Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10451/49424 |
Resumo: | 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 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. |
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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 forestsInformation 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.Copernicus PublicationsRepositório da Universidade de LisboaPisek, JanErb, AngelaKorhonen, LauriBiermann, TobiasCarrara, ArnaudCremonese, EdoardoCuntz, MatthiasFares, SilvanoGerosa, GiacomoGrünwald, ThomasHase, NiklasHeliasz, MichalIbrom, AndreasKnohl, AlexanderKobler, JohannesKruijt, BartLange, HolgerLeppänen, LeenaLimousin, Jean-MarcSerrano, Francisco Ramon LopezLoustau, DenisLukeš, PetrLundin, LarsMarzuoli, RiccardoMölder, MeelisMontagnani, LeonardoNeirynck, JohanPeichl, MatthiasRebmann, CorinnaRubio, EvaSantos-Reis, MargaridaSchaaf, CrystalSchmidt, MariusSimioni, GuillaumeSoudani, KamelVincke, Caroline2021-09-06T11:49:30Z2021-012021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10451/49424engPisek, 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-18-621-20211726-418910.5194/bg-18-621-2021info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T16:53:00Zoai:repositorio.ul.pt:10451/49424Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:00:58.378018Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
title |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
spellingShingle |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests Pisek, Jan |
title_short |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
title_full |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
title_fullStr |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
title_full_unstemmed |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
title_sort |
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests |
author |
Pisek, Jan |
author_facet |
Pisek, Jan Erb, Angela Korhonen, Lauri Biermann, Tobias Carrara, Arnaud Cremonese, Edoardo Cuntz, Matthias Fares, Silvano Gerosa, Giacomo Grünwald, Thomas Hase, Niklas Heliasz, Michal Ibrom, Andreas Knohl, Alexander Kobler, Johannes Kruijt, Bart Lange, Holger Leppänen, Leena Limousin, Jean-Marc Serrano, Francisco Ramon Lopez Loustau, Denis Lukeš, Petr Lundin, Lars Marzuoli, Riccardo Mölder, Meelis Montagnani, Leonardo Neirynck, Johan Peichl, Matthias Rebmann, Corinna Rubio, Eva Santos-Reis, Margarida Schaaf, Crystal Schmidt, Marius Simioni, Guillaume Soudani, Kamel Vincke, Caroline |
author_role |
author |
author2 |
Erb, Angela Korhonen, Lauri Biermann, Tobias Carrara, Arnaud Cremonese, Edoardo Cuntz, Matthias Fares, Silvano Gerosa, Giacomo Grünwald, Thomas Hase, Niklas Heliasz, Michal Ibrom, Andreas Knohl, Alexander Kobler, Johannes Kruijt, Bart Lange, Holger Leppänen, Leena Limousin, Jean-Marc Serrano, Francisco Ramon Lopez Loustau, Denis Lukeš, Petr Lundin, Lars Marzuoli, Riccardo Mölder, Meelis Montagnani, Leonardo Neirynck, Johan Peichl, Matthias Rebmann, Corinna Rubio, Eva Santos-Reis, Margarida Schaaf, Crystal Schmidt, Marius Simioni, Guillaume Soudani, Kamel Vincke, Caroline |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Pisek, Jan Erb, Angela Korhonen, Lauri Biermann, Tobias Carrara, Arnaud Cremonese, Edoardo Cuntz, Matthias Fares, Silvano Gerosa, Giacomo Grünwald, Thomas Hase, Niklas Heliasz, Michal Ibrom, Andreas Knohl, Alexander Kobler, Johannes Kruijt, Bart Lange, Holger Leppänen, Leena Limousin, Jean-Marc Serrano, Francisco Ramon Lopez Loustau, Denis Lukeš, Petr Lundin, Lars Marzuoli, Riccardo Mölder, Meelis Montagnani, Leonardo Neirynck, Johan Peichl, Matthias Rebmann, Corinna Rubio, Eva Santos-Reis, Margarida Schaaf, Crystal Schmidt, Marius Simioni, Guillaume Soudani, Kamel Vincke, Caroline |
description |
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 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. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09-06T11:49:30Z 2021-01 2021-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10451/49424 |
url |
http://hdl.handle.net/10451/49424 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Pisek, 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-18-621-2021 1726-4189 10.5194/bg-18-621-2021 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Copernicus Publications |
publisher.none.fl_str_mv |
Copernicus Publications |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799134557945987072 |