Net Radiation Balance
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. EVAPOTRANSPIRAÇÃO DA MELANCIA IRRIGADA POR MEIO DO SEBAL, BALANÇO HÍDRICO E CORRELAÇÕES TURBULENTAS / ESTIMATING IRRIGATED WATERMELON EVAPOTRANSPIRATION USING SEBAL, SOIL-WATER BALANCE AND EDDY CORRELATIONS
In applications of the SEBAL (Surface Energy Balance Algorithm for Land) algorithm parameters for physical processes adjusted for other regions of the planet are commonly used. Therefore, there is a need for validation of the estimates made with the algorithm compared with other conventional methods of estimating evapotranspiration. Thus, this study main goa
Publicado em: 2009
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14. Water and energy fluxes in cowpea and castor beans cultivated in northeast Brazil / Fluxos de Ãgua e de energia em feijÃo macassar e mamona no nordeste do Brasil
The castor beans and cowpea are crops of enormous economic and social importance for the farmers in northeast Brazil, whereas the extracted oil of seeds of castor beans is used for production of biodiesel and the cowpea is the main food for poor population. Independent of crop type, the knowledge of water amount removed from soil by vegetation is of great in
Publicado em: 2009
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15. Mapeamento das estimativas do saldo de radiação e índices de vegetação em área do estado de Alagoas com base em sensores remotos. / Mapping of the estimates of the balance of radiation and indices of vegetation in an area of the state of Alagoas based on remote sensing.
The balance of radiation at the surface is of great importance in studies related to the flow of heat in the atmosphere, particularly in agricultural crops in areas and basins. This work mapped the components of the radiation balance of the land surface and vegetation indices of the area with the river basin Pratagy in Alagoas, by means of remote sensing dat
Publicado em: 2008
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16. TURBULENT FLOWS OF CO2 IN A RICE CROP IRRIGATED IN RS (BRAZIL) / FLUXOS TURBULENTOS DE CO2 EM UMA ÁREA DE ARROZ IRRIGADO NO RS
This thesis quantifies the net change of CO2 (NEE) in an irrigated rice crop cultivation in RS (Brazil). The research is part of the project CT-HIDRO, which presents as main purpose the description of surface conditions for different ecosystems in the country. Data were gathered during the cultivation period, from October 2003 to March 2004. During this time
Publicado em: 2007
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17. Surface fire spread model based on lumped parameter approach / Modelo de propagação de fogo em incêndios de superfície baseado no método nodal
This work presents a new approach for a surface re spread model applicable to wildland re modelling. The mathematical method used in the modeling is the lumped parameter approach. In this method the thermal domain is divided in a nite number of volumes, supposed isothermal and with homogeneous properties, called nodes. To each node are attributed a temperatu
Publicado em: 2007
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18. Balanço de radiação, energia e fluxo de CO2 em ecossistema de manguezal na Amazônia / Radiation and energy balance and fluxes of CO2 in a Amazon mangrove ecosystem
This work use the longest series of continuous meteorological data and fluxes measurements of CO2, sensible heat and latent heat made in Amazon mangrove ecosystem. The series used in this study corresponds to the period of November, 2002 to August, 2003. The meteorological data were collected using an EDISOL system based on the hedí covariance technique. Th
Publicado em: 2006
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19. Albedo of an Amazon tropical rainforest: field measurements, remote sensing, modeling, and its influence on the regional climate / Albedo de uma floresta tropical Amazônica: medições de campo, sensoriamento remoto, modelagem, e sua influência no clima regional
Albedo is defined as a ratio between reflected solar radiation and incoming solar radiation over a surface. It is a main factor that affects the terrestrial radiation balance and has been frequently considered in the global and regional climate studies. Amazon is one of planets regions where the response of regional atmospheric circulation is more intense. S
Publicado em: 2006
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20. Evapotranspiration of passionfruit and crop coefficient determined by energy balance and lysimeter hydraulic weighing. / Evapotranspiração e coeficiente de cultivo de maracujazeiros determinados pelo método do balanço de radiação e lisimetria de pesagem hidráulica.
This work was carried out at the experimental irrigation farm of the Engineering Department - College of Agriculture Luiz de Queiroz - ESALQ/USP in Piracicaba, São Paulo, State. The 83-day-old passiflora seedlings (Passiflora edulis Sims f. flavicarpa Deg cv. IAC 275) were transplanted to experimental units with rows planted based on North- South and East-W
Publicado em: 2005
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21. BalanÃo hÃdrico e de energia em solo cultivado e sem vegetaÃÃo, para as condiÃÃes do brejo paraibano / Water and energy balance in the cultivated and bare soil in a montane area in paraiba, Brazil
In the areas of rainfed agriculture it is very important to quantify losses of water by evapotranspiration and soil evaporation. The methods used for measuring evapotranspiration and/or evaporation varies from direct measurements techniques, using lysimeters, to measurements of the water and energy balances. The precision lysimeters have high cost, being onl
Publicado em: 2004
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22. Evapotranspiração do capim tanzânia (Panicum maximum Jacq.) e grama batatais (Paspalum notatum flugge) utilizando o método do balanço de energia e lisímetro de pesagem. / Evapotranspiration of guinea grass (panicum maximum jacq) and bahia grass (paspalum notatum flugge) using energy balance method and weighing lysimeter.
Pasture irrigation presented a large growth in Brazil in recent years. However, the lack of research on pasture water use has led to inefficient irrigation management practices. The objectives of this work were: to evaluate the relationships between global solar irradiance and net radiation on surfaces covered with Guinea grass (Panicum maximum Jacq.) and Ba
Publicado em: 2003
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23. Estudo do balanço de radiação em área de policultivo na amazônia / Study of radiation balance over Amazonian policulture area
Micrometeorological observations have been used to study the radiation balance over recultivation areas of the SHIFT Project in the Central Amazon, during the dry season. The site was first cleared of primary forest to make way for an experimental rubber plantation which was abandoned soon after. Later, the secondary forest which had evolved was cleared and
Publicado em: 2000
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24. The Susceptibility of Photosynthesis to Photoinhibition and the Capacity of Recovery in High and Low Light Grown Cyanobacteria, Anacystis nidulans
The susceptibility of photosynthesis to photoinhibition and the rate of its recovery were studied in the cyanobacterium Anacystis nidulans grown at a low (10 micromoles per square meter per second) and a high (120 micromoles per square meter per second) photosynthetically active radiation. The rate of light limited photosynthetic O2 evolution was measured to