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| Registros recuperados : 72 | |
| 11. |  | PRAGANA, R. B.; NÓBREGA, R. S. A.; RIBEIRO, M. R.; LUSTOSA FILHO, J. F. Atributos biológicos e dinâmica da matéria orgânica em latossolos amarelos na região do Cerrado piauiense sob sistema plantio direto Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 36, n. 3, p. 851-858, maio/jun. 2012. Título em Inglês: Effect of cropping systems on biological properties and organic matter dynamics of yellow oxisols in the Cerrado region of Piauí, Brazil.| Biblioteca(s): Embrapa Solos / UEP-Recife. |
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| 13. | | FELIZOLA, E. R.; LAGO, F. P. L.; OLIVEIRA, V. A. S.; NÓBREGA, R. C. Planejamento físico rural de projeto de reflorestamento do Grupo Ceval Alimentos no Município de Cristalina - GO utilizando-se técnicas de geoprocessamento. In: INTERNATIONAL CONGRESS AND EXHIBITION ON FOREST, 5., 1999, Curitiba. Forest 99: [resumos]. Rio de Janeiro: BIOSFERA, 1999. 1 CD-ROM. Autoria bilíngue: CONGRESSO E EXPOSICAO INTERNACIONAL SOBRE FLORESTAS, 5., 1999, Curitiba.| Biblioteca(s): Embrapa Florestas. |
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| 14. | | CABRAL, L. M. C.; FERNANDES, L. O.; NOBREGA, R.; ROSENTHAL, A.; FREITAS, S. P.; COURI, S. Recuperacao de proteinas de um hidrolisado de soja atraves de processos com membranas. In: CONGRESSO BRASILEIRO DE SOJA, 1999, Londrina, PR. Anais...Londrina: Embrapa Soja, 1999. p.434.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 18. | | CABRAL, L. M. C.; NOBREGA, R.; FREITAS, S. P.; FERNANDES, L. O.; ROSENTHAL, A.; COURI, S. Utilization of membrane technology to recover a by-product of the enzymatic extraction of soybean oil. In: CONGRESSO INTERNACIONAL DE TECNOLOGIA LIMPA APLICADA AO SETOR DE ALIMENTOS, 1., ago., 1999, Florianopolis. Programa... Florianopolis: UFSC, 1999. p.10.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 20. | | MOREIRA, F. M. de S.; NOBREGA, R. S. A.; CARVALHO, F. de; SILVA, K. da. Bactérias associativas fixadoras de nitrogênio atmosférico. In: MOREIRA, F. M. S. de; CARES, J. E.; ZANETTI, R.; STÜMER, S. L. (Ed.). O ecossistema solo: componentes, relaçãoes ecológicas e efeitos na produção vegetal.Lavras : UFLA, 2013| Biblioteca(s): Embrapa Roraima. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
07/07/2020 |
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Data da última atualização: |
07/07/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
FERREIRA, T. R.; SILVA, B. S. da; MOURA, M. S. B. de; VERHOEF, A.; NÓBREGA, R. L. B. |
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Afiliação: |
Thomás R. Ferreira; Bernardo B. da Silva; MAGNA SOELMA BESERRA DE MOURA, CPATSA; Anne Verhoef; Rodolfo L. B. Nóbrega. |
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Título: |
The use of remote sensing for reliable estimation of net radiation and its components: a case study for contrasting land covers in an agricultural hotspot of the Brazilian semiarid region. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 291, sept. 2020. |
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Idioma: |
Inglês |
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Conteúdo: |
This study aims to ascertain the uncertainties related to the spatiotemporal estimation of net radiation, and its components, using remote sensing data. Geographical focus is an irrigated agricultural hotspot of the Brazilian semiarid region, for which we also investigate the impact that contrasting land-cover types have on the upwelling radiation balance components, and hence on net radiation. Instantaneous (Rn) and daily (Rn,24) values of net radiation were estimated based on OLI/TIRS-Landsat-8 images and key weather variables. In addition, we evaluated two models for downwelling shortwave (Rsw), ten models for downwelling longwave radiation (Rlw), and two models for derivation of Rn,24. The accuracy of each model was evaluated with radiation measurements obtained from research quality sensors installed in micrometeorological towers. The best performances were found for the Allen model, Duarte model, and De Bruin model for Rsw, Rlw, and Rn,24, respectively. The contrasting land-use types exhibited substantial differences in the biophysical variables and radiative properties that affect Rn. The albedo for the irrigated crops has average absolute values that are 0.01?0.03 greater than those found for the pristine caatinga, whereas the land surface temperature, LST, is 3?5 degrees smaller. However, Rn for these two distinctly different surface types was similar, as a result of a considerably lower surface emissivity in the caatinga. For rangeland, the albedo, LST, and hence the upwelling radiation had greater values than those found for the caatinga, which caused reduced values of Rn. The urban areas exhibited the lowest values of Rn, mainly as a consequence of their high albedo values. We show that when in-situ net radiation data are not available, remote sensing data combined with more readily available in-situ weather data can be used to derive spatiotemporal estimates of Rn. This facilitates the identification of anthropogenic impacts on the radiation at the land-surface and ultimately the energy balance, including the short-term seasonal and long-term effects. MenosThis study aims to ascertain the uncertainties related to the spatiotemporal estimation of net radiation, and its components, using remote sensing data. Geographical focus is an irrigated agricultural hotspot of the Brazilian semiarid region, for which we also investigate the impact that contrasting land-cover types have on the upwelling radiation balance components, and hence on net radiation. Instantaneous (Rn) and daily (Rn,24) values of net radiation were estimated based on OLI/TIRS-Landsat-8 images and key weather variables. In addition, we evaluated two models for downwelling shortwave (Rsw), ten models for downwelling longwave radiation (Rlw), and two models for derivation of Rn,24. The accuracy of each model was evaluated with radiation measurements obtained from research quality sensors installed in micrometeorological towers. The best performances were found for the Allen model, Duarte model, and De Bruin model for Rsw, Rlw, and Rn,24, respectively. The contrasting land-use types exhibited substantial differences in the biophysical variables and radiative properties that affect Rn. The albedo for the irrigated crops has average absolute values that are 0.01?0.03 greater than those found for the pristine caatinga, whereas the land surface temperature, LST, is 3?5 degrees smaller. However, Rn for these two distinctly different surface types was similar, as a result of a considerably lower surface emissivity in the caatinga. For rangeland, the albedo, LST, and hence t... Mostrar Tudo |
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Palavras-Chave: |
Balanço energético; Radiação de ondas longas; Radiação solar no fundo do poço; Semiárido. |
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Thesagro: |
Caatinga; Radiação Solar; Sensoriamento Remoto. |
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Thesaurus NAL: |
Energy balance; Land use change; Remote sensing; Solar radiation. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03102naa a2200301 a 4500
001 2123699
005 2020-07-07
008 2020 bl uuuu u00u1 u #d
100 1 $aFERREIRA, T. R.
245 $aThe use of remote sensing for reliable estimation of net radiation and its components$ba case study for contrasting land covers in an agricultural hotspot of the Brazilian semiarid region.$h[electronic resource]
260 $c2020
520 $aThis study aims to ascertain the uncertainties related to the spatiotemporal estimation of net radiation, and its components, using remote sensing data. Geographical focus is an irrigated agricultural hotspot of the Brazilian semiarid region, for which we also investigate the impact that contrasting land-cover types have on the upwelling radiation balance components, and hence on net radiation. Instantaneous (Rn) and daily (Rn,24) values of net radiation were estimated based on OLI/TIRS-Landsat-8 images and key weather variables. In addition, we evaluated two models for downwelling shortwave (Rsw), ten models for downwelling longwave radiation (Rlw), and two models for derivation of Rn,24. The accuracy of each model was evaluated with radiation measurements obtained from research quality sensors installed in micrometeorological towers. The best performances were found for the Allen model, Duarte model, and De Bruin model for Rsw, Rlw, and Rn,24, respectively. The contrasting land-use types exhibited substantial differences in the biophysical variables and radiative properties that affect Rn. The albedo for the irrigated crops has average absolute values that are 0.01?0.03 greater than those found for the pristine caatinga, whereas the land surface temperature, LST, is 3?5 degrees smaller. However, Rn for these two distinctly different surface types was similar, as a result of a considerably lower surface emissivity in the caatinga. For rangeland, the albedo, LST, and hence the upwelling radiation had greater values than those found for the caatinga, which caused reduced values of Rn. The urban areas exhibited the lowest values of Rn, mainly as a consequence of their high albedo values. We show that when in-situ net radiation data are not available, remote sensing data combined with more readily available in-situ weather data can be used to derive spatiotemporal estimates of Rn. This facilitates the identification of anthropogenic impacts on the radiation at the land-surface and ultimately the energy balance, including the short-term seasonal and long-term effects.
650 $aEnergy balance
650 $aLand use change
650 $aRemote sensing
650 $aSolar radiation
650 $aCaatinga
650 $aRadiação Solar
650 $aSensoriamento Remoto
653 $aBalanço energético
653 $aRadiação de ondas longas
653 $aRadiação solar no fundo do poço
653 $aSemiárido
700 1 $aSILVA, B. S. da
700 1 $aMOURA, M. S. B. de
700 1 $aVERHOEF, A.
700 1 $aNÓBREGA, R. L. B.
773 $tAgricultural and Forest Meteorology$gv. 291, sept. 2020.
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