Flux Radiation
Mostrando 1-12 de 84 artigos, teses e dissertações.
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1. Radiation Balance and Partitioning of Latent and Sensible Heat Fluxes Over a Lime Orchard in Eastern Amazon
Abstract We investigate the balance of radiation and energy over a lime orchard in Eastern Amazon and how it relates to environmental conditions. We found that lime trees aged between 6 and 7 years old reflect 11.0% to 14.5% of incoming shortwave radiation, and the latent heat flux corresponds to 57.6% and 66.6% of the daily net radiation in the dry season (
Revista Brasileira de Meteorologia. Publicado em: 2022
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2. Evaluation of OSEB and SEBAL models for energy balance of a crop area in a humid subtropical climate
ABSTRACT This study evaluated the adequacy of the One-Source Energy Balance (OSEB) and Surface Energy Balance Algorithm for Land (SEBAL) models to estimate evapotranspiration in grain growing areas with humid subtropical climate in Rio Grande do Sul, southern Brazil. The dataset was obtained from a micrometeorological station (Eddy Covariance) and MODIS (Mod
Bragantia. Publicado em: 01/11/2018
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3. Investigating Space Radiation Environment Effects on Communication of Razaksat-1
ABSTRACT: This study attempted to identify whether space radiation sources could have affected the communication on RazakSAT-1 that was orbiting in a Low Earth Orbit-Near Equatorial (LEO-NEqO). Data on galactic cosmic rays (GCR), trapped protons, trapped electrons, and solar energetic particles (SEPs) obtained from Space Environment Information System (SPENV
J. Aerosp. Technol. Manag.. Publicado em: 03/05/2018
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4. Energy balance partitioning and evapotranspiration from irrigated Muskmelon under Semi-Arid Conditions
ABSTRACT The Mossoró-Assu-Baraúna district, Rio Grande do Norte State (RN), is recognized by the intense production of horticulture, mainly muskmelon for export. However, this region is often devastated by intense droughts. Thus, the muskmelon production is predominantly under irrigated condition and, due to constant threat of water resources collapse on t
Bragantia. Publicado em: 2018-03
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5. REFERENCE EVAPOTRANSPIRATION FORECASTING BY ARTIFICIAL NEURAL NETWORKS
ABSTRACT: Evapotranspiration (ET) is the main component of water balance in agricultural systems and the most active variable of the hydrological cycle. In the literature, few studies have used the forecast the day before via Artificial Neural Networks (ANNs) for the northern region of São Paulo state, Brazil. Therefore, this aimed to predict the reference
Eng. Agríc.. Publicado em: 2017-12
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6. Hourly interaction between wind speed and energy fluxes in Brazilian Wetlands - Mato Grosso - Brazil
ABSTRACT Matter and energy flux dynamics of wetlands are important to understand environmental processes that govern biosphere-atmosphere interactions across ecosystems. This study presents analyses about hourly interaction between wind speed and energy fluxes in Brazilian Wetlands - Mato Grosso - Brazil. This study was conducted in Private Reserve of Natura
An. Acad. Bras. Ciênc.. Publicado em: 01/12/2016
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7. Swirl Injection Effects on Hybrid Rocket Motors
ABSTRACT: In the last decades, hybrid rocket engines have been increasingly studied and used in space vehicles. However, the low regression rates and specific impulses still represent major drawbacks to this technology. The objective of this study was to quantify the relative improvement of regression rate values with the use of a swirling flow injector in c
J. Aerosp. Technol. Manag.. Publicado em: 2015-12
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8. TURBULENT EXCHANGE OF SCALARS ABOVE AND WITHIN AN ARAUCARIA FOREST IN SOUTHERN BRAZIL / TROCAS TURBULENTAS DE ESCALARES ACIMA E NO INTERIOR DE UMA FLORESTA DE ARAUCÁRIA NO SUL DO BRASIL
Turbulent exchange of scalars is analyzed for a year of turbulence data, above and within an Araucaria Forest in southern Brazil. Sensible and latent heat fluxes, as well as CO2 fluxes are calculated by the eddy covariance method and analyzed in terms of the seasonal variation of their daily cycles. Diurnal and nocturnal vertical velocity spectra, sensible a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/07/2011
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9. Modelagem da radiação térmica em chamas laminares da combustão de metano em ar
This work analyses the effects of thermal radiation heat transfer on methane-air laminar diffusion flames. The analysis is based on the solution of the equations of continuity, fluid motion, species mass-fraction and enthalpy. The soot formation is accounted with a twoequation model while a chemistry mecanism with 112 reactions is used for the combustion of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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10. Nitrate reductase activity in field-grown pueraria lobata (Kudzu) in southeastern Brazil.
Although Pueraria lobata (Willd.) Ohwi (P. thunbergiana) (Sieb. & Zucc.) Benth.) is thus ecologically and economically important in much to world, its physiological ecology and other factor contributing to its invasive growth are not well understood. Nitrate reductase activity (NRA) measurements have long been used to indicate the effect of changes in the en
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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11. Analysis of energy fluxes and vegetation-atmosphere parameters in irrigated and natural ecosystems of semi-arid Brazil.
Knowledge on evapotranspiration is essential in quantifying water use depletion and to allocate scarce water resources to competing uses. Despite that an extensive literature describes the theoretical mechanisms of turbulent water vapour transport above and within crop canopies fewer studies have examined land surface parameters within composite landscapes o
Journal of Hydrology. Publicado em: 2011
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12. Balanço de energia de uma pastagem cultivada no cerrado.
RESUMO: O cerrado possui aproximadamente 208 milhões de hectares sendo 49 milhões de pastagens cultivadas. O objetivo deste trabalho foi apresentar o balanço de energia na superfície de uma pastagem de Brachiaria brizantha cv. Marandu localizada na região central do cerrado (Planaltina - GO). O estudo foi realizado de 15/11 a 09/12/2001, inicio da esta�
Planaltina. Publicado em: 2011