Data for 'Infrared radiative performance of urban trees: spatial distribution and interspecific comparison among ten species in the UK by in-situ spectroscopy'

How to cite this Dataset

Deng, Jie (2019): Data for 'Infrared radiative performance of urban trees: spatial distribution and interspecific comparison among ten species in the UK by in-situ spectroscopy'. University of Reading. Dataset. https://doi.org/10.17864/1947.231

Description

The datasets include 1) Leaf reflectance spectra of 9 common tree species (carpinus betulus, acer campestre, quercus robur, platanus x acerifolia, tilia platyphyllos, acer x freemanii, betula pendula, acer platanoides, aesculus hippocastanum) in the UK over the full wavelength range of 400 - 2500 nm. The leaf reflectance spectrum of each species was sampled from 5 to 10 individual trees with 10 leaves randomly collected from each tree. The collected leaves were measured promptly in the laboratory. Statistical mean leaf reflectance spectra and the spectral standard errors of the 9 tree species were estimated by the measuring samples within species. 2) Tree crown transflectance spectra samples of 10 tree species (sequoiadendron giganteum, carpinus betulus, acer campestre, quercus robur, platanus x acerifolia, tilia platyphyllos, acer x freemanii, betula pendula, acer platanoides, aesculus hippocastanum) in the frontal sunlit area of the trees, with a wavelength range of 350 - 1000 nm. The tree crown transflectance spectra were sampled in the sunlit side of trees by in-situ spectroscopy measurements using a vertical reference plane perpendicular to the transient solar azimuth direction. For each tree species, at least 5 trees were sampled at the crown level with visibly dense foliage (no obvious gaps in foliage and no concave crown contours). Statistical mean transflectance spectra of multiple tree species were determined in terms of intraspecific transflectance spectra in the frontal sunlit area, by converting transflectance spectra samples to the equivalent spectra at a solar altitude of 45° (benchmark condition). 3) Interspecific comparison of radiative performance levels across 10 species on sunny days determined in the benchmark conditions of 45° solar altitude. The statistical mean transflectance spectra and the standard mean errors of the 10 tree species implied interspecific difference of the radiative performance levels.

Resource Type:

Dataset

Creators:

Deng, Jie