Title:	The use of MODIS images to quantify the energy balance in different agroecosystems in Brazil.
Authors:	TEIXEIRA, A. H. de C. LEIVAS, J. F. RONQUIM, C. C. SILVA, G. B. S. da
Affiliation:	ANTONIO HERIBERTO DE C TEIXEIRA, CPATC; JANICE FREITAS LEIVAS, CNPM; CARLOS CESAR RONQUIM, CNPM; GUSTAVO BAYMA SIQUEIRA DA SILVA, CNPMA.
Date Issued:	2018
Citation:	In: RUSTAMOV, R. B. (Ed.). Multi-purposeful application of geospatial data. London: IntechOpen, 2018. cap. 6.
Pages:	p. 105-121.
Description:	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.
NAL Thesaurus:	Energy balance Agroecosystems Land use change Soil heating Digital images
Keywords:	Latent heat flux Sensible heat flux MODIS SAFER Simple Algorithm for Evapotranspiration Retrieving
Type of Material:	Parte de livro
Access:	openAccess
Appears in Collections:	Capítulo em livro científico (CNPMA)