Retrieval of seasonal dynamics of forest understory reflectance from semiarid to boreal forests using MODIS BRDF data

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2016-03
Major/Subject
Mcode
Degree programme
Language
en
Pages
855–863
Series
JOURNAL OF GEOPHYSICAL RESEARCH: BIOGEOSCIENCES, Volume 121, issue 3
Abstract
Spatial and temporal patterns of forest background (understory) reflectance are crucial for retrieving biophysical parameters of forest canopies (overstory) and subsequently for ecosystem modeling. In this communication, we retrieved seasonal courses of understory normalized difference vegetation index (NDVI) from multiangular Moderate Resolution Imaging Spectroradiometer bidirectional reflectance distribution function (MODIS BRDF)/albedo data. We compared satellite-based seasonal courses of understory NDVI to understory NDVI values measured in different types of forests distributed along a wide latitudinal gradient (65.12°N-31.35°N). Our results indicated that the retrieval method performs well particularly over open forests of different types. We also demonstrated the limitations of the method for closed canopies, where the understory signal retrieval is much attenuated.
Description
Keywords
MODIS BRDF, Multiangle remote sensing, NDVI, Understory
Other note
Citation
Pisek , J , Chen , J M , Kobayashi , H , Rautiainen , M , Schaepman , M E , Karnieli , A , Sprinstin , M , Ryu , Y , Nikopensius , M & Raabe , K 2016 , ' Retrieval of seasonal dynamics of forest understory reflectance from semiarid to boreal forests using MODIS BRDF data ' , JOURNAL OF GEOPHYSICAL RESEARCH: BIOGEOSCIENCES , vol. 121 , no. 3 , pp. 855–863 . https://doi.org/10.1002/2016JG003322