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

2021-01Artigo científico Desconhecido
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dc.contributor.authorPisek, Jan
dc.contributor.authorErb, Angela
dc.contributor.authorKorhonen, Lauri
dc.contributor.authorBiermann, Tobias
dc.contributor.authorCarrara, Arnaud
dc.contributor.authorCremonese, Edoardo
dc.contributor.authorCuntz, Matthias
dc.contributor.authorFares, Silvano
dc.contributor.authorGerosa, Giacomo
dc.contributor.authorGrünwald, Thomas
dc.contributor.authorHase, Niklas
dc.contributor.authorHeliasz, Michal
dc.contributor.authorIbrom, Andreas
dc.contributor.authorKnohl, Alexander
dc.contributor.authorKobler, Johannes
dc.contributor.authorKruijt, Bart
dc.contributor.authorLange, Holger
dc.contributor.authorLeppänen, Leena
dc.contributor.authorLimousin, Jean-Marc
dc.contributor.authorSerrano, Francisco Ramon Lopez
dc.contributor.authorLoustau, Denis
dc.contributor.authorLukeš, Petr
dc.contributor.authorLundin, Lars
dc.contributor.authorMarzuoli, Riccardo
dc.contributor.authorMölder, Meelis
dc.contributor.authorMontagnani, Leonardo
dc.contributor.authorNeirynck, Johan
dc.contributor.authorPeichl, Matthias
dc.contributor.authorRebmann, Corinna
dc.contributor.authorRubio, Eva
dc.contributor.authorSantos-Reis, Margarida
dc.contributor.authorSchaaf, Crystal
dc.contributor.authorSchmidt, Marius
dc.contributor.authorSimioni, Guillaume
dc.contributor.authorSoudani, Kamel
dc.contributor.authorVincke, Caroline
dc.date.accessioned2021-09-06T11:49:30Z
dc.date.available2021-09-06T11:49:30Z
dc.date.issued2021-01
dc.description.abstractInformation 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 500m 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPisek, J., Erb, A., Korhonen, L., Biermann, T., Carrara, A., Cremonese, E., … Vincke, C. (2021). Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests. Biogeosciences, 18(2), 621–635. https://doi.org/10.5194/bg-18-621-2021pt_PT
dc.identifier.doi10.5194/bg-18-621-2021pt_PT
dc.identifier.issn1726-4189
dc.identifier.urihttp://hdl.handle.net/10451/49424
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherCopernicus Publicationspt_PT
dc.relationEesti Teadusagentuur grant PUT1355pt_PT
dc.relationEesti Teadusagentuur grant Mobilitas Pluss MOBERC11pt_PT
dc.relationHorizon 2020 grant eLTER 654359pt_PT
dc.relationSwedish Research Council grant 2015-06020pt_PT
dc.relationNASA grant 80NSSC18K0642pt_PT
dc.relation.publisherversionhttps://bg.copernicus.org/articles/18/621/2021/pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titleRetrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forestspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage635pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage621pt_PT
oaire.citation.titleBiogeosciencespt_PT
oaire.citation.volume18pt_PT
person.familyNameSantos-Reis
person.givenNameMargarida
person.identifier.ciencia-id4911-7756-340F
person.identifier.orcid0000-0002-0337-963X
person.identifier.scopus-author-id6603189806
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7b16b1ea-769c-4c3c-a2f5-b10bf4077f06
relation.isAuthorOfPublication.latestForDiscovery7b16b1ea-769c-4c3c-a2f5-b10bf4077f06

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