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A strong positive correlation between vegetation canopy bidirectional reflectance factor (BRF) in the near infrared (NIR) spectral region and foliar mass-based nitrogen concentration (%N) has been reported in some temperate and boreal forests. This relationship, if true, would indicate an additional role for nitrogen in the climate system via its influence(More)
3 The RAdiation transfer Model Intercomparison (RAMI) initiative benchmarks canopy 4 reflectance models under well-controlled experimental conditions. Launched for the first 5 time in 1999 this triennial community exercise encourages the systematic evaluation of 6 canopy reflectance models on a voluntary basis. The first phase of RAMI focused on doc-7(More)
This paper addresses tree crown envelope shape modeling from the perspective of optical passive remote sensing. The aims are 1) to review the specific requirements of crown shape models and ground measurement techniques in optical remote sensing, and 2) to present preliminary results from empirical, parametric crown shape and volume modeling of Scots pine(More)
3 The RAdiation transfer Model Intercomparison (RAMI) initiative benchmarks canopy 4 reflectance models under well-controlled experimental conditions. Launched for the first 5 time in 1999 this triennial community exercise encourages the systematic evaluation of 6 canopy reflectance models on a voluntary basis. The first phase of RAMI focused on doc7(More)