Relationships between understory spectra and fractional cover in northern European boreal forests
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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7
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Agricultural and Forest Meteorology, Volume 308-309
Abstract
Modern satellite and airborne optical images have increasingly higher resolutions and enable the study of all layers of forests, not just the forest canopy. To understand the contribution of different types of understory on the overall spectral reflectance signal, ground reference data are needed from different types of forests. In this paper, we present the analysis of spectral reflectance factors (350-2300 nm) and fractional covers of understory from 36 boreal forest stands. The data were collected during peak growing season in a southern boreal forest area in Finland. The study stands represent four different forest site fertility types. We used a spectrometer to measure understory spectra in nadir and vegetation quadrats to estimate fractional cover. We showed that the understory has specific spectral features related to the site fertility type and fractional cover. Our results suggest that remote sensing can be used to differentiate forest site fertility types and estimate understory green fractional cover in northern European boreal forests. The collected data are openly available in an open data repository.Description
| openaire: EC/H2020/771049/EU//FREEDLES Funding Information: We thank Aarne Hovi, Ville Ranta, and Daniel Schraik for collaboration. This work was supported by the Academy of Finland [BOREALITY, grant number 286390 ; and DIMEBO , grant number 3323004 ]; and by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [grant agreement No 771049 ]. The article reflects only the authors’ view and the Agency is not responsible for any use that may be made of the information it contains. Funding Information: We thank Aarne Hovi, Ville Ranta, and Daniel Schraik for collaboration. This work was supported by the Academy of Finland [BOREALITY, grant number 286390; and DIMEBO, grant number 3323004]; and by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [grant agreement No 771049]. The article reflects only the authors? view and the Agency is not responsible for any use that may be made of the information it contains. Publisher Copyright: © 2021
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Forsström, P R, Juola, J & Rautiainen, M 2021, 'Relationships between understory spectra and fractional cover in northern European boreal forests', Agricultural and Forest Meteorology, vol. 308-309, 108604. https://doi.org/10.1016/j.agrformet.2021.108604