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Registros recuperados: 35
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Air preheating systems for low-temperature drying International Rice Research Institute
Aldas, Rizaldo E..
xix, 217 leaves ; ill. Thesis (M.S.) -- University of the Philippines
Tipo: Thesis Palavras-chave: Rice; Drying; Air temperature; Air drying.
Ano: 1997 URL: http://hdl.handle.net/123456789/590
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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 climático de los últimos 30 años, en las costas de Esmeraldas, Manta y Puerto Bolívar durante la época húmeda OceanDocs
Gálvez, H.; Del Salto, M. B.; Regalado, J..
This study was done to evaluate possible changes in the behavior of the data series of the chosen parameters (temperatures and precipitation). Results reflect as light increase in the mean and standard deviation of the surface temperature and sea surface temperature in the humid season, between 1975-2000 period compared with 1981-2010 period, being consistent with the trend of increasing temperatures.
Tipo: Journal Contribution Palavras-chave: Climatology; Air temperature; Surface temperature.
Ano: 2013 URL: http://hdl.handle.net/1834/5746
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Bromeliads production in greenhouses associated to different shading screens Horticultura Brasileira
Holcman,Ester; Sentelhas,Paulo Cesar.
Bromeliads production in greenhouses is highly influenced by microclimate, which affects plants growth and development. Based on that, this study aimed to evaluate the influence of shading screens of different colors on microclimatic variables and Aechmea fasciata bromeliad growth in a greenhouse covered by transparent low-density polyethylene. The experiment had five treatments, with screens of different colors, inside a plastic greenhouse: thermo-reflective (T1); control without screen (T2); red (T3); blue (T4); and black (T5) screens, all of them with 70% of shading. From the 60 plants arranged in each one of the treatments 24 were evaluated, which were obtained randomly. The statistical design was completely randomized for the biometric variables. An...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aechmea fasciata; Plant growth; Solar radiation; Air temperature.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000300008
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Características climáticas del océano Atlántico sudoccidental OceanDocs
Hoffmann, J.; Núñez, M.; Piccolo, M.C..
The climate of the SW Atlantic Ocean is described for representative summer and winter months. The description is based on mean fields of surface and upperair metereological measurements. Maps and data have been obtained from national and international information centers. Other sources also were considered. The Malvinas Current is a year-round sink for the sensitive heatflux. The Malvinas and Brazil Currents and their zone of confluence are the most important oceanographic and climate features in the region of South Atlantic Ocean.
Tipo: Book Section Palavras-chave: Climatology; Air temperature; Surface temperature; Winds; Atmospheric circulation; Energy balance; Climatology; Winds; Atmospheric circulation; Air temperature; Energy balance; Http://aims.fao.org/aos/agrovoc/c_1671; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_29546; Http://aims.fao.org/aos/agrovoc/c_230; Http://aims.fao.org/aos/agrovoc/c_2566.
Ano: 1997 URL: http://hdl.handle.net/1834/1723
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Características de las precipitaciones, la temperatura del aire y los vientos en la costa ecuatoriana OceanDocs
Gálvez, H.; Regalado, J..
Con el fin de ampliar el conocimiento de las características de la climatología de la costa ecuatoriana, los parámetros: precipitación, temperatura superficial del aire y vientos pertenecientes a la serie de datos desde 1948 al 2006 se analizaron estadísticamente. Se determinaron las normales mensuales de las siete estaciones que posee el INOCAR a lo largo de la costa.
Tipo: Journal Contribution Palavras-chave: Atmospheric precipitations; Climatology; Air temperature; Winds; Climatology; Winds; Air temperature; Http://aims.fao.org/aos/agrovoc/c_1671; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_230.
Ano: 2007 URL: http://hdl.handle.net/1834/2364
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Características físico-químicas de las aguas del Paso Drake durante el verano 1988 OceanDocs
Allauca, S.; Valencia Trejo, M..
Un análisis de parámetros físicos y químicos se realizó en el Paso Drake en base a datos obtenidos durante el trayecto del BAE ORION hacia y desde la Península Antártica. La investigación efectuada en esta área forma parte de la Primera Expedición Ecuatoriana a la Antártica, realizada durante el verano 1988. Los datos de temperatura medidos con probetas de XBT, proporcionaron una clara visión de la estructura térmica de cada sección hasta los 500 metros. Se determinaron las posiciones de los diferentes Frentes y Zonas tanto por las condiciones subsuperficiales como por sus expresiones superficiales. La presencia de un anillo o masa de agua subsuperficial relativamente fría dentro de la Zona del Frente Polar permite pensar que corresponde a Agua Superficial...
Tipo: Journal Contribution Palavras-chave: Chemical oceanography; Surface water; Surface temperature; Air temperature; Salinity; Nutrients (mineral); Polar fronts; Chemical oceanography; Surface water; Air temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_1516; Http://aims.fao.org/aos/agrovoc/c_25317; Http://aims.fao.org/aos/agrovoc/c_230; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1989 URL: http://hdl.handle.net/1834/3874
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Cardinal temperatures and thermal requirements for the initial development of two Brazilian native species PAB
Ferreira,Mábele de Cássia; Martins,Fabrina Bolzan; Florêncio,Gabriel Wilson Lorena; Silva,João Pedro Guimarães Cândido; Pasin,Liliana Auxiliadora Avelar Pereira.
Abstract: The objective of this work was to estimate the cardinal temperatures and to quantify the thermal requirements for the initial development of seedlings of the native tree species Citharexylum myrianthum and Bixa orellana. A field experiment was carried out in a completely randomized design, in a 2?12 factorial arrangement (2 tree species and 12 sowing dates), with five replicates. The base, optimum, and maximum temperatures for the development of C. myrianthum were 11.4, 18.1, and 36.6°C, and, for B. orellana, 12.0, 18.4, and 46.4°C. The thermal requirements for the development of C. myrianthum was 66.7°C day per leaf, and, for B. orellana, 82.5°C day per leaf. In the initial development, B. orellana shows a large thermal amplitude and is tolerant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bixa orellana; Citharexylum myrianthum; Air temperature; Leaf appearance; Phenology.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000100903
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Cardinal temperatures for the leaf development of Corymbia citriodora and Eucalyptus urophylla seedlings PAB
Freitas,Cleverson Henrique de; Martins,Fabrina Bolzan; Abreu,Marcel Carvalho.
Abstract: The objective of this work was to estimate cardinal temperatures and phyllochron for the leaf development of the eucalyptus species Corymbia citriodora and Eucalyptus urophylla, in the seedling phase. A field experiment was carried out in a completely randomized design, in a 2x11 factorial arrangement, with the two eucalyptus species, 11 sowing dates, and five replicates, in the municipality of Itajubá, in the state of Minas Gerais, Brazil. The cardinal temperatures - base, optimum, and maximum - for leaf development were, respectively, 8.7, 17.1, and 41.3°C, for C. citriodora, and 11.5, 17.1, and 40.5°C for E. urophylla. The phyllochron of C. citriodora was 62.95°C day per leaf, and that of E. urophylla was 46.03°C day per leaf, which indicates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Air temperature; Leaf emission rate; Phyllochron; Seedling quality; Thermal requirement.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000500283
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Climate change and the occurrence of downy mildew in Brazilian grapevines PAB
Angelotti,Francislene; Hamada,Emília; Magalhães,Edineide Elisa; Ghini,Raquel; Garrido,Lucas da Ressureição; Pedro Júnior,Mário José.
Abstract: The objective of this work was to evaluate the potential impact of climate change on the occurrence of grapevine downy mildew in Brazil. Seedlings containing four to six leaves were sprayed with a sporangia suspension containing 105 sporangia per milliliter. After spraying, the seedlings were subjected to temperatures of 26, 28, 29.1, 30.4, and 31.8°C for 24 hours. The percentage of diseased leaf area and the latent period were evaluated. Maps of the geographic and temporal distribution of the disease were made considering the monthly average of the mean air temperature and leaf wetness duration for the reference climate or climate normal (1961-1990) and the future climates (2011-2040, 2041-2070, and 2071-2100), considering the A2 and B1 gas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plasmopara viticola; Vitis; Air temperature; Geographical information system..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000600426
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Climatic effects on sugarcane ripening under the influence of cultivars and crop age Scientia Agricola
Cardozo,Nilceu Piffer; Sentelhas,Paulo Cesar.
The lack of information about the effects of cultivars, crop age and climate on the sugarcane (Saccharum ssp.) crop yield and quality has been the primary factor impacting the sugar-ethanol sector in Brazil. One of the processes about which we do not have a satisfactory understanding is sugarcane ripening and the effects of cultivars, crop age and climate on that. Sugarcane ripening is the process of sucrose accumulation in stalks, which is heavily influenced by several factors, mainly by climatic conditions such as air temperature and water deficits. Because it is a complex process, studies of the variables involved in sugarcane ripening can provide important information, resulting in a better use of commercial cultivars, bringing advantages to growers,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saccharum spp; Air temperature; Precipitation; Water deficit; Sucrose.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600011
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Estructura termal y distribución superficial del clorofila "a" en el Paso Drake durante el verano austral de 1989-1990 OceanDocs
Zambrano Q., E.; Allauca, S.; Arcos, F..
En el verano austral de 1990, durante la II Expedición Ecuatoriana a la Antártica a bordo del B/I ORION se efectuaron dos secciones (ida y retorno) en el Paso Drake, en las cuales se realizaron un total de 28 lances de XBT y el muestreo horario de parámetros superficiales como temperatura del mar, del aire, salinidad, vientos y clorofila "a". Los resultados obtenidos en ambas secciones permiten observar la variación de estos parámetros, en el transcurso aproximado de un mes, en el Paso Drake durante aquella época. Claramente, en las secciones verticales de temperatura, se observa la presencia de los Frentes Polar y Subantártico, dando lugar a una marcada convergencia Antártica. En el transcurso de casi un mes entre las dos secciones, se puede observar el...
Tipo: Journal Contribution Palavras-chave: Surface temperature; Air temperature; Salinity; Winds; Chlorophylls; Winds; Air temperature; Salinity; Chlorophylls; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_230; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_1577.
Ano: 1990 URL: http://hdl.handle.net/1834/3729
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Estudio del comportamiento de ondas lineales barotrópicas en la atmósfera tropical y el litoral ecuatoriano-colombiano en un período determinado OceanDocs
Martínez, R..
Usando series de tiempo de promedios diarios de presión atmosférica, temperatura ambiental, temperatura superficial y nivel medio del mar en los años 1994-1995 en cinco estaciones costeras de Ecuador y Colombia y una estación en las Islas galápagos (Ecuador) se aplicaron las técnicas del análisis espectral para determinar las oscilaciones existentes en el océano y la atmósfera. Se obtuvieron con alto niveles de coherencia, cinco modos predominantes en la atmósfera tropical: la oscilación de 37 días, muy próxima a la oscilación de Madden-Julian (1972), un modo de tres semanas con características de la " autooscilación" de 21 días, Murakami, 1974 y que es de naturaleza planetaria, una tercera oscilación de 17 días, de características muy similares a la onda...
Tipo: Journal Contribution Palavras-chave: Barotropic motion; Water waves; Spectral analysis; Time series; Oceanographic data; Fixed stations; Water temperature data; Air temperature; Atmospheric pressure; Mean sea level; Atmospheric pressure; Spectral analysis; Air temperature; Http://aims.fao.org/aos/agrovoc/c_693; Http://aims.fao.org/aos/agrovoc/c_28964; Http://aims.fao.org/aos/agrovoc/c_230.
Ano: 1998 URL: http://hdl.handle.net/1834/2199
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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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Factors affecting attack rate of whitefly on the eggplant PAB
Leite,Germano Leão Demolin; Picanço,Marcelo; Guedes,Raul Narciso Carvalho; Moreira,Márcio Dionizio.
The objective of this study was to determine the effects of weather, predators and parasitoids, canopy height and plant age, leaf chemical composition, levels of leaf N and K and leaf trichomes on the intensity of Bemisia tabaci attack on Solanum melongena. A higher density of nymph and whitefly adults was recorded at the base and medium of the plant compared to the apex. A higher number of eggs was observed on the medium part than on the apical and base part of the plants dossel. An increase in the density of whitefly is associated with an increase in temperature.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bemisia tabaci; Solanum melongena; Allelochemicals; Parasitoids; Air temperature.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000400014
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Fomesafen toxicity to bean plants as a function of the time of application and herbicide dose Agronomy
Cieslik, Lucas Fernando; Universidade Tecnológica Federal do Paraná; Vidal, Ribas Antônio; Universidade Federal do Rio Grande do Sul; Trezzi, Michelangelo Muzell; Universidade Tecnológica Federal do Paraná.
The objectives of the present study were to evaluate the impact of the time of fomesafen application and its dose on the tolerance of the common bean crop and to investigate the influence of environmental variables on herbicide selectivity. Two field experiments were conducted using the time of fomesafen application and its dose as factors. Crop injury from fomesafen reached 20% when evaluated one week after treatment (WAT). When sprayed at the warmest times of the day when irradiance levels were at their highest (11h00 and 16h00), fomesafen phytotoxicity was higher compared with other application times. Increased values of these two environmental variables, especially luminosity, was associated with high levels of fomesafen injury to the bean crop....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomia; Produção vegetal; Fitotecnia environmental variables; Air temperature; Luminosity; Selectivity Herbicidologia; Plantas daninhas.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17630
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Greenhouses covering materials: a comparative study CIGR Journal
Fadel, Moustafa Amin; Bani Hammad, Bani A.; AlHosany, Faisal; Iwaimer, Osama.
Greenhouse covering material is the most governing member of the construction which controls two major parameters, the amount of light and heat diffused from the surrounding environment into the internal space. In hot areas, balancing between optimum temperature and maximum light intensity inside the greenhouse consumes most of the energy spent in vegetable production systems. In this research, a special testing stand was fabricated to simulate the structure of a typical greenhouse provided with a 400W full spectrum light as a source of light and heat. Tests were carried out to investigate the effectiveness of different commercial covering material in light and heat diffusion. Twenty one combinations of Fiberglass, Polyethylene, Polycarbonate, Plexiglass...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering greenhouse; Enthalpy; Air temperature; Light transmittance; Covering materials.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3240
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Impacts of climatic changes on the vegetative development of olive cultivars AGRIAMBI
Florêncio,Gabriel W. L.; Martins,Fabrina B.; Ferreira,Mábele de C.; Pereira,Rodolfo A. de A..
ABSTRACT The aim of this study was to simulate the vegetative development of the olive cultivars Arbequina and MGS ASC315 cultivated in Maria da Fé, MG, Brazil (22° 18’ 29” S, 45° 22’ 31” W, 1.276 m of altitude). The development of these cultivars was simulated in nine transplanting dates, considering three distinct scenarios for three periods (2011-2040, 2041-2070 and 2071-2100). Climate changes influence the olive crop management. The increase in air temperature modifies the development rate and the duration of the seedling phase of the cultivars Arbequina and MGSASC315. In colder months, there is accelerated vegetative development and shorter seedling phase duration. Conversely, in warmer months, there is delayed development with longer seedling phase...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Olea europaea L.; Phenology; Air temperature.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000900641
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Methane fluxes from waterlogged and drained Histosols of highland areas Rev. Bras. Ciênc. Solo
Rachwal,Marcos Fernando Glück; Zanatta,Josiléia Acordi; Dieckow,Jeferson; Denega,Genuir Luis; Curcio,Gustavo Ribas; Bayer,Cimélio.
Soil can be either source or sink of methane (CH4), depending on the balance between methanogenesis and methanotrophy, which are determined by pedological, climatic and management factors. The objective of this study was to assess the impact of drainage of a highland Haplic Histosol on CH4 fluxes. Field research was carried out in Ponta Grossa (Paraná, Brazil) based on the measurement of CH4 fluxes by the static chamber method in natural and drained Histosol, over one year (17 sampling events). The natural Histosol showed net CH4 eflux, with rates varying from 238 µg m-2 h-1 CH4, in cool/cold periods, to 2,850 µg m-2 h-1 CH4, in warm/hot periods, resulting a cumulative emission of 116 kg ha-1 yr-1 CH4. In the opposite, the drained Histosol showed net...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Greenhouse gas; Water sources; Water-table; Gravimetric moisture; Air temperature; Rainfall.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200013
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Methodology for the spatialisation of a reference evapotranspiration from SRTM data Rev. Ciênc. Agron.
Oliveira,Joaquim Branco de; Arraes,Francisco Dirceu Duarte; Viana,Paula Carneiro.
The aim of this work was to develop a methodology for the spatialisation of mean monthly reference evapotranspiration for the State of Ceará, using the Hargreaves and Samani equation, from estimated air-temperature data based on digital elevation models. The study area is located in northeastern Brazil, between the latitudes 2.5º and 8º South and longitudes 37º and 42º West. The data used in the study are from the network of meteorological stations of the National Institute of Meteorology. The equation proposed by Hargreaves and Samani was used to estimate ET, being spatialised in the form of maps using the Idrisi Andes© software for the manipulation of digital data of latitude, longitude and altitude in order to obtain the variables of the equation. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digital elevation model; Hargreaves and Samani; Air temperature; GIS.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300005
Registros recuperados: 35
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