Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados 5 (3) Autor Alvarez, M (3) Mercier, Herle (2) Alvarez Salgado, X (1) Bacon, S (1) Brea, Samenta (1) Fernandez, E (1) Gourcuff, Claire (1) Kermabon, Catherine (1) Lherminier, Pascale (1) Memery, L (1) Messias, M.j. (1) Perez, F (1) Perez, Ff (1) Mais... Palavra-chave Air-sea exchange (1) Biogeochemical cycles (1) Carbon dioxide (1) Cell (1) Contrôle physique-biologique (1) Dioxyde de carbone (1) Hydrographic section (1) Meridional overturning (1) Nord-ouest de la péninsule Ibérique (1) North Atlantic circulation (1) Northwestern Iberian Peninsula (1) Physical-biological control (1) South Atlantic (1) Spatial-temporal variability (1) Variabilité spatiale-temporelle (1) Water masses (1) Échange air-mer (1) Mais... Tipo do documento Text (3) Ano 2007 (1) 2004 (1) 1999 (1) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Air-sea CO2 fluxes in a coastal embayment affected by upwelling: physical versus biological control 5 Alvarez, M; Fernandez, E; Perez, Ff. Water column pCO(2) and air-sea CO2 fluxes were studied during an 18-month period (May 1994-September 1995) in a coastal embayment affected by upwelling, located in the northwestern Iberian Peninsula (Ria de Vigo and adjacent shelf). Overall, the region acted as a net annual atmospheric CO, sink, with magnitude ranging from 0.54 mgC m(-2) d(-1) in the Ria estuary to 22 mgC m(-2) d(-1) offshore. During moderate upwelling and upwelling relaxation conditions the sampling area was a sink for atmospheric CO2. By contrast, during winter conditions and during intense upwelling the flux reversed towards the atmosphere. The relative influence of physical and biological processes on pCO(2) was evaluated using two different approaches: firstly, statistical analysis... Tipo: Text Palavras-chave: Dioxyde de carbone; Échange air-mer; Variabilité spatiale-temporelle; Contrôle physique-biologique; Nord-ouest de la péninsule Ibérique; Carbon dioxide; Air-sea exchange; Spatial-temporal variability; Physical-biological control; Northwestern Iberian Peninsula. Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43599/43983.pdf Nutrient mineralization rates and ratios in the eastern South Atlantic - art. no. C05030 5 Brea, Samenta; Alvarez Salgado, X; Alvarez, M; Perez, F; Memery, L; Mercier, Herle; Messias, M.j.. The physical and biogeochemical components of nutrients and inorganic carbon distributions along WOCE line A14 are objectively separated by means of a constrained least-squares regression analysis of the mixing of eastern South Atlantic water masses. Contrary to previous approaches, essentially devoted to the intricate South Atlantic circulation, this work is focused on the effects of circulation on nutrients and carbon biogeochemistry, with special emphasis on the stoichiometry and the rate of mineralization processes. Combination of nutrient and apparent CFC-age anomalies, derived from the mixing analysis, indicate faster mineralization rates in the equatorial (12 x 10(-2) mumol P kg(-1) yr(-1)) and subequatorial (5.3 x 10(-2) mumol P kg(-1) yr(-1)) than... Tipo: Text Palavras-chave: South Atlantic; Biogeochemical cycles; Water masses. Ano: 2004 URL: https://archimer.ifremer.fr/doc/2004/publication-836.pdf Transports across the 2002 Greenland-Portugal Ovide section and comparison with 1997 - art. no. C07003 5 Lherminier, Pascale; Mercier, Herle; Gourcuff, Claire; Alvarez, M; Bacon, S; Kermabon, Catherine. The first Ovide cruise occurred in June-July 2002 on R/V Thalassa between Greenland and Portugal. The absolute transports across the Ovide line are estimated using a box inverse model constrained by direct acoustic Doppler current profiler velocity measurements and by an overall mass balance (+/-3 Sv, where 1 Sv = 10(6) m(3) s(-1)) across the section. Main currents are studied and compared to the results of the similar Fourex section performed in August 1997 and revisited here. The meridional overturning cell (MOC) is estimated in two different ways, both leading to a significantly lower value in June 2002 than in August 1997, consistent with the relative strength of the main components of the MOC (North Atlantic Current and deep western boundary current).... Tipo: Text Palavras-chave: Hydrographic section; Cell; Meridional overturning; North Atlantic circulation. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3296.pdf Registros recuperados: 3 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco