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Registros recuperados: 28
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Agua Intermedia Antártica: el pulmón del océano Pacífico OceanDocs
Carrasco, Cristina; Farías, Laura.
El cambio climático se “sumerge” al interior del océano a través de la formación de masas de agua en distintas regiones. Tal es el caso del Agua Intermedia Antártica (AAIW), la masa de agua más extendida del océano global, presente a profundidades intermedias en todas las cuencas oceánicas. El AAIW, formada al norte del Frente Polar Antártico y en las costas de Chile, estaría jugando un rol importante en la distribución de calor y sal, pero en especial de gases como el oxígeno, dióxido de carbono y óxido nitroso, por mencionar algunos
Tipo: Journal Contribution Palavras-chave: Climatic changes; Antarctic waters; Antarctic zone; Climatic change; Antarctic climate.
Ano: 2009 URL: http://hdl.handle.net/1834/4493
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Análise espacial do balanço hídrico na Caatinga da Bacia do Rio Pontal. Repositório Alice
MIRANDA, R. de Q.; GALVÍNCIO, J. D.; MOURA, M. S. B. de; JONES, C. A.; SRINIVASAN, R..
Mudanças na cobertura e uso da terra têm desencadeado mudanças drásticas na cobertura vegetal em várias partes do planeta Terra, causando grandes perdas, modificações e fragmentação de habitats, além da degradação do solo e da água, o que afeta vários microclimas, composição de espécies, interações e estrutura trófica de comunidades. Este estudo tem como objetivo analisar o balanço hídrico da Caatinga na bacia do rio Pontal. A bacia hidrográfica do rio Pontal está localizada em uma região oeste do estado de Pernambuco, e ocupa uma área de 6.057 km2. O SWAT (Soil and Water Assessment Tool) requer dados observados em quatro componentes essenciais: relevo, clima, solos, e uso e cobertura da terra. O projeto foi criado com o auxílio da ferramenta ArcSWAT, e...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Bacia do Rio Pontal; Índice de área foliar; Mudanças Climática; Climatic; Climatic changes; Caatinga; Clima; Evapotranspiração; Cobertura do Solo; Uso da Terra.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1083576
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Análisis de tendencia de series de tiempo oceanográficas y meteorológicas para determinar evidencias de cambio climático en la costa del Ecuador OceanDocs
Nieto, J.J.; Martínez, R.; Regalado, J.; Hernández, F..
El propósito de la investigación es evidenciar la influencia física del cambio climático global en la costa del Ecuador, procurando inferir escenarios más precisos a escala local, en cuanto a temperatura del mar, temperatura del aire y nivel medio del mar.
Tipo: Journal Contribution Palavras-chave: Time series; Oceanographic data; Meteorological data; Surface temperature; Mean sea level; Air temperature; Climatic changes; Climatology; Water temperature data; Coastal zone; Climatology; Meteorological data; Air temperature; Http://aims.fao.org/aos/agrovoc/c_1671; Http://aims.fao.org/aos/agrovoc/c_34149; Http://aims.fao.org/aos/agrovoc/c_230.
Ano: 2002 URL: http://hdl.handle.net/1834/2246
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Análisis del comportamiento de la salinidad (intrusión salina) en el sistema Río Guayas Canal de Jambelí como parte del cambio climático OceanDocs
Arreaga Vargas, P..
El presente trabajo permite conocer el comportamiento de la cuña salina en el sistema Río Guayas - Canal de Jambelí, conociendo que el Río Guayas abastece de agua a Guayaquil, puerto principal del país, y a muchas otras poblaciones.
Tipo: Journal Contribution Palavras-chave: Water quality; Sea level; Climatic changes; Salt-wedge estuaries; Salt wedges; Salinity gradients; Irrigation water; River water; Rivers; Water quality; Irrigation water; Rivers; Sea level; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_3958; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2000 URL: http://hdl.handle.net/1834/2274
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Breves apuntes sobre el cambio climático OceanDocs
Zambrano, E..
Las estadísticas que se manejan en muchos centros de investigación climática, los últimos 10 años han sido los más cálidos desde que se llevan registros, los científicos anuncian que en el futuro el ambiente será aún más tórrido. La mayoría de los expertos están de acuerdo en el sentido de que los humanos ejercen un impacto directo sobre este proceso de calentamiento, proceso generalmente conocido como el "efecto invernadero".
Tipo: Journal Contribution Palavras-chave: Climatic changes; Climatology; Climatology; Http://aims.fao.org/aos/agrovoc/c_1671.
Ano: 2007 URL: http://hdl.handle.net/1834/2369
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Cambio climático, sustentabilidad y gobernanza OceanDocs
Piñeiro, R.; Areces, J. A.; Salinas, E..
L as transformaciones del ambiente han acelerado a tiempos ecológicos los cambios que de otra manera tendrían lugar en lapsos de escala geológica; ello ha iniciado la era conocida por diversos especialistas como Antropoceno. 1 La crisis global asociada a esta situación ha dado lugar al surgimiento en la comunidad científica de una plataforma conceptual, no por consistente menos debatida, sobre el signifcado y las dimensiones de la sustentabilidad. En dicha plataforma adquieren espacio teorizaciones acerca de los ecosistemas,la economía ambiental,la geografía,la sociología y la ciencia cívica.
Tipo: Journal Contribution Palavras-chave: Environmental conditions; Climatic changes; Sustainability; Sustainable management; Environment management.
Ano: 2013 URL: http://hdl.handle.net/1834/5223
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Carbon dynamics in agrosystems related to land-use changes in sugar cane expansion areas int he Brazil. Repositório Alice
RONQUIM, C. C..
Recent projections of the Brazilian Ministry of Agriculture for the next 12 years, based on the recent demand for biofuels, indicate that the area planted with sugar-cane and soy bean will increase 66.6%. In this land use scenario, agriculture development will not be ruled only by food production, but also by the production of biofuels. In the context of climatic changes, the observation of these scenarios is important to inform land use policies and also to evaluate the contribution of fitomass in carbon balance and storage. Embrapa is looking for answers to inquiries on how global warming will alter the current national agricultural configuration. However, information about the importance and potential for carbon sequestration by agrosystems is still...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Climatic changes.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/972109
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Cenários agrícolas futuros para pastagens no Brasil. Infoteca-e
SANTOS, P. M.; EVANGELISTA, S. R. M.; PEZZOPANE, J. R. M..
O objetivo deste estudo foi gerar e analisar cenários futuros para a pecuária no território nacional, com base em cenários de mudanças climáticas globais e em algumas das principais espécies utilizadas como pastagens cultivadas.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Pastagem; Cenário; Brasil; Agricultura; Clima; Pastagem; Agriculture; Climatic changes; Pasture improvement.
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/988289
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Characterizing and Comparing the Spawning Habitats of Sardine (Sardinops sagax) and Anchovy (Engraulis encrasicolus) in the Northern Benguela Region OceanDocs
Tjizoo,Mbeurora Beau.
Spawning habitats of sardine and anchovy in eastern boundary current systems are characterized in an attempt to understand the fluctuations observed in their abundance. The northern Benguela, as an eastern boundary current system, is characterized by turbulent conditions that seem to govern the variability observed in the abundance of these species. Sardine and anchovy have developed mechanisms that enable them to maximize productivity. In the northern Benguela, spawning intensity is historically known to be high in periods and vicinities where turbulence is reduced. However, it is believed that selection of conditions for spawning by these species may change withfluctuations in abundance of fish.
Tipo: Theses and Dissertations Palavras-chave: Sardine fisheries; Spawning; Anchovy fisheries; Habitat; Ecosystems; Sea surface temperature; Salinity; Spatial distribution; Climatic changes; Anthropogenic factors; Pelagic environment; Circulation; Coastlines.
Ano: 2008 URL: http://hdl.handle.net/1834/5231
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Climatic changes: what if the global increase of CO2 emissions cannot be kept under control? BJMBR
Barreto de Castro,L.A..
Climatic changes threaten the planet. Most articles related to the subject present estimates of the disasters expected to occur, but few have proposed ways to deal with the impending menaces. One such threat is the global warming caused by the continuous increase in CO2 emissions leading to rising ocean levels due to the increasing temperatures of the polar regions. This threat is assumed to eventually cause the death of hundreds of millions of people. We propose to desalinize ocean water as a means to reduce the rise of ocean levels and to use this water for populations that need good quality potable water, precisely in the poorest regions of the planet. Technology is available in many countries to provide desalinated water at a justifiable cost...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Climatic changes; CO2 emissions; Global warming; Desalination of ocean water.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000300002
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Dinâmica do carbono em uma floresta manejada comercialmente no Amazonas. Repositório Alice
VASCONCELOS, R. dos S.; AZEVEDO, C. P. de; SOUZA, C. R. de; CARREIRE, M. B. F.; VASCONCELOS NETO, E. L..
O objetivo deste estudo foi avaliar os efeitos do sistema silvicultural policíclico na dinâmica de carbono de uma floresta manejada comercialmente no Amazonas.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Amazônia; Manejo florestal; Mudanças climáticas; Forest management; Climatic changes.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1048192
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Emissão de óxido nitroso do solo com aplicação de fontes de fertilizantes nitrogenados em sistema de plantio direto no Cerrado. Infoteca-e
CARVALHO, A. M. de; ALVES, B. J. R.; PEREIRA, L. L..
2010
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Plantio direto; Fertilizante; Nitrogênio; Efeito estufa; Mudança climática; No-tillage; Savanna; Nitrogen fertilizer; Gases; Greenhouse effect; Climatic changes.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/883923
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Extreme temperature trends in the equatorial region of Brazil: Case study of the state of Ceará Rev. Ciênc. Agron.
Andrade,Eunice Maia de; Silva,Bernardo Barbosa da; Rodrigues,Meilla Marielle Araújo; Mendonça,Marcos Amauri Bezerra; Chaves,Luiz Carlos Guerreiro.
Despite uncertainties as to the real causes, there is a large amount of evidence of climatic change on Earth. With the objective of investigating changes in extreme air temperatures, as well as the local effects of these changes, eight data sets, collected throughout the State of Ceará in Brazil, were analyzed. Four series of data were obtained from the semi-arid region, three from the coastal zone, and one from a mountainous region. To quantify the changes that occurred during the study period, variations in maximum and minimum temperatures were calculated in relation to the mean of each data series. The annual rates of temperature increase were estimated from the angular coefficients of the best-fit lines. The results showed that although there are...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Climatic changes; Global warming; Air temperature.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000200008
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Genesis of the sombric horizon in ultisols (red argisols) in southern Santa Catarina, Brazil Rev. Bras. Ciênc. Solo
Almeida,Jaime Antonio de; Cararo,Denis Cesar; Uberti,Antônio Ayrton Auzani.
Dark subsurface horizons, with properties similar to the sombric horizon characterized by the USA Soil Taxonomy, are frequent in Southern Brazil. The genesis of this horizon is controversial and poorly understood. This study aimed to describe the occurrence of sombric-like horizons in Ultisols in the South of Santa Catarina State, at low altitudes, and suggest possible processes of humus transference, accumulation and persistence in these horizons. Physical, chemical and mineralogical properties of four Ultisols were evaluated; three were sampled in a toposequence, and another representative one in an isolated profile (RSP). The dark subsurface horizons coincide with the AB and BA transitional genetic horizons; they are acid, low in base saturation, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dark subsurface horizon; Podzolization; Buried A horizon; Clay-humic substances; Climatic changes.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000200018
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Global climate change and the vulnerability of the Nigerian coastal zone to accelerated sea level rise: Impacts and responds. OceanDocs
Ibe, A.C..
In the recent past, climatic changes and variations have occurred in Nigeria with resulting adverse socio-economic impact. From these experiences, it is inferred that the expected change in global climate will have far reaching disastrous consequences for Nigeria if appropriate anticipatory technical and policy Measure are not taken. More recent results from various models based on an eventual warming from a doubling of greenhouse gases of between 1.5 and 5oC by the end of the 21st century predict an acceleration of the eustatic rise in sea level from 1.2-1.5mm/yr. over the last hundred year s to 4 – 6mm/yr. although previous estimates were much higher [e.g.56–3.68m by the end of the 21 century] on the low lying Coastal zone of Nigeria, which is rich in...
Tipo: Report Palavras-chave: Coastal zone management; Climatic changes.
Ano: 1990 URL: http://hdl.handle.net/1834/2406
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High temperatures on root growth and lignification of transgenic glyphosate-resistant soybean Agrociencia
Zonetti,P. da Costa; Suzuki,L. Sayuri; Bonini,E. Aparecida; Ferrarese,M. L. Lucio; Ferrarese-Filho,Osvaldo.
Glyphosate resistant transgenic soybean [Glycine max (L.) Mettill] expresses a glyphosate insensitive EPSPS (5-enolpyruvylshikimate-3-phosphate synthase). This enzyme is involved in important secondary metabolism pathways, including lignin biosynthesis. Thus, differences in lignin content and growth between susceptible (OC14) and glyphosate-resistant soybean may be observed. The objective of this study was to evaluate differences between growth and lignin content of roots in transgenic and OC14 soybean cultivated at high temperatures. Seeds from the OC14 soybean and its transgenic cultivar, CD213RR, were germinated at 25, 27.5, 30 and 32.5 °C. After 3 d, seedlings were cultivated in Hoagland half-strength nutrient solution during 12 h photoperiods and at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glyphosate; Abiotic stress; Glycine max; Plants; Climatic changes.
Ano: 2012 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000600003
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Implications of climate change on the management of Rift Valley lakes in Kenya. The case of lake Baringo OceanDocs
Ngaira, Josephine K..
Climate patterns of the World became very variable during the last half of the twentieth century. Causes of this variability/change have been identified as: Sun Spot activity, ozone depletion, decline in the solar beam, with the more pronounced especially in Africa being Increased atmospheric carbondioxide, and albedo change due to anthropogenic factors. The most affected weather elements by the above mentioned factors particularly in the tropics are Rainfall and Temperature, and the climatic environments most affected by the named weather elements are the arid and semi-arid lands which are already moisture constrained. The rift valley in Kenya, where most of the lakes are located experience Arid and Semi-Arid climate. The lakes located in this region are...
Tipo: Proceedings Paper Palavras-chave: Climatic changes; Resource management; Lake basins; Anthropogenic factors; Inland waters; Environmental impact; Water policy; Lake dynamics; Arid environments; Rainfall; Water resources.
Ano: 2006 URL: http://hdl.handle.net/1834/1472
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Inicio, duración y término de la estación lluviosa en cinco localidades de la costa ecuatoriana OceanDocs
Zambrano, E.; Hernández, F..
El objetivo de este trabajo es llegar a definir el inicio, término y duración de la estación lluviosa, mediante el análisis de datos de precipitación a fin de usar los resultados como fechas atribuibles a los cambios de estación climática presentes en la costa ecuatoriana.
Tipo: Journal Contribution Palavras-chave: Atmospheric precipitations; Rainy season; Daily; Variability; El Nino phenomena; Climatology; Climatic changes; Rainy season; Climatology.
Ano: 2007 URL: http://hdl.handle.net/1834/2507
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Leaf concentrations of nitrogen and phosphorus in phaseolus vulgaris l. Plants under high CO2 concentration and drought stress REA
Silva,João B. L. da; Ferreira,Paulo A.; Justino,Flávio; Pires,Luanna C.; Toledo,Amanda S..
This study aims to evaluate the leaf concentration of nitrogen and phosphorus correlated to the production of photoassimilates in beans plants (Phaseolus vulgaris L.) under high [CO2] and drought stress. The experiment was conducted in Viçosa (Brazil), during the period from April to July 2009, by using open-top chambers equipped with CO2 injection system. The drought stress was applied, through the irrigation suspension, during the period from flowering to maturation. The experimental design was randomized blocks in split-plot scheme with four replication, where the plots with plants grown in [CO2] of 700 mg L-1 and [CO2] environment of 380 mg L-1 and the subplots with plants with and without drought stress. The results were submitted to ANOVA and Tukey...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beans; Mineral nutrition; Photosynthesis; Climatic changes.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500012
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Memória do Workshop O Cerrado no Contexto das Mudanças Climáticas Globais. Infoteca-e
COSTA, C. J.; MOZZER, G. B.; CARVALHO, A. M. de; MULLER, A. G.; SILVA, F. A. M. da; MOREIRA, J. M. M. A. P.; MEIRELLES, M. L..
2010
Tipo: Documentos (INFOTECA-E) Palavras-chave: Cerrado; Mudanças climáticas; Agropecuária; Estratégias de mitigação; Gas; Efeito estufa; Carbono; Solo; Savanna; Climatic changes; Agriculture; Gases; Greenhouse effect; Soil; Carbon.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/883931
Registros recuperados: 28
Primeira ... 12 ... Última
 

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