Upscaling seasonal phenological course of leaf dorsiventral reflectance in radiative transfer model

Leaf Age Matters in Remote Sensing: Taking Ground Truth for Spectroscopic Studies in Hemiboreal Deciduous Trees with Continuous Leaf Formation

“…After bud burst originating from proleptically formed buds, leaf anatomical and biophysical traits gradually change to promote photosynthetic activity. Leaf thickness increases remarkably at the beginning of the season [26], remains constant during the mid-season [24,26] and then decreases during leaf senescence [21]. Photosynthetic pigments follow a similar trend as leaf structural traits during the growing season: their content increases in juvenile leaves, reaches a maximum in mature leaves in the middle of leaf lifespan [27], and then decreases during senescence [28][29][30].…”

“…Photosynthetic pigments follow a similar trend as leaf structural traits during the growing season: their content increases in juvenile leaves, reaches a maximum in mature leaves in the middle of leaf lifespan [27], and then decreases during senescence [28][29][30]. Just as leaf traits change within a vegetative season, optical properties are dynamic over time in temperate deciduous trees [24,31]. Dillen et al [32] observed that leaf foliar reflectance provided a good indicator of leaf photosynthesis and nitrogen content from early bud break to leaf fall in Quercus rubra L. and Betula papyrifera Marsh.…”

“…Tree phenology and leaf ontogenesis in deciduous trees are closely related to meteorological conditions during a particular vegetative season [24,25]. After bud burst originating from proleptically formed buds, leaf anatomical and biophysical traits gradually change to promote photosynthetic activity.…”

Investigation on the effects of water loss on the solar spectrum reflectance and transmittance of Osmanthus fragrans leaves based on optical experiment and PROSPECT model

“…The solar spectrum reectance and transmittance characteristics of leaves are related to the absorption of pigments, water and dry matter, and the internal structure of the leaves. [1][2][3] Fig. 1 shows the reection and transmission spectra of a leaf.…”

“…The purpose of this study was to determine the effects of leaf water loss on spectral reectance and spectral transmittance in an Osmanthus fragrans leaf which is one of the most common evergreen tree species in southern China belonged to family Oleaceae. The objectives were to: (1) identify the spectral regions in which leaf reectance and leaf transmittance were affected by leaf water loss; (2) based on the PROSPECT model, reveal the changing trends of the leaf parameters with the decrease of leaf water content and clarify the reason for the changing trends of leaf spectral reectance and leaf spectral transmittance with the decreased leaf water content.…”