Spectral reflectance of multispecies herbaceous and moss canopies in the boreal forest understory and open field

Lea Hallik, Olevi Kull, Tiit Nilson, Josep Peñuelas

    Research output: Contribution to journalArticleResearchpeer-review

    14 Citations (Scopus)

    Abstract

    The reflectance signal from the forest tree canopy is influenced by the optical properties of the background formed by understory vegetation. Our study shows that the herb-moss layer in the forest tends to be brighter in the visible wavelength when the canopy above is more closed because of the specific properties of plants grown in low light. When leaf-area-based chlorophyll content falls below approximately 150 mg·m–2, reflectance in the red region of the spectrum increases compared with that of the background. The best descriptors of the herb-moss layer for deriving optical parameters are herb layer dry mass for the visible wavelength range and total aboveground water mass for near-infrared (NIR) reflectance. In addition, chlorophyll content per leaf area considerably improves the red reflectance estimate. © 2009 Canadian Aeronautics and Space Institute.
    Original languageEnglish
    Pages (from-to)474-485
    JournalCanadian Journal of Remote Sensing
    Volume35
    Issue number5
    DOIs
    Publication statusPublished - 1 Oct 2009

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