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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. |
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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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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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Registro original: |
Embrapa Semiárido (CPATSA) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
02/10/2008 |
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Data da última atualização: |
02/10/2008 |
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Autoria: |
FERREIRA, A. T. S.; HAUER, V.; SILVA, E. T. da; SAUTTER, K. D. |
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Título: |
Monitoring Remediation Techniques Using Soil Mesofauna in Oil- Contaminated Soils in Araucária, Paraná, Brazil. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
In Brazil, environmental accidents involving the oil industry occur every year. One of the main
accidents occurred in July 2000, at the President Getúlio Vargas Refinery - REPAR, in Araucária,
State of Paraná, which led to the contamination of soil and the Saldanha River watershed. Several
remediation techniques were established beginning in 2000 and the soil mesofauna were chosen
as indicators of soil pollution and of the effectiveness of remediation, due to their biodiversity,
high reproduction rates and sensitivity to environmental stressing agents. The following treatments
were monitored from October 2007 to February 2008: ploughed soil without vegetation (AM1);
phyto-remediaton using bracatinga (Mimosa scabrella) (AM2); soil washing (surfactant - LESS
and hydrogen peroxide) (AM3); use of heterogeneous catalysis with titanium dioxide (AM4);
use of heterogeneous catalysis (TiO2) with adsorption using peat (Sphagnum) (AM5); control
areas not contaminated and without any treatment effects (AM6 and AM7). Nine samples per
treatment were collected, using a soil corer (0-10 cm depth), and the mesofauna was extracted
in a Modified Berlese Funnel. Soil moisture, physical and chemical parameters were also
analyzed. Acari predominated in all the samples, but Acari and Collembola were less abundant
with ploughing (AM1) at all sample dates. Highest densities of Acari and Collembola occurred
in the control (AM7) in November 2007 and January 2008. In the treatments AM4 (October and
November 2007), AM5 (November 2007 and January 2008) and AM3 (January 2008) the Acari
and Collembola populations densities were almost as high as in the control (AM7). In the remaining
treatments populations were much lower then AM7, indicating a disruption in the biological
system. MenosIn Brazil, environmental accidents involving the oil industry occur every year. One of the main
accidents occurred in July 2000, at the President Getúlio Vargas Refinery - REPAR, in Araucária,
State of Paraná, which led to the contamination of soil and the Saldanha River watershed. Several
remediation techniques were established beginning in 2000 and the soil mesofauna were chosen
as indicators of soil pollution and of the effectiveness of remediation, due to their biodiversity,
high reproduction rates and sensitivity to environmental stressing agents. The following treatments
were monitored from October 2007 to February 2008: ploughed soil without vegetation (AM1);
phyto-remediaton using bracatinga (Mimosa scabrella) (AM2); soil washing (surfactant - LESS
and hydrogen peroxide) (AM3); use of heterogeneous catalysis with titanium dioxide (AM4);
use of heterogeneous catalysis (TiO2) with adsorption using peat (Sphagnum) (AM5); control
areas not contaminated and without any treatment effects (AM6 and AM7). Nine samples per
treatment were collected, using a soil corer (0-10 cm depth), and the mesofauna was extracted
in a Modified Berlese Funnel. Soil moisture, physical and chemical parameters were also
analyzed. Acari predominated in all the samples, but Acari and Collembola were less abundant
with ploughing (AM1) at all sample dates. Highest densities of Acari and Collembola occurred
in the control (AM7) in November 2007 and January 2008. In the treatments AM4 (October and
Nov... Mostrar Tudo |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02529naa a2200157 a 4500
001 1314999
005 2008-10-02
008 2008 bl uuuu u00u1 u #d
100 1 $aFERREIRA, A. T. S.
245 $aMonitoring Remediation Techniques Using Soil Mesofauna in Oil- Contaminated Soils in Araucária, Paraná, Brazil.
260 $c2008
520 $aIn Brazil, environmental accidents involving the oil industry occur every year. One of the main accidents occurred in July 2000, at the President Getúlio Vargas Refinery - REPAR, in Araucária, State of Paraná, which led to the contamination of soil and the Saldanha River watershed. Several remediation techniques were established beginning in 2000 and the soil mesofauna were chosen as indicators of soil pollution and of the effectiveness of remediation, due to their biodiversity, high reproduction rates and sensitivity to environmental stressing agents. The following treatments were monitored from October 2007 to February 2008: ploughed soil without vegetation (AM1); phyto-remediaton using bracatinga (Mimosa scabrella) (AM2); soil washing (surfactant - LESS and hydrogen peroxide) (AM3); use of heterogeneous catalysis with titanium dioxide (AM4); use of heterogeneous catalysis (TiO2) with adsorption using peat (Sphagnum) (AM5); control areas not contaminated and without any treatment effects (AM6 and AM7). Nine samples per treatment were collected, using a soil corer (0-10 cm depth), and the mesofauna was extracted in a Modified Berlese Funnel. Soil moisture, physical and chemical parameters were also analyzed. Acari predominated in all the samples, but Acari and Collembola were less abundant with ploughing (AM1) at all sample dates. Highest densities of Acari and Collembola occurred in the control (AM7) in November 2007 and January 2008. In the treatments AM4 (October and November 2007), AM5 (November 2007 and January 2008) and AM3 (January 2008) the Acari and Collembola populations densities were almost as high as in the control (AM7). In the remaining treatments populations were much lower then AM7, indicating a disruption in the biological system.
700 1 $aHAUER, V.
700 1 $aSILVA, E. T. da
700 1 $aSAUTTER, K. D.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
Download
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