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Diurnal variation of methane emission from a paddy field in Brazilian Southeast. Repositório Alice
LIMA, M. A. de; PAZIANOTTO, R. A. A.; VILLELA, O. V.; PARAIBA, L. C..
Abstract: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55? S, 45°30? W), Brazil. Different CH4 emission...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Flooded rice; Methane flux; Arroz irrigado por inundação; Fluxo de metano; Estágio de desenvolvimento da planta; Energia de ativação; Arroz Inundado; Metano; Temperatura do Solo; Rice; Greenhouse gas emissions; Methane; Developmental stages; Plant development; Activation energy.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093715
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Diurnal variation of methane emission from a paddy field in Brazilian Southeast Ciência Rural
Lima,Magda Aparecida de; Pazianotto,Ricardo Antonio Almeida; Villela,Omar Vieira; Paraíba,Lourival Costa.
ABSTRACT: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55’ S, 45°30’ W), Brazil. Different CH4 emission...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flooded rice; Methane flux; Plant development stage; Activation energy.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400251
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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
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Современные представления о средообразующей и экологической роли струйных метановых газовыделений со дна Черного моря IBSS Repository
Егоров, В. Н.; Поликарпов, Г. Г.; Гулин, С. Б.; Артемов, Ю. Г.; Стокозов, Н. А.; Костова, С. К..
Дано обобщение современного уровня исследований струйных метановых газовыделений в Черном море. Приводится карта локализации полей газовыделений в Черном море, а также распределение метановых сипов по глубине и по вертикальной протяженности газовых струй. Описаны физико-химические характеристики пузырьков — состав газа, размеры, скорость всплытия, а также осредненные по площади дна оценки потока метана в водную толщу. Анализируются данные о влиянии метановых сипов на биологическую продуктивность вод, структуру звукорассеивающих слоев (ЗРС) и трансформацию физико-химических форм ртути. Обсуждаются результаты химических, изотопных и микробиологических исследований образцов карбонатных построек в местах струйных выходов метана. Рассматриваются вопросы...
Tipo: Journal Contribution Palavras-chave: Черное море; Струйные метановые газовыделения; Поток метана; Карбонатные постройки; Бактериальные маты; Радиоуглеродный возраст; The Black Sea; Gas bubble streams; Methane flux; Carbonate chimneys; Bacterial mats; Radiocarbon age.
Ano: 2003 URL: http://repository.ibss.org.ua/dspace/handle/99011/149
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