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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
15/03/2017 |
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Data da última atualização: |
20/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
HILKER, T.; GALVÃO, L. S.; ARAGÃO, L. E. O. C.; MOURA, Y. M. de; AMARAL, C. H. do; LYAPUSTIN, A. I.; WU, J.; ALBERT, L. P.; FERREIRA, M. J.; ANDERSON, L. O.; SANTOS, V. A. H. F. dos; PROHASKA, N.; TRIBUZY, E.; CERON, J. V. B.; SALESKA, S. R.; WANG, Y.; GONÇALVES, J. F. de C.; OLIVEIRA JUNIOR, R. C. de; RODRIGUES, J. V. F. C.; GARCIA, M. N. |
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Afiliação: |
Thomas Hilker, University of Southampton / Oregon State University; Lênio Soares Galvão, INPE; Luiz E. O. C. Aragão, INPE; Yhasmin M. de Moura, INPE; Cibele H. do Amaral, UFV; Alexei I. Lyapustin, NASA Goddard Space Flight Center; JIN WU, Environmental and Climate Sciences Department, Brookhaven National Lab / University of Arizona; Loren P. Albert, University of Arizona; Marciel José Ferreira, UFAM; Liana O. Anderson, Centro Nacional de Monitoramento e Alertas de Desastres Naturais (CEMADEN); Victor A. H. F. dos Santos, INPA; Neill Prohaska, University of Arizona; Edgard Tribuzy, INPA; João Vitor Barbosa Ceron, INPA; Scott R. Saleska, University of Arizona; Yujie Wang, University of Maryland Baltimore County; José Francisco de Carvalho Gonçalves, INPA; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; João Victor Figueiredo Cardoso Rodrigues, UFAM; Maquelle Neves Garcia, INPA. |
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Título: |
Vegetation chlorophyll estimates in the Amazon from multi-angle MODIS observations and canopy reflectance model. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
International Journal of Applied Earth Observation and Geoinformation, v. 58, p. 278-287, June 2017. |
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DOI: |
http://dx.doi.org/10.1016/j.jag.2017.01.014 |
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Idioma: |
Inglês |
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Conteúdo: |
As a preparatory study for future hyperspectral missions that can measure canopy chemistry, we introduce a novel approach to investigate whether multi-angle Moderate Resolution Imaging Spectroradiometer (MODIS) data can be used to generate a preliminary database with long-term estimates of chlorophyll. MODIS monthly chlorophyll estimates between 2000 and 2015, derived from a fully coupled canopy reflectance model (ProSAIL), were inspected for consistency with eddy covariance fluxes, tower-based hyperspectral images and chlorophyll measurements. MODIS chlorophyll estimates from the inverse model showed strong seasonal variations across two flux-tower sites in central and eastern Amazon. Marked increases in chlorophyll concentrations were observed during the early dry season. Remotely sensed chlorophyll concentrations were correlated to field measurements (r2 = 0.73 and r2 = 0.98) but the data deviated from the 1:1 line with root mean square errors (RMSE) ranging from (Tapajós tower) to 0.470 (Manaus tower). The chlorophyll estimates were consistent with flux tower measurements of photosynthetically active radiation (PAR) and net ecosystem productivity (NEP). We also applied ProSAIL to mono-angle hyperspectral observations from a camera installed on a tower to scale modeled chlorophyll pigments to MODIS observations (r2 = 0.73). Chlorophyll pigment concentrations (ChlA+B) were correlated to changes in the amount of young and mature leaf area per month (0.59 ; r2 ; 0.64). Increases in MODIS observed ChlA+B were preceded by increased PAR during the dry season (0.61; 0.62) and followed by changes in net carbon uptake. We conclude that, at these two sites, changes in LAI, coupled with changes in leaf chlorophyll, are comparable with seasonality of plant productivity. Our results allowed the preliminary development of a 15-year time series of chlorophyll estimates over the Amazon to support canopy chemistry studies using future hyperspectral sensors. MenosAs a preparatory study for future hyperspectral missions that can measure canopy chemistry, we introduce a novel approach to investigate whether multi-angle Moderate Resolution Imaging Spectroradiometer (MODIS) data can be used to generate a preliminary database with long-term estimates of chlorophyll. MODIS monthly chlorophyll estimates between 2000 and 2015, derived from a fully coupled canopy reflectance model (ProSAIL), were inspected for consistency with eddy covariance fluxes, tower-based hyperspectral images and chlorophyll measurements. MODIS chlorophyll estimates from the inverse model showed strong seasonal variations across two flux-tower sites in central and eastern Amazon. Marked increases in chlorophyll concentrations were observed during the early dry season. Remotely sensed chlorophyll concentrations were correlated to field measurements (r2 = 0.73 and r2 = 0.98) but the data deviated from the 1:1 line with root mean square errors (RMSE) ranging from (Tapajós tower) to 0.470 (Manaus tower). The chlorophyll estimates were consistent with flux tower measurements of photosynthetically active radiation (PAR) and net ecosystem productivity (NEP). We also applied ProSAIL to mono-angle hyperspectral observations from a camera installed on a tower to scale modeled chlorophyll pigments to MODIS observations (r2 = 0.73). Chlorophyll pigment concentrations (ChlA+B) were correlated to changes in the amount of young and mature leaf area per month (0.59 ; r2 ; 0.64). Incre... Mostrar Tudo |
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Thesagro: |
Clorofila; Fenologia. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 03195naa a2200397 a 4500
001 2067032
005 2022-05-20
008 2017 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.jag.2017.01.014$2DOI
100 1 $aHILKER, T.
245 $aVegetation chlorophyll estimates in the Amazon from multi-angle MODIS observations and canopy reflectance model.$h[electronic resource]
260 $c2017
520 $aAs a preparatory study for future hyperspectral missions that can measure canopy chemistry, we introduce a novel approach to investigate whether multi-angle Moderate Resolution Imaging Spectroradiometer (MODIS) data can be used to generate a preliminary database with long-term estimates of chlorophyll. MODIS monthly chlorophyll estimates between 2000 and 2015, derived from a fully coupled canopy reflectance model (ProSAIL), were inspected for consistency with eddy covariance fluxes, tower-based hyperspectral images and chlorophyll measurements. MODIS chlorophyll estimates from the inverse model showed strong seasonal variations across two flux-tower sites in central and eastern Amazon. Marked increases in chlorophyll concentrations were observed during the early dry season. Remotely sensed chlorophyll concentrations were correlated to field measurements (r2 = 0.73 and r2 = 0.98) but the data deviated from the 1:1 line with root mean square errors (RMSE) ranging from (Tapajós tower) to 0.470 (Manaus tower). The chlorophyll estimates were consistent with flux tower measurements of photosynthetically active radiation (PAR) and net ecosystem productivity (NEP). We also applied ProSAIL to mono-angle hyperspectral observations from a camera installed on a tower to scale modeled chlorophyll pigments to MODIS observations (r2 = 0.73). Chlorophyll pigment concentrations (ChlA+B) were correlated to changes in the amount of young and mature leaf area per month (0.59 ; r2 ; 0.64). Increases in MODIS observed ChlA+B were preceded by increased PAR during the dry season (0.61; 0.62) and followed by changes in net carbon uptake. We conclude that, at these two sites, changes in LAI, coupled with changes in leaf chlorophyll, are comparable with seasonality of plant productivity. Our results allowed the preliminary development of a 15-year time series of chlorophyll estimates over the Amazon to support canopy chemistry studies using future hyperspectral sensors.
650 $aAmazonia
650 $aClorofila
650 $aFenologia
700 1 $aGALVÃO, L. S.
700 1 $aARAGÃO, L. E. O. C.
700 1 $aMOURA, Y. M. de
700 1 $aAMARAL, C. H. do
700 1 $aLYAPUSTIN, A. I.
700 1 $aWU, J.
700 1 $aALBERT, L. P.
700 1 $aFERREIRA, M. J.
700 1 $aANDERSON, L. O.
700 1 $aSANTOS, V. A. H. F. dos
700 1 $aPROHASKA, N.
700 1 $aTRIBUZY, E.
700 1 $aCERON, J. V. B.
700 1 $aSALESKA, S. R.
700 1 $aWANG, Y.
700 1 $aGONÇALVES, J. F. de C.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aRODRIGUES, J. V. F. C.
700 1 $aGARCIA, M. N.
773 $tInternational Journal of Applied Earth Observation and Geoinformation$gv. 58, p. 278-287, June 2017.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
05/07/2007 |
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Data da última atualização: |
19/01/2024 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
CABRAL, A. C. P. L. F.; AZOUBEL, P. M.; SILVA, F. O. da; SOUSA, R. M. de; CAMPOS, A. B. |
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Afiliação: |
ANA CLARA PAES LANDIM FERREIRA CABRAL, UPE; PATRICIA MOREIRA AZOUBEL, CPATSA; FRANCINAIDE OLIVEIRA DA SILVA, UPE; RENATA MAGALHÃES DE SOUSA, CEFET, Petrolina, PE; ANANDRÉIA BARBOSA CAMPOS, CEFET, Petrolina, PE. |
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Título: |
Cinética de secagem de manga variedade Tommy Atkins com e sem pré-tratamento osmótico. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMI-ÁRIDO, 1., 2006, Petrolina. Anais... Petrolina: Embrapa Semi-Árido, 2006. |
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Páginas: |
p. 27-31. |
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Série: |
(Embrapa Semi-Árido. Documentos, 197). |
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Idioma: |
Português |
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Conteúdo: |
O processo de secagem de manga variedade Tommy Atkins com e sem prétratamento osmótico foi conduzido em um secador de leito fixo em três diferentes temperaturas (50, 60 e 70°C). O aumento da temperatura favoreceu a transferência de massa e as amostras que sofreram pré-tratamento atingiram a condição de equilíbrio em menor tempo, entretanto com valores de umidade superiores à fruta in natura. |
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Palavras-Chave: |
Osmótico; Tommy Atkins. |
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Thesagro: |
Manga; Temperatura; Tratamento; Variedade. |
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Thesaurus NAL: |
Mangoes. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/197525/1/SDC197-1.pdf
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Marc: |
LEADER 01246nam a2200265 a 4500
001 1147078
005 2024-01-19
008 2006 bl uuuu u00u1 u #d
100 1 $aCABRAL, A. C. P. L. F.
245 $aCinética de secagem de manga variedade Tommy Atkins com e sem pré-tratamento osmótico.$h[electronic resource]
260 $aIn: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMI-ÁRIDO, 1., 2006, Petrolina. Anais... Petrolina: Embrapa Semi-Árido$c2006
300 $ap. 27-31.
490 $a(Embrapa Semi-Árido. Documentos, 197).
520 $aO processo de secagem de manga variedade Tommy Atkins com e sem prétratamento osmótico foi conduzido em um secador de leito fixo em três diferentes temperaturas (50, 60 e 70°C). O aumento da temperatura favoreceu a transferência de massa e as amostras que sofreram pré-tratamento atingiram a condição de equilíbrio em menor tempo, entretanto com valores de umidade superiores à fruta in natura.
650 $aMangoes
650 $aManga
650 $aTemperatura
650 $aTratamento
650 $aVariedade
653 $aOsmótico
653 $aTommy Atkins
700 1 $aAZOUBEL, P. M.
700 1 $aSILVA, F. O. da
700 1 $aSOUSA, R. M. de
700 1 $aCAMPOS, A. B.
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