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	Provedor de dados IBSS Repository (3) Autor Artemov, Yu. G. (3) Egorov, V. N. (2) Gulin, S. B. (2) De Batist, M. (1) Greinert, J. (1) Polikarpov, G. G. (1) Mais... Palavra-chave Gas bubble streams (2) Acoustic method (1) Black Sea (1) Black Sea Methane Gas seepages Hydrosphere Methane http://aims.fao.org/aos/agrovoc/c_4784 (1) Dnieper paleo-delta (1) Echosounder SIMRAD EK-500 (1) Gas hydrates (1) Methane flux (1) Methane seepage (1) Specialized software (1) Акустический метод (1) Газогидраты Methane Gas hydrates Gas seepages Methane http://aims.fao.org/aos/agrovoc/c_4784 (1) Метановые сипы (1) Программное обеспечение Acoustic data Natural gas Echosounders Natural gas http://aims.fao.org/aos/agrovoc/c_5087 (1) Струйные метановые газовыделения (1) Черное море (1) Эхолот (1) Mais... Tipo do documento Journal Contribution (3) Ano 2007 (1) 2006 (1) 2005 (1) País Ukraine (3) Idioma Inglês (2) Russo (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última 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 Software support for investigation of natural methane seeps by hydroacoustic method IBSS Repository Artemov, Yu. G.. The natural gas seepages from the sea floor are commonly recognized acoustically by the flare shaped acoustic images, spreading vertically through the water column. These acoustic images, which are made up of echoes from numerous gas bubbles, convey a lot of information about features of individual bubbles and bubbling vents in whole. To study the ecological role of methane gas bubble streams it is important to obtain such data, especially: the area of a venting site; total number of bubbles, released per a time period; size spectrum and rise velocity of bubbles at different depths through the water column. An approach based on the use of calibrated echo-sounder, digital data recording and processing techniques can provide adequate quantitative analysis of... Tipo: Journal Contribution Palavras-chave: Gas bubble streams; Acoustic method; Echosounder SIMRAD EK-500; Specialized software; Струйные метановые газовыделения; Акустический метод; Эхолот; Программное обеспечение Acoustic data Natural gas Echosounders Natural gas http://aims.fao.org/aos/agrovoc/c_5087. Ano: 2006 URL: http://repository.ibss.org.ua/dspace/handle/99011/266 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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