Seasonal contribution of understory vegetation to the reflectance of a boreal landscape at different spatial scales

Miina Rautiainen, Janne Heiskanen

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

The composition of understory vegetation plays a central role in satellite-based estimation of biophysical properties of the tree layer in managed boreal forests. In this letter, we assess the contribution of understory vegetation to the reflectance of a managed boreal forest area throughout a growing season both at stand and landscape levels. We use a time series of SPOT and Hyperion, and MODIS satellite images, and a concurrent set of ground reference. Our results show that the contribution of understory to stand or landscape reflectance depends on tree canopy gap fractions and understory reflectance spectra, and their seasonal development. The reflected signal from the understory vegetation can account for more than 40% of boreal forest reflectance at stand level and for 20% at landscape level.

Original languageEnglish
Article number6484882
Pages (from-to)923-927
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Volume10
Issue number4
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Remote sensing
  • vegetation mapping

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