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Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
02/03/2017 |
Data da última atualização: |
24/04/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MIRANDA, R. de Q.; GALVÍNCIO, j. d.; MOURA, M. S. B. de; JONES, C. A.; SRINIVASAN, R. |
Afiliação: |
RODRIGO DE QUEIROGA MIRANDA, UFPE; JOSICLÊDA DOMICIANO GALVÍNCIO, UFPE; MAGNA SOELMA BESERRA DE MOURA, CPATSA; CHARLES ALLAN JONES, Spatial Sciences Laboratory, Texas A&M University, College Station, TX 77845, USA; RAGHAVAN SRINIVASAN, Spatial Sciences Laboratory, Texas A&M University, College Station, TX 77845, USA. |
Título: |
Reliability of MODIS Evapotranspiration Products for Heterogeneous Dry Forest: A Study Case of Caatinga. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Advances in Meteorology, v. 2017, n. 2, p. 1-14, jan. 2017. |
DOI: |
10.1155/2017/9314801 |
Idioma: |
Inglês |
Conteúdo: |
Evapotranspiration (ET) is normally considered as the sum of all water that evaporates from the soil and transpires from plants. However, accurately estimating ET from complex landscapes can be difficult because of its high spatial heterogeneity and diversity of driver factors, which make extrapolation of data from a point to a larger area quite inaccurate. In this paper, we hypothesize that MODIS products can be of use to estimate ET in areas of Caatinga vegetation, the hydrology of which has not been adequately studied. The experiment was conducted in a preserved level area of Caatinga in which meteorological and water flux measures were taken throughout 2012 by eddy covariance. Evapotranspiration estimates fromeddy covariance were comparedwith remotely sensed evapotranspiration estimates from MOD16A2 and SAFER products. Correlations were performed at monthly, 8-day, and daily scales; and produced ??2 values of monthly scale = 0.92, 8-day scale = 0.88, and daily scale = 0.85 for the SAFER algorithm. Monthly MOD16A2 data produced a value of ??2 = 0.82, and they may be useful because they are free, downloadable, and easy to use by researchers and governments. |
Palavras-Chave: |
MODIS. |
Thesagro: |
Caatinga; Evapotranspiração; Planta; Solo. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 01889naa a2200241 a 4500 001 2065853 005 2017-04-24 008 2017 bl uuuu u00u1 u #d 024 7 $a10.1155/2017/9314801$2DOI 100 1 $aMIRANDA, R. de Q. 245 $aReliability of MODIS Evapotranspiration Products for Heterogeneous Dry Forest$bA Study Case of Caatinga.$h[electronic resource] 260 $c2017 520 $aEvapotranspiration (ET) is normally considered as the sum of all water that evaporates from the soil and transpires from plants. However, accurately estimating ET from complex landscapes can be difficult because of its high spatial heterogeneity and diversity of driver factors, which make extrapolation of data from a point to a larger area quite inaccurate. In this paper, we hypothesize that MODIS products can be of use to estimate ET in areas of Caatinga vegetation, the hydrology of which has not been adequately studied. The experiment was conducted in a preserved level area of Caatinga in which meteorological and water flux measures were taken throughout 2012 by eddy covariance. Evapotranspiration estimates fromeddy covariance were comparedwith remotely sensed evapotranspiration estimates from MOD16A2 and SAFER products. Correlations were performed at monthly, 8-day, and daily scales; and produced ??2 values of monthly scale = 0.92, 8-day scale = 0.88, and daily scale = 0.85 for the SAFER algorithm. Monthly MOD16A2 data produced a value of ??2 = 0.82, and they may be useful because they are free, downloadable, and easy to use by researchers and governments. 650 $aCaatinga 650 $aEvapotranspiração 650 $aPlanta 650 $aSolo 653 $aMODIS 700 1 $aGALVÍNCIO, j. d. 700 1 $aMOURA, M. S. B. de 700 1 $aJONES, C. A. 700 1 $aSRINIVASAN, R. 773 $tAdvances in Meteorology$gv. 2017, n. 2, p. 1-14, jan. 2017.
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Embrapa Semiárido (CPATSA) |
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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
06/09/2005 |
Data da última atualização: |
22/08/2019 |
Tipo da produção científica: |
Folder/Folheto/Cartilha |
Autoria: |
ARAÚJO, J. P. |
Afiliação: |
JOSÉ PIRES ARAUJO, CPATSA. |
Título: |
Cebola. |
Ano de publicação: |
1978 |
Fonte/Imprenta: |
Piracicaba: ESALQ, 1978. |
Páginas: |
29 p. |
Idioma: |
Português |
Notas: |
Não publicado. |
Conteúdo: |
A cebola esta entre as hortaliças mais cultivadas no Brasil e no mundo, ocupa 2 lugar em importância econômica, perdendo no Brasil somente para o tomate. Há produção e cultivo em todo o mundo. |
Palavras-Chave: |
Cultivo; Onion. |
Thesagro: |
Cebola. |
Categoria do assunto: |
A Sistemas de Cultivo |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/175822/1/31936.pdf
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Marc: |
LEADER 00555nam a2200169 a 4500 001 1156024 005 2019-08-22 008 1978 bl uuuu u0uu1 u #d 100 1 $aARAÚJO, J. P. 245 $aCebola. 260 $aPiracicaba: ESALQ$c1978 300 $a29 p. 500 $aNão publicado. 520 $aA cebola esta entre as hortaliças mais cultivadas no Brasil e no mundo, ocupa 2 lugar em importância econômica, perdendo no Brasil somente para o tomate. Há produção e cultivo em todo o mundo. 650 $aCebola 653 $aCultivo 653 $aOnion
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