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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: |
06/02/2018 |
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Data da última atualização: |
02/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
WU, J.; KOBAYASHI, H.; STARK, S. C.; MENG, R.; GUAN, K.; TRAN, N. N.; GAO, S.; YANG, W.; RESTREPO-COUPE, N.; MIURA, T.; OLIVEIRA JUNIOR, R. C. de; ROGERS, A.; DYE, D. G.; NELSON, B. W.; SERBIN, S. P.; HUETE, A. R.; SALESKA, S. R. |
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Afiliação: |
Jin Wu, University of Arizona / Brookhaven National Laboratory; Hideki Kobayashi, Japan Agency for Marine-Earth Science and Technology; Scott C. Stark, Michigan State University; Ran Meng, Brookhaven National Laboratory; Kaiyu Guan, University of Illinois at Urbana Champaign; Ngoc Nguyen Tran, University of Technology Sydney; Sicong Gao, University of Technology Sydney; Wei Yang, Chiba University; Natalia Restrepo-Coupe, University of Arizona; Tomoaki Miura, University of Havaii; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; Alistair Rogers, Brookhaven National Laboratory; Dennis G. Dye, Northern Arizona University; Bruce W. Nelson, INPA; Shawn P. Serbin, Brookhaven National Laboratory; Alfredo R. Huete, University of Technology Sydney; Scott R. Saleska, University of Arizona. |
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Título: |
Biological processes dominate seasonality of remotely sensed canopy greenness in an Amazon evergreen forest. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
New Phytologist, v. 217, n. 4, p. 1507-1520, Mar. 2018. |
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DOI: |
10.1111/nph.14939 |
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Idioma: |
Inglês |
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Conteúdo: |
Satellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fraction and/or in leaf demography. Canopy RTMs (PROSAIL and FLiES), driven by these three factors combined, simulated satellite-observed seasonal patterns well, explaining c. 70% of the variability in a key reflectance-based vegetation index (MAIAC EVI, which removes artifacts that would otherwise arise from clouds/aerosols and sun?sensor geometry). Leaf area index, leafless crown fraction and leaf demography independently accounted for 1, 33 and 66% of FLiES-simulated EVI seasonality, respectively. These factors also strongly influenced modeled near-infrared (NIR) reflectance, explaining why both modeled and observed EVI, which is especially sensitive to NIR, captures canopy seasonal dynamics well. Our improved analysis of canopy-scale biophysics rules out satellite artifacts as significant causes of satellite-observed seasonal patterns at this site, implying that aggregated phenology explains the larger scale remotely observed patterns. This work significantly reconciles current controversies about satellite-detected Amazon phenology, and improves our use of satellite observations to study climate?phenology relationships in the tropics. MenosSatellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fraction and/or in leaf demography. Canopy RTMs (PROSAIL and FLiES), driven by these three factors combined, simulated satellite-observed seasonal patterns well, explaining c. 70% of the variability in a key reflectance-based vegetation index (MAIAC EVI, which removes artifacts that would otherwise arise from clouds/aerosols and sun?sensor geometry). Leaf area index, leafless crown fraction and leaf demography independently accounted for 1, 33 and 66% of FLiES-simulated EVI seasonality, respectively. These factors also strongly influenced modeled near-infrared (NIR) reflectance, explaining why both modeled and observed EVI, which is especially sensitive to NIR, captures canopy seasonal dynamics well. Our improved analysis of canopy-scale biophysics rules out satellite artifacts as significant causes of satellite-observed seasonal patterns at this site, implying that aggregated phenology explains the larger scale remotely observed patterns. This work significantly reconciles current controversies about satellite-detected Amazon phenology, and improves our use of satellite... Mostrar Tudo |
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Palavras-Chave: |
Sazonalidade. |
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Thesagro: |
Fenologia; Floresta tropical. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02563naa a2200361 a 4500
001 2087194
005 2018-05-02
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1111/nph.14939$2DOI
100 1 $aWU, J.
245 $aBiological processes dominate seasonality of remotely sensed canopy greenness in an Amazon evergreen forest.$h[electronic resource]
260 $c2018
520 $aSatellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fraction and/or in leaf demography. Canopy RTMs (PROSAIL and FLiES), driven by these three factors combined, simulated satellite-observed seasonal patterns well, explaining c. 70% of the variability in a key reflectance-based vegetation index (MAIAC EVI, which removes artifacts that would otherwise arise from clouds/aerosols and sun?sensor geometry). Leaf area index, leafless crown fraction and leaf demography independently accounted for 1, 33 and 66% of FLiES-simulated EVI seasonality, respectively. These factors also strongly influenced modeled near-infrared (NIR) reflectance, explaining why both modeled and observed EVI, which is especially sensitive to NIR, captures canopy seasonal dynamics well. Our improved analysis of canopy-scale biophysics rules out satellite artifacts as significant causes of satellite-observed seasonal patterns at this site, implying that aggregated phenology explains the larger scale remotely observed patterns. This work significantly reconciles current controversies about satellite-detected Amazon phenology, and improves our use of satellite observations to study climate?phenology relationships in the tropics.
650 $aFenologia
650 $aFloresta tropical
653 $aSazonalidade
700 1 $aKOBAYASHI, H.
700 1 $aSTARK, S. C.
700 1 $aMENG, R.
700 1 $aGUAN, K.
700 1 $aTRAN, N. N.
700 1 $aGAO, S.
700 1 $aYANG, W.
700 1 $aRESTREPO-COUPE, N.
700 1 $aMIURA, T.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aROGERS, A.
700 1 $aDYE, D. G.
700 1 $aNELSON, B. W.
700 1 $aSERBIN, S. P.
700 1 $aHUETE, A. R.
700 1 $aSALESKA, S. R.
773 $tNew Phytologist$gv. 217, n. 4, p. 1507-1520, Mar. 2018.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| 5. |  | AUER, C. G.; GRIGOLETTI JUNIOR, A.; BIZZI, R. M.; SANTOS, E. C. dos. Espécies de patógenos invasores potenciais para plantios de pínus e eucalipto no Brasil. In: SIMPÓSIO BRASILEIRO SOBRE ESPÉCIES EXÓTICAS INVASORAS, 1., 2005, Brasília, DF. Palestras, comunicações orais, painéis. Brasília, DF: Ministério do Meio Ambiente, 2005. Sessão de Painéis.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Florestas. |
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| 10. | | JUNQUEIRA, N. T. V.; SANTOS, E. C. DOS; JUNQUEIRA, K. P.; FALEIRO, F. G.; BELLON, G.; BRAGA, M. F. Caracteristícas físico-químicas e produtividade de acessos de Passiflora nitida Kunth procedentes do centro-norte do Brasil. Revista Brasileira de Fruticultura, Jaboticabal, v. 32, n. 3, p. 791-797, set. 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Cerrados. |
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| 11. | | RIET-CORREA, F.; MENDEZ, M. del C.; SCHILD, A. L.; SANTOS, E. C. dos; SCARIS, R. M. Experimentos em coelhos sugerem Nierembergia veitchii como causa de calcinose enzoótica em ovinos do Rio Grande do Sul. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 16, n. 5, p. 727-732, set./out. 1981 Título em inglês: Experiments the rabbits suggest Nierembergia veitchii as a cause of enzootic calcinosis in sheep of Rio Grande do Sul, Brazil.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 12. | | ASSIS, G. M. L. de; SANTOS, E. C. dos; SALES, M. F. L.; ANDRADE, C. M. S. de. Cultivares de amendoim forrageiro avaliadas no período de transição água-seca e no período seco do ano. In: WORKSHOP SOBRE TOLERÂNCIA ESTRESSES ABIÓTICOS, 1., 2013, Campo Grande, MS. Anais... Campo Grande, MS: Embrapa Gado de Corte, 2013. p. 26-36. (Embrapa Gado de Corte. Documentos, 199).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| 17. | | YOKOMIZO, G. K. I.; COSTA, L. do N.; FURTADO, R. G.; SANTOS, E. C. dos; SANTOS, I. C. dos. Diversidade vegetal, uso agrícola, política fundiária e perspectivas do cerrado amapaense de 2018 a 2022. In: CASTRO, A. C.; LEITE, D. S.; SILVA, M. da F. F. da; SANCHES, A. G.; CARDOSO, D. da S.; (ed.). Tópicos atuais em desenvolvimento regional e urbano. Guarujá, SP: Científica Digital, 2022. Cap. 14, p. 222 - 244.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Amapá. |
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| 18. | | BELLON, G.; SANTOS, E. C. dos; JUNQUEIRA, K. P.; JUNQUEIRA, N. T. V.; FALEIRO, F. G.; BRAGA, M. F. Seleção de acessos nativos de Passiflora nitida Kunth procedentes do centro-norte do Brasil com base em características físico-químicas e produtividade. In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 5., 2009, Guarapari, ES. O melhoramento e os novos cenários da agricultura: anais. Vitória: SBMP: Incaper, 2009. (Incaper. Documentos, 11). 4 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Cerrados. |
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| 20. | | LIMA, J. S. S. de; BEZERRA NETO, F.; THÉ PONTES, F. S.; GOMES, E. G.; SANTOS, E. C. dos; MEDEIROS. M. A. de; SOUSA, J. C. R. de. Avaliação agroeconômica de sistemas consorciados de cenoura e rúcula. In: REUNIÃO ANUAL DA REGIÃO BRASILEIRA DA SOCIEDADE INTERNACIONAL DE BIOMETRIA, 54; SIMPÓSIO DE ESTATÍSTICA APLICADA À EXPERIMENTAÇÃO AGRONÔMICA, 13., 2009, São Carlos, SP.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 54 | |
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