agrovoc/c_4784. Ano: 2005 URL: http://repository.ibss.org.ua/dspace/handle/99011/215 Methane emission to the hydro- and atmosphere by gas bubble streams in the Dnieper paleo-delta, the Black Sea IBSS Repository Artemov, Yu. G.; Egorov, V. N.; Polikarpov, G. G.; Gulin, S. B.. To estimate methane flux from natural gas bubble streams (seepages) a combined approach was applied, inclusive of detailed echo survey of investigated area and data analysis with the use of specialized software, GIS technique and mathematic simulation. A precise location map of methane seepages in the Dnieper paleo-delta region was obtained. In total 2200 seepages were identified at the investigated area of 378.1 sq.km, which release 16.74 106 m³ at atmospheric pressure (STP), or 12.0 10-3 teragram (Tg) methane a year. Statistical distribution of individual seepage methane flux rates conforms to the lognormal law. We found that 1.9 % of methane from gas bubble streams reaches the atmosphere in gas phase, while 98.1 % dissolves in the water column. Thus,... Tipo: Journal Contribution Palavras-chave: Gas bubble streams; Methane flux; Dnieper paleo-delta; Black Sea Methane Gas seepages Hydrosphere Methane http://aims.fao.org/aos/agrovoc/c_4784. Ano: 2007 URL: http://repository.ibss.org.ua/dspace/handle/99011/622 Registros recuperados: 3 Primeira ... 1 ... Última

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