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  • Pisek, JanUniversity of Tartu (author)

Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-01-27
  • Copernicus GmbH,2021
  • 15 s.

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:c1133034-8070-4994-95f7-849a7266b8d2
  • https://lup.lub.lu.se/record/c1133034-8070-4994-95f7-849a7266b8d2URI
  • https://doi.org/10.5194/bg-18-621-2021DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Information about forest background reflectance is needed for accurate biophysical parameter retrieval from forest canopies (overstory) with remote sensing. Separating under- and overstory signals would enable more accurate modeling of forest carbon and energy fluxes. We retrieved values of the normalized difference vegetation index (NDVI) of the forest understory with the multi-angular Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF)/albedo data (gridded 500 m daily Collection 6 product), using a method originally developed for boreal forests. The forest floor background reflectance estimates from the MODIS data were compared with in situ understory reflectance measurements carried out at an extensive set of forest ecosystem experimental sites across Europe. The reflectance estimates from MODIS data were, hence, tested across diverse forest conditions and phenological phases during the growing season to examine their applicability for ecosystems other than boreal forests. Here we report that the method can deliver good retrievals, especially over different forest types with open canopies (low foliage cover). The performance of the method was found to be limited over forests with closed canopies (high foliage cover), where the signal from understory becomes too attenuated. The spatial heterogeneity of individual field sites and the limitations and documented quality of the MODIS BRDF product are shown to be important for the correct assessment and validation of the retrievals obtained with remote sensing.

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  • Erb, AngelaUniversity of Massachusetts (author)
  • Korhonen, LauriUniversity of Eastern Finland (author)
  • Biermann, TobiasLund University,Lunds universitet,ICOS Sweden,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)cec-tab (author)
  • Carrara, ArnaudFundacion Centro de Estudios Ambientales del Mediterraneo (CEAM) (author)
  • Cremonese, EdoardoEnvironmental Protection Agency of Aosta Valley (author)
  • Cuntz, MatthiasUniversity of Lorraine (author)
  • Fares, SilvanoCNR: National Research Council of Italy (author)
  • Gerosa, GiacomoCatholic University of the Sacred Heart, Brescia (author)
  • Grünwald, ThomasDresden University of Technology (author)
  • Hase, NiklasHelmholtz Centre for Environmental Research (UFZ) (author)
  • Heliasz, MichalLund University,Lunds universitet,ICOS Sweden,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)nate-mhz (author)
  • Ibrom, AndreasTechnical University of Denmark (author)
  • Knohl, AlexanderUniversity of Göttingen (author)
  • Kobler, JohannesAustrian Federal Environmental Agency (author)
  • Kruijt, BartWageningen University (author)
  • Lange, HolgerNorwegian Institute of Bioeconomy Research (Nibio) (author)
  • Leppänen, LeenaFinnish Meteorological Institute (author)
  • Limousin, Jean-MarcPaul Valéry University of Montpellier,University of Montpellier (author)
  • Ramon Lopez Serrano, FranciscoUniversity of Castilla La Mancha (author)
  • Loustau, DenisInstitut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) (author)
  • Lukeš, PetrGlobal Change Research Centre of the Czech Academy of Sciences (author)
  • Lundin, LarsSwedish University of Agricultural Sciences (author)
  • Marzuoli, RiccardoCatholic University of the Sacred Heart, Brescia (author)
  • Mölder, MeelisLund University,Lunds universitet,ICOS Sweden,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science(Swepub:lu)ngeo-mmo (author)
  • Montagnani, LeonardoForest Services, Autonomous Province of Bolzano,Free University of Bozen-Bolzano (author)
  • Neirynck, JohanResearch Institute for Nature and Forest (author)
  • Peichl, MatthiasSwedish University of Agricultural Sciences (author)
  • Rebmann, CorinnaHelmholtz Centre for Environmental Research (UFZ) (author)
  • Rubio, EvaUniversity of Castilla La Mancha (author)
  • Santos-Reis, MargaridaUniversity of Lisbon (author)
  • Schaaf, CrystalUniversity of Massachusetts (author)
  • Schmidt, MariusJülich Research Centre (author)
  • Simioni, GuillaumeInstitut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE) (author)
  • Soudani, KamelUniversity of Paris-Saclay,Agro ParisTech (author)
  • Vincke, CarolineCatholic University of Louvain (author)
  • University of TartuUniversity of Massachusetts (creator_code:org_t)

Related titles

  • In:Biogeosciences: Copernicus GmbH18:2, s. 621-6351726-41701726-4189

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