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).

中文翻译：

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欧洲温带、半寒带和寒带森林的光谱结构特征


摘要。植被辐射传输模型通过提供理论框架来解释电磁辐射如何与不同光谱区域的植被相互作用，在遥感方法的发展中发挥着至关重要的作用。模型开发的一个限制因素是缺乏测试和验证模型所需的关于森林结构和光谱特征的足够详细的地面参考数据。在这篇数据描述论文中，我们提供了关于温带、半寒带和寒带欧洲森林中 58 个林分的结构和光谱特性的数据集。它专为开发和验证森林辐射传输模型而设计，但也可用于其他遥感研究。它包括基于森林清查测量、地面和机载激光扫描以及数字半球摄影的森林结构详细数据。此外，数据还包括同一森林在多个尺度上的光谱特性：树叶和针叶的反射光谱（基于实验室测量）、森林地面（基于现场测量）和整个林分（基于机载测量）作为树叶和针叶以及整个树冠的透射光谱（分别基于实验室和现场测量）。我们预计这些数据将广泛用于测试和验证森林辐射传输模型以及开发植被遥感方法。数据可访问：Hovi 等人。 2024a，https://doi.org/10.23729/9a8d90cd-73e2-438d-9230-94e10e61adc9（实验室和现场数据）和 Hovi 等人。 2024b，https://doi.org/10.23729/c6da63dd-f527-4ec9-8401-57c14f77d19f（机载数据）。