Data/hora: 23/06/2024 03:58:23

Biblioteca(s): | Embrapa Semiárido.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | B - 1
Data corrente: | 02/03/2017
Data da última atualização: | 24/04/2017
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
Registro original: | Embrapa Semiárido (CPATSA)
Exemplares: | CPATSA - (56431-1) - UPC - AP - DD -  -  -  - DIS