Articles | Volume 18, issue 2 
            
                
                    
            
            
            https://doi.org/10.5194/bg-18-621-2021
                    © Author(s) 2021. This work is distributed under 
the Creative Commons Attribution 4.0 License.
                the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-621-2021
                    © Author(s) 2021. This work is distributed under 
the Creative Commons Attribution 4.0 License.
                the Creative Commons Attribution 4.0 License.
Retrieval and validation of forest background reflectivity from daily Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) data across European forests
                                            Tartu Observatory, University of Tartu, Tõravere, Tartumaa, Estonia
                                        
                                    Angela Erb
                                            School for the Environment, University of Massachusetts Boston, Boston, Massachusetts, USA
                                        
                                    Lauri Korhonen
                                            School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
                                        
                                    Tobias Biermann
                                            Lund University, Lund, Sweden
                                        
                                    Arnaud Carrara
                                            Fundación CEAM, Paterna, Valencia, Spain
                                        
                                    Edoardo Cremonese
                                            ARPA Valle d'Aosta, Saint-Christophe, Italy
                                        
                                    Matthias Cuntz
                                            Université de Lorraine, AgroParisTech, INRAE, UMR Silva, Nancy, France
                                        
                                    Silvano Fares
                                            CNR – National Research Council, Rome, Italy
                                        
                                    Giacomo Gerosa
                                            Department of Mathematics and Physics, Università Cattolica del Sacro Cuore, Brescia, Italy
                                        
                                    Thomas Grünwald
                                            Institute of Hydrology and Meteorology, Department of Hydro Sciences, Technische Universität Dresden, Dresden, Germany
                                        
                                    Niklas Hase
                                            Helmholtz Centre for Environmental Research – UFZ, Leipzig, Germany
                                        
                                    Michal Heliasz
                                            Lund University, Lund, Sweden
                                        
                                    Andreas Ibrom
                                            Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby, Denmark
                                        
                                    Alexander Knohl
                                            Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Göttingen, Germany
                                        
                                    Johannes Kobler
                                            Umweltbundesamt GmbH, Vienna, Austria
                                        
                                    Bart Kruijt
                                            Department of Environmental Sciences, Wageningen University & Research, Wageningen, the Netherlands
                                        
                                    Holger Lange
                                            Norwegian Institute of Bioeconomy Research, Ås, Norway
                                        
                                    Leena Leppänen
                                            Space and Earth Observation Centre, Finnish Meteorological Institute, Sodankylä, Finland
                                        
                                    Jean-Marc Limousin
                                            CEFE, Université Montpellier, CNRS, EPHE, IRD, Université Paul-Valéry Montpellier, Montpellier, France
                                        
                                    Francisco Ramon Lopez Serrano
                                            IER-ETSIAM, Universidad de Castilla-La Mancha, Albacete, Spain
                                        
                                    Denis Loustau
                                            INRAE, Bordeaux, France
                                        
                                    Petr Lukeš
                                            Global Change Research Institute, Academy of Sciences of the Czech
Republic, Brno, Czech Republic
                                        
                                    Lars Lundin
                                            Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden
                                        
                                    Riccardo Marzuoli
                                            Department of Mathematics and Physics, Università Cattolica del Sacro Cuore, Brescia, Italy
                                        
                                    Meelis Mölder
                                            Lund University, Lund, Sweden
                                        
                                    Leonardo Montagnani
                                            Faculty of Science and Technology, Free University of Bolzano, Bolzano, Italy
                                        
                                    
                                            Forest Services, Autonomous Province of Bolzano, Bolzano, Italy
                                        
                                    Johan Neirynck
                                            INBO, Geraardsbergen, Belgium
                                        
                                    Matthias Peichl
                                            Department of Forest Ecology and Management, Swedish University of
Agricultural Sciences, Umeå, Sweden
                                        
                                    Corinna Rebmann
                                            Helmholtz Centre for Environmental Research – UFZ, Leipzig, Germany
                                        
                                    Eva Rubio
                                            IER-ETSIAM, Universidad de Castilla-La Mancha, Albacete, Spain
                                        
                                    Margarida Santos-Reis
                                            cE3c – Centre for Ecology, Evolution and Environmental Changes,
Lisbon, Portugal
                                        
                                    Crystal Schaaf
                                            School for the Environment, University of Massachusetts Boston, Boston, Massachusetts, USA
                                        
                                    Marius Schmidt
                                            Forschungszentrum Jülich, Jülich, Germany
                                        
                                    Guillaume Simioni
                                            INRAE URFM, Avignon, France
                                        
                                    Kamel Soudani
                                            Université Paris-Saclay, CNRS, AgroParisTech, Ecologie, Systématique et Evolution, Orsay, France
                                        
                                    Caroline Vincke
                                            Faculty of Bioscience Engineering, Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
                                        
                                    Viewed
                        
                            Total article views: 4,633 (including HTML, PDF, and XML)
                        
                            
                                
                                
                            
                                
                                
                            
                        
                        
                            Cumulative views and downloads 
                                         (calculated since 04 Nov 2020)
                        
                        
                            
                                
                            
                    
        
                    
                    | HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 3,591 | 957 | 85 | 4,633 | 99 | 115 | 
- HTML: 3,591
- PDF: 957
- XML: 85
- Total: 4,633
- BibTeX: 99
- EndNote: 115
                        
                            Total article views: 3,813 (including HTML, PDF, and XML)
                        
                            
                                
                                
                            
                                
                                
                            
                        
                        
                            Cumulative views and downloads 
                                         (calculated since 27 Jan 2021)
                        
                        
                            
                                
                            
                    
                    
                    | HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 2,977 | 756 | 80 | 3,813 | 93 | 109 | 
- HTML: 2,977
- PDF: 756
- XML: 80
- Total: 3,813
- BibTeX: 93
- EndNote: 109
                        
                            Total article views: 820 (including HTML, PDF, and XML)
                        
                            
                                
                                
                            
                                
                                
                            
                        
                        
                            Cumulative views and downloads 
                                         (calculated since 04 Nov 2020)
                        
                        
                            
                                
                            
                    
        
                
            | HTML | XML | Total | BibTeX | EndNote | |
|---|---|---|---|---|---|
| 614 | 201 | 5 | 820 | 6 | 6 | 
- HTML: 614
- PDF: 201
- XML: 5
- Total: 820
- BibTeX: 6
- EndNote: 6
Viewed (geographical distribution)
                                Total article views: 4,633 (including HTML, PDF, and XML)
                                
                                Thereof 4,263 with geography defined
                                    and 370 with unknown origin. 
                            
        
                            
                                Total article views: 3,813 (including HTML, PDF, and XML)
                                
                                Thereof 3,612 with geography defined
                                    and 201 with unknown origin. 
                            
        
                            
                                Total article views: 820 (including HTML, PDF, and XML)
                                
                                Thereof 651 with geography defined
                                    and 169 with unknown origin. 
                            
                    | Country | # | Views | % | 
|---|
| Country | # | Views | % | 
|---|
| Country | # | Views | % | 
|---|
| Total: | 0 | 
| HTML: | 0 | 
| PDF: | 0 | 
| XML: | 0 | 
- 1
1
                            | Total: | 0 | 
| HTML: | 0 | 
| PDF: | 0 | 
| XML: | 0 | 
- 1
1
                            | Total: | 0 | 
| HTML: | 0 | 
| PDF: | 0 | 
| XML: | 0 | 
- 1
1
                            Cited
18 citations as recorded by crossref.
- A radar backscatter simulation of a forest canopy using 3D physical structures derived from LiDAR scanning V. Escobar-Ruiz et al. 10.1080/01431161.2024.2403626
- Soil respiration variation along an altitudinal gradient in the Italian Alps: Disentangling forest structure and temperature effects A. Badraghi et al. 10.1371/journal.pone.0247893
- Synergistic use of multi- and hyperspectral remote sensing data and airborne LiDAR to retrieve forest floor reflectance A. Hovi et al. 10.1016/j.rse.2023.113610
- Comparison of forest canopy gap fraction measurements from drone-based video frames, below-canopy hemispherical photography, and airborne laser scanning M. Lang et al. 10.1080/22797254.2025.2456629
- Relationships between understory spectra and fractional cover in northern European boreal forests P. Forsström et al. 10.1016/j.agrformet.2021.108604
- AVHRR NDVI Compositing Method Comparison and Generation of Multi-Decadal Time Series—A TIMELINE Thematic Processor S. Asam et al. 10.3390/rs15061631
- Influence of Varying Solar Zenith Angles on Land Surface Phenology Derived from Vegetation Indices: A Case Study in the Harvard Forest Y. Li et al. 10.3390/rs13204126
- Exploring the potential of SAR and terrestrial and airborne LiDAR in predicting forest floor spectral properties in temperate and boreal forests A. Mercier et al. 10.1016/j.rse.2024.114486
- Airborne Measurements of Surface Albedo and Leaf Area Index of Snow‐Covered Boreal Forest T. Manninen et al. 10.1029/2021JD035376
- A comparative study of long-time series of global-scale albedo products L. Mengyao et al. 10.1080/17538947.2023.2168773
- Earth-Observation-Based Monitoring of Forests in Germany—Recent Progress and Research Frontiers: A Review S. Holzwarth et al. 10.3390/rs15174234
- Hyperspectral indicators and characterization of glyphosate-induced stress in common lambsquarters (Chenopodium album L.) M. Soto et al. 10.1016/j.atech.2025.100890
- An in situ approach for validation of canopy chlorophyll fluorescence radiative transfer models using the full emission spectrum W. Liu et al. 10.1016/j.rse.2024.114490
- Dynamic parameterization of global land surface albedo components: Bare soil, non-photosynthetic vegetation, and photosynthetic vegetation A. Jia et al. 10.1016/j.rse.2025.114943
- Analysing far-red SIF directional anisotropy of three structurally contrasting forest canopies towards improved GPP estimation W. Liu et al. 10.1016/j.agrformet.2023.109531
- The dynamics of the carbon storage and fluxes in Scots pine (Pinus sylvestris) chronosequence V. Uri et al. 10.1016/j.scitotenv.2022.152973
- Identifying the main drivers of the seasonal decline of near-infrared reflectance of a temperate deciduous forest N. Hase et al. 10.1016/j.agrformet.2021.108746
- Links between light availability and spectral properties of forest floor in European forests P. Forsström et al. 10.1016/j.agrformet.2023.109481
18 citations as recorded by crossref.
- A radar backscatter simulation of a forest canopy using 3D physical structures derived from LiDAR scanning V. Escobar-Ruiz et al. 10.1080/01431161.2024.2403626
- Soil respiration variation along an altitudinal gradient in the Italian Alps: Disentangling forest structure and temperature effects A. Badraghi et al. 10.1371/journal.pone.0247893
- Synergistic use of multi- and hyperspectral remote sensing data and airborne LiDAR to retrieve forest floor reflectance A. Hovi et al. 10.1016/j.rse.2023.113610
- Comparison of forest canopy gap fraction measurements from drone-based video frames, below-canopy hemispherical photography, and airborne laser scanning M. Lang et al. 10.1080/22797254.2025.2456629
- Relationships between understory spectra and fractional cover in northern European boreal forests P. Forsström et al. 10.1016/j.agrformet.2021.108604
- AVHRR NDVI Compositing Method Comparison and Generation of Multi-Decadal Time Series—A TIMELINE Thematic Processor S. Asam et al. 10.3390/rs15061631
- Influence of Varying Solar Zenith Angles on Land Surface Phenology Derived from Vegetation Indices: A Case Study in the Harvard Forest Y. Li et al. 10.3390/rs13204126
- Exploring the potential of SAR and terrestrial and airborne LiDAR in predicting forest floor spectral properties in temperate and boreal forests A. Mercier et al. 10.1016/j.rse.2024.114486
- Airborne Measurements of Surface Albedo and Leaf Area Index of Snow‐Covered Boreal Forest T. Manninen et al. 10.1029/2021JD035376
- A comparative study of long-time series of global-scale albedo products L. Mengyao et al. 10.1080/17538947.2023.2168773
- Earth-Observation-Based Monitoring of Forests in Germany—Recent Progress and Research Frontiers: A Review S. Holzwarth et al. 10.3390/rs15174234
- Hyperspectral indicators and characterization of glyphosate-induced stress in common lambsquarters (Chenopodium album L.) M. Soto et al. 10.1016/j.atech.2025.100890
- An in situ approach for validation of canopy chlorophyll fluorescence radiative transfer models using the full emission spectrum W. Liu et al. 10.1016/j.rse.2024.114490
- Dynamic parameterization of global land surface albedo components: Bare soil, non-photosynthetic vegetation, and photosynthetic vegetation A. Jia et al. 10.1016/j.rse.2025.114943
- Analysing far-red SIF directional anisotropy of three structurally contrasting forest canopies towards improved GPP estimation W. Liu et al. 10.1016/j.agrformet.2023.109531
- The dynamics of the carbon storage and fluxes in Scots pine (Pinus sylvestris) chronosequence V. Uri et al. 10.1016/j.scitotenv.2022.152973
- Identifying the main drivers of the seasonal decline of near-infrared reflectance of a temperate deciduous forest N. Hase et al. 10.1016/j.agrformet.2021.108746
- Links between light availability and spectral properties of forest floor in European forests P. Forsström et al. 10.1016/j.agrformet.2023.109481
Latest update: 30 Oct 2025
Short summary
                    Understory vegetation is the most diverse, least understood component of forests worldwide. Understory communities are important drivers of overstory succession and nutrient cycling. Multi-angle remote sensing enables us to describe surface properties by means that are not possible when using mono-angle data. Evaluated over an extensive set of forest ecosystem experimental sites in Europe, our reported method can deliver good retrievals, especially over different forest types with open canopies.
                    Understory vegetation is the most diverse, least understood component of forests worldwide....
                    
                Altmetrics
                
                Final-revised paper
            
            
                    Preprint
                
                     
 
                             
                             
                     
                     
                    