Small geographical variability observed in Norway spruce needle spectra across Europe

0559680 - ÚVGZ 2023 RIV FI eng J - Journal Article
Hovi, A. - Lukeš, Petr - Homolová, Lucie - Juola, J. - Rautiainen, M.
Small geographical variability observed in Norway spruce needle spectra across Europe.
Silva Fennica. Roč. 56, č. 2 (2022), č. článku 10683. ISSN 0037-5330. E-ISSN 2242-4075
R&D Projects: GA MŠMT(CZ) LM2018123
Institutional support: RVO:86652079
Keywords : albedo * land surface modeling * leaf optical properties * radiative transfer modeling * remote transmittance
OECD category: Plant sciences, botany
Impact factor: 1.8, year: 2022
Method of publishing: Open access
https://www.silvafennica.fi/article/10683

Foliage spectra form an important input to physically-based forest reflectance models. However, little is known about geographical variability of coniferous needle spectra. In this research note, we present an assessment of the geographical variability of Norway spruce (Picea abies (L.) H. Karst.) needle albedo, reflectance, and transmittance spectra across three study sites cover-ing latitudes of 49???62??N in Europe. All spectra were measured and processed using exactly the same methodology and parameters, which guarantees reliable conclusions about geographical variability. Small geographical variability in Norway spruce needle spectra was observed, when compared to variability observed between previous measurement campaigns (employing slightly varying measurement and processing parameters), or to variability between plant functional types (broadleaved vs. coniferous). Our results suggest that variability of needle spectra is not a major factor introducing geographical variability to forest reflectance. The results also highlight the importance of harmonizing measurement protocols when collecting needle spectral libraries. Furthermore, the data collected for this study can be useful in studies where accurate information on spectral differences between broadleaved and coniferous tree foliage is needed.
Permanent Link: https://hdl.handle.net/11104/0332885