Data/hora: 04/06/2024 13:36:36

Biblioteca(s): | Embrapa Meio Norte / UEP-Parnaíba.
Data corrente: | 26/02/1993
Data da última atualização: | 26/02/1993
Autoria: | YATES, S. R.; WARRICK, A. W.; MATTHIAS, A. D.; MUSIL, S.
Título: | Spatial variability of remotely sensed surface temperatures at field scale.
Ano de publicação: | 1988
Fonte/Imprenta: | Soil Science Society American Journal, v.52, p.40-45, 1988.
Idioma: | Inglês
Conteúdo: | Bare soil surface temperatures (BST) and crop canopy temperatures (CCT) were collected from a 1-ha field  in central Arizona using an infrared thermometer to determine whether they were spatially correlated. The measurements were taken from a two-dimensional random sampling pattern for selected dates and times to investigate the spatial and temporal distribution. Three measures of the correlation distance including two integral scales were calculated. Kriging, which produces the best linear unbiased estimator, was used to show the spatial pattern of the BST and CCT in the field on selected dates. the results indicate that the BST and CCT are spatially dependent random fumctions with integralscales that varied from 2 to l5 m for wet and dry conditions,respectively. The autocorrelation as the lagged distance approaches zero was greater than 0.4 except under wet soil conditions, where the autocorrelation for the CCT was found to be lower. The  results are important because, to date, no geostatistical study has shown that the CCTis a spatially dependent random function.
Palavras-Chave: | Escala integral; Geoestatistica; Integral scales; Semivariogram; Semivariograma.
Thesaurus Nal: | geostatistics; kriging.
Categoria do assunto: | --
Registro original: | Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)
Exemplares: | CPAMN-UEPP - (2148-1) - ADD - SP - -- -  -  - 1993.01047 - DIS