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On the relationship between thermal emissivity and the normalized difference vegetation index for natural surfaces

International Journal of Remote Sensing · 1993 · Vol. 14(6) · pp. 1119–1131

A.A. van de Griend✉(University of Amsterdam)Manfred Owe

Abstract

Abstract The spatial variation of both the thermal emissivity (8–14/mu;m) and Normalized Difference Vegetation Index (NDVI) was measured for a series of natural surfaces within a savanna environment in Botswana. The measurements were performed with an emissivity-box and with a combined red and near-infrared radiometer, with spectral bands corresponding to NOAA/AVHRR. It was found that thermal emissivity was highly correlated with NDVI after logarithmic transformation, with a correlation coefficient of R = 0·94. This empirical relationship is of potential use for energy balance studies using thermal infrared remote sensing. The relationship was used in combination with AVHRR (GAC), AVHRR (LAC), and Landsat (TM) data to demonstrate and compare the spatial variability of various spatial scales.

Urban Heat Island Mitigation Remote Sensing in Agriculture Land Use and Ecosystem ServicesNormalized Difference Vegetation IndexEmissivityRemote sensingAdvanced very-high-resolution radiometerEnvironmental scienceVegetation (pathology)RadiometerRadiometryCorrelation coefficientSpatial variability

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