the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
A spectral-structural characterization of European temperate, hemiboreal and boreal forests
Abstract. Radiative transfer models of vegetation play a crucial role in the development of remote sensing methods by providing a theoretical framework to explain how electromagnetic radiation interacts with vegetation in different spectral regions. A limiting factor in model development has been the lack of sufficiently detailed ground reference data on both structural and spectral characteristics of forests needed for testing and validating the models. In this data description paper, we present a dataset on the structural and spectral properties of 58 stands in temperate, hemiboreal and boreal European forests. It is specifically designed for the development and validation of radiative transfer models for forests but can also be utilized in other remote sensing studies. It comprises detailed data on forest structure based on forest inventory measurements, terrestrial and airborne laser scanning, and digital hemispherical photography. Furthermore, the data include spectral properties of the same forests at multiple scales: reflectance spectra of tree leaves and needles (based on laboratory measurements), forest floor (based on in situ measurements) and entire stands (based on airborne measurements), as well as transmittance spectra of tree leaves and needles and entire tree canopies (based on laboratory and in situ measurements, respectively). We anticipate that these data will have wide use in testing and validating radiative transfer models for forests and in the development of remote sensing methods for vegetation. The data can be accessed at:
Hovi et al. 2024a, https://doi.org/10.23729/9a8d90cd-73e2-438d-9230-94e10e61adc9 (for laboratory and field data) and Hovi et al. 2024b, https://doi.org/10.23729/c6da63dd-f527-4ec9-8401-57c14f77d19f (for airborne data).
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RC1: 'Comment on essd-2024-154', Anonymous Referee #1, 23 Jun 2024
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The development of radiative transfer (RT) models requires comprehensive ground reference data on both the structural and spectral characteristics of forests. However, such kind of data are currently lacking. The dataset introduced in this paper consists detailed structural data from forest inventory measurements, terrestrial and airborne laser scanning, and digital hemispherical photography, and optical properties of tree leaves and needles, forest floor and entire stands. Such data would be valuable for RT modeling and biophysical validation studies. The paper is finely prepared and I recommend its publication in ESSD.
It would be nice if some field measurement pictures can be provided.
Fig. 7. The legend may be put in panel (a).
Citation: https://doi.org/10.5194/essd-2024-154-RC1
Data sets
A spectral-structural characterization of European temperate, hemiboreal and boreal forests: Laboratory and field data A. Hovi et al. https://doi.org/10.23729/9a8d90cd-73e2-438d-9230-94e10e61adc9
A spectral-structural characterization of European temperate, hemiboreal and boreal forests: Airborne data A. Hovi et al. https://doi.org/10.23729/c6da63dd-f527-4ec9-8401-57c14f77d19f
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