Data/hora: 05/06/2024 13:27:19

Biblioteca(s): | Embrapa Meio Ambiente; Embrapa Tabuleiros Costeiros; Embrapa Territorial.
Data corrente: | 01/06/2018
Data da última atualização: | 18/01/2019
Autoria: | TEIXEIRA, A. H. de C.; LEIVAS, J. F.; RONQUIM, C. C.; SILVA, G. B. S. da.
Afiliação: | ANTONIO HERIBERTO DE C TEIXEIRA, CPATC; JANICE FREITAS LEIVAS, CNPM; CARLOS CESAR RONQUIM, CNPM; GUSTAVO BAYMA SIQUEIRA DA SILVA, CNPMA.
Título: | The use of MODIS images to quantify the energy balance in different agroecosystems in Brazil.
Ano de publicação: | 2018
Fonte/Imprenta: | In: RUSTAMOV, R. B. (Ed.). Multi-purposeful application of geospatial data. London: IntechOpen, 2018. cap. 6.
Páginas: | p. 105-121.

Idioma:

Inglês
Português

Conteúdo: | Sugarcane (SC) is expanding over coffee (CO), while both crops have replaced the natural vegetation (NV) in the northeastern side of São Paulo (SP) state, Southeast Brazil. Under these dynamic land-use changes, geosciences are valuable tools for evaluating the largescale energy and mass exchanges between the vegetation and the lower atmosphere. For quantification of the energy balance components in these mixed agroecosystems, MODIS images were used throughout the Simple Algorithm for Evapotranspiration Retrieving (SAFER) algorithm, during the year 2015 in the main sugarcane- and coffee-growing regions of the state. Regarding, respectively, sugarcane, coffee, and natural vegetation, the fractions of the net radiation (Rn) used as latent heat flux (?E) were 0.68, 0.87, and 0.77, while the corresponding ones for the sensible heat (H) fluxes were 0.27, 0.07, and 0.16. Negative H values were noticed from April to July, because of heat advection raising ?E values above Rn, but they were more often in coffee than in sugarcane. It was concluded that sugarcane crop presented lower evapotranspiration rates, when compared with coffee, which could be an advantage under the actual water scarcity scenario. However, sugarcane replacing natural vegetation means environmental warming, while the land use changes promoted by coffee crop represented cooling conditions.
Palavras-Chave: | Agroecossistemas; Latent heat flux; MODIS; SAFER; Sensible heat flux; Simple Algorithm for Evapotranspiration Retrieving.
Thesagro: | Aclimatação; Balanço de Energia; Café; Cana de Açúcar; Clima; Risco Climático.
Thesaurus Nal: | Agroecosystems; Cane sugar; Coffea arabica var. arabica; Digital images; Energy; Energy balance; Evapotranspiration; Land use change; Soil heating.

Categoria do assunto:

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P Recursos Naturais, Ciências Ambientais e da Terra

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/190564/1/CL-SilvaGBS-Multi-purposefulApplicationOfGeospatialData-2018-cap6.pdf
Registro original: | Embrapa Meio Ambiente (CNPMA)

Exemplares:

CPATC - (25225-1) - UPC - PL - DD -  -  -  - DIS
CNPM - (4959-1) - UPC - PL - DD - 18/006 - CL - 2018.006 - DIS
CNPMA - (16330-1) - UPC - PL - DD -  -  -  - DIS