Journal
REMOTE SENSING OF ENVIRONMENT
Volume 158, Issue -, Pages 362-375Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.rse.2014.10.019
Keywords
Thermal infrared; Land surface temperature; Directional anisotropy; SCOPE; Thermal remote-sensing
Funding
- 'Centre National d'Etudes Spatiales' (CNES) through the TOSCA (Terre, Ocean, Surfaces Continentales, Atmosphere) group
- 'Institut National de la Recherche Agronomique' (INRA)
- Department of 'Environnement et Agronomie'
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This study assesses the performance of the SCOPE model (Van der Tol et al., 2009) to reproduce directional anisotropy of remote sensing thermal infrared measurements. A calibration/validation exercise over two datasets (winter wheat and young pine stand) on energy balance fluxes is presented. Surface sensible and latent heat fluxes are correctly simulated (with RMSE in the range of 30-50 W.m(-2)) together with directional temperatures in 4 different viewing geometries (RMSE < 1.4 K) for both canopies. The sensitivity of the model to two critical but uncertain parameters, the maximum carboxylation capacity V-cmo, and a stomatal parameter lambda (the marginal water cost of carbon assimilation) is discussed; it is shown that anisotropy displays limited sensitivity to both parameters for the experimental conditions met over a well-watered wheat field. The ability of SCOPE to simulate anisotropy is finally illustrated by a qualitative comparison against experimental measurements obtained over a mature pine stand using an airborne TIR camera. SCOPE-simulated TIR directional anisotropy appears to be consistent with the experimental data. (C) 2014 Elsevier Inc. All rights reserved.
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