Comparison of methods for measuring gap size distribution and canopy nonrandomness at Järvselja RAMI (RAdiation transfer Model Intercomparison) test sites

No abstract is available for this paper.

• Publication year

  2011

• Venue

  Agricultural and Forest Meteorology

• Publication date

  2011-03-15

• Fields of study

  Mathematics, Environmental Science

• Identifiers
  DOI 10.1016/J.AGRFORMET.2010.11.009
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Controls on gross production by a semiarid forest growing near its warm and dry ecotonal limit

  2013cited by this paper
• Database of optical and structural data for the validation of radiative transfer models

  2013cited by this paper
• Canopy gap fraction estimation from digital hemispherical images using sky radiance models and a linear conversion method

  2010cited by this paper
• Improving Clumping and LAI Algorithms Based on Multiangle Airborne Imagery and Ground Measurements

  2010cited by this paper
• On the correct estimation of effective leaf area index: does it reveal information on clumping effects?

  2010influential reference
• Sampling gap fraction and size for estimating leaf area and clumping indices from hemispherical photographs

  2010cited by this paper
• How to quantify tree leaf area index in an open savanna ecosystem: A multi-instrument and multi-model approach

  2010influential reference
• Expanding global mapping of the foliage clumping index with multi-angular POLDER three measurements: Evaluation and topographic compensation

  2010cited by this paper
• Automated Analysis of in Situ Canopy Images for the Estimation of Forest Canopy Cover

  2009cited by this paper
• The potential of optical high resolution data for the assessment of leaf area index in East African rainforest ecosystems

  2009cited by this paper
• The computation of foliage clumping index using hemispherical photography

  2009influential reference
• Optimal geometric configuration and algorithms for LAI indirect estimates under row canopies: The case of vineyards

  2009influential reference
• A dataset for the validation of reflectance models

  2009cited by this paper
• Intercomparison and sensitivity analysis of Leaf Area Index retrievals from LAI-2000, AccuPAR, and digital hemispherical photography over croplands

  2008cited by this paper
• Estimation of leaf area and clumping indexes of crops with hemispherical photographs

  2008cited by this paper
• Comparison of leaf angle distribution functions: Effects on extinction coefficient and fraction of sunlit foliage

  2007cited by this paper
• Third Radiation Transfer Model Intercomparison (RAMI) exercise: Documenting progress in canopy reflectance models

  2007cited by this paper
• Estimation of leaf area index in eucalypt forest using digital photography

  2007influential reference
• Effect of aggregating spatial parameters on modelling forest carbon and water fluxes

  2006cited by this paper
• Methodology comparison for canopy structure parameters extraction from digital hemispherical photography in boreal forests

  2005influential reference
• Global mapping of foliage clumping index using multi-angular satellite data

  2005influential reference
• Radiative transfer and carbon assimilation in relation to canopy architecture, foliage area distribution and clumping in a mature temperate rainforest canopy in New Zealand

  2005cited by this paper
• Comparison and sensitivity analysis of instruments and radiometric methods for LAI estimation: assessments from a boreal forest site

  2004cited by this paper
• Improved algorithm for estimating canopy indices from gap fraction data in forest canopies

  2004cited by this paper
• Measurement and modelling of the vertical distribution of sunflecks, penumbra and umbra in willow coppice

  2004cited by this paper
• Integrating clumping effects in forest canopy structure: an assessment through hemispherical photographs

  2003influential reference
• Review of methods for in situ leaf area index ( LAI ) determination Part II . Estimation of LAI , errors and sampling

  2003influential reference
• Ground-based measurements of leaf area index: a review of methods, instruments and current controversies.

  2003cited by this paper
• Retrieval of vegetation clumping index using hot spot signatures measured by POLDER instrument

  2002cited by this paper
• Correction to the plant canopy gap-size analysis theory used by the Tracing Radiation and Architecture of Canopies instrument.

  2002influential reference
• Estimation of leaf area index in open-canopy ponderosa pine forests at different successional stages and management regimes in Oregon

  2001cited by this paper
• A practical scheme for correcting multiple scattering effects on optical LAI measurements

  2001cited by this paper
• Radiation transfer model intercomparison (RAMI) exercise

  2001cited by this paper
• Leaf area index estimates obtained for clumped canopies using hemispherical photography

  1999influential reference
• Inversion of gap frequency data in forest stands

  1999influential reference
• Characterization of radiation regimes in nonrandom forest canopies: theory, measurements, and a simplified modeling approach.

  1999influential reference
• Leaf area index of boreal forests: theory, techniques, and measurements

  1997cited by this paper
• Characterizing canopy nonrandomness with a multiband vegetation imager (MVI)

  1997influential reference
• Optically-based methods for measuring seasonal variation of leaf area index in boreal conifer stands

  1996influential reference
• Quantifying the effect of canopy architecture on optical measurements of leaf area index using two gap size analysis methods

  1995influential reference
• Plant canopy gap-size analysis theory for improving optical measurements of leaf-area index.

  1995influential reference
• Measuring leaf area index in a sparse eucalypt forest: a comparison of estimates from direct measurement, hemispherical photography, sunlight transmittance and allometric regression

  1995cited by this paper
• A comparison of direct and indirect methods for measuring leaf and surface areas of individual bushes

  1995cited by this paper
• Performance of the LAI-2000 plant canopy analyzer in estimating leaf area index of some Scots pine stands.

  1994cited by this paper
• A comparison of optical and direct methods for estimating foliage surface area index in forests

  1994cited by this paper
• Crop Structure and Light Microclimate: Characterization and Applications

  1993cited by this paper
• Influence of Shoot Structure on the Photosynthesis of Sitka Spruce (Picea sitchensis)

  1993cited by this paper
• Foliage area and architecture of plant canopies from sunfleck size distributions

  1992cited by this paper
• Measuring leaf area index of plant canopies with branch architecture

  1991cited by this paper
• Characteristics of shortwave and longwave irradiances under a Douglas-fir forest stand

  1991influential reference
• The Ratio of Shoot Silhouette Area to Total Needle Area in Scots Pine

  1988cited by this paper
• Estimation of leaf area index from transmission of direct sunlight in discontinuous canopies

  1986influential reference
• Photosynthesis of a scots pine shoot: simulation of the irradiance distribution and photosynthesis of a shoot in different radiation fields

  1985cited by this paper
• Simple Beta Distribution Representation of Leaf Orientation in Vegetation Canopies1

  1984influential reference
• Photosynthesis of a Scots pine shoot: The effect of shoot inclination on the photosynthetic response of a shoot subjected to direct radiation

  1983cited by this paper
• The Radiation Regime and Architecture of Plant Stands.

  1983cited by this paper
• The radiation regime and architecture of plant stands

  1981cited by this paper
• A critical review of light models for estimating the shortwave radiation regime of plant canopies

  1974cited by this paper
• A Sunfleck Theory for Plant Canopies I. Lengths of Sunlit Segments along a Transect1

  1971cited by this paper
• A theoretical analysis of the frequency of gaps in plant stands

  1971cited by this paper
• Stand Structure and Light Penetration. III. Sunlit Foliage Area

  1967cited by this paper
• Photosynthesis of leaf canopies

  1965cited by this paper
• Runs of One Species with Respect to Another in Transects through Plant Populations

  1962cited by this paper
• INCLINED POINT QUADRATS

  1960cited by this paper

• Pulse fragmentation-induced uncertainty in forest LAI mapping using UAV LiDAR

  2026cites this paper
• Research Progress on Field Measurement and Remote Sensing Inversion of Forest Leaf Area Index

  2026cites this paper
• Clumping index estimation with 30°-tilted cameras in row crops: Evaluation of methods and segment size effects

  2025cites this paper
• Validation of the MODIS Clumping Index: A Case Study in Saihanba National Forest Park

  2025cites this paper
• Methodology comparison for correcting woody component effects in leaf area index calculations from digital cover images in broadleaf forests

  2025cites this paper
• Comparison of Canopy Clumping Index Measuring Methods and Analysis of Their Impact

  2023cites this paper
• DHP-Based Forest Lai Measurements for Meter-Scale Remote Sensing Validation

  2023cites this paper
• Evaluation of the Consistency of the Vegetation Clumping Index Retrieved from Updated MODIS BRDF Data

  2022cites this paper
• Estimating LAI for Cotton Using Multisource UAV Data and a Modified Universal Model

  2022cites this paper
• Correcting for the clumping effect in leaf area index calculations using one-dimensional fractal dimension

  2022cites this paper
• Developing a 3D clumping index model to improve optical measurement accuracy of crop leaf area index

  2022cites this paper
• Error Analysis of LAI Measurements with LAI-2000 Due to Discrete View Angular Range Angles for Continuous Canopies

  2021cites this paper
• Canopy clumping index (CI): A review of methods, characteristics, and applications

  2021cites this paper
• Exploring the Potential of DSCOVR EPIC Data to Retrieve Clumping Index in Australian Terrestrial Ecosystem Research Network Observing Sites

  2021cites this paper
• Suitability of the boreal ecosystem simulator (BEPS) model for estimating gross primary productivity in hemi-boreal upland pine forest

  2021cites this paper
• Vertical structure heterogeneity in broadleaf forests: Effects on light interception and canopy photosynthesis

  2021cites this paper
• Comparative Evaluation of Algorithms for Leaf Area Index Estimation from Digital Hemispherical Photography through Virtual Forests

  2021cites this paper
• Spatio-Temporal Characteristics and Driving Factors of the Foliage Clumping Index in the Sanjiang Plain from 2001 to 2015

  2021cites this paper
• Estimating Needle and Shoot Inclination Angle Distributions and Projection Functions in Five Larix principis-rupprechtii Plots via Leveled Digital Camera Photography

  2020cites this paper
• Path Length Correction for Improving Leaf Area Index Measurements Over Sloping Terrains: A Deep Analysis Through Computer Simulation

  2020cites this paper
• Research Online Research Online The fourth phase of the radiative transfermodel intercomparison (RAMI) The fourth phase of the radiative transfermodel intercomparison (RAMI) exercise: actual canopy scenarios and conformity testing exercise: actual canopy scenarios and conformity testing

  2020cites this paper
• Evaluating the impact of sampling schemes on leaf area index measurements from digital hemispherical photography in Larix principis-rupprechtii forest plots

  2020influential citation
• A radiative transfer model for solar induced fluorescence using spectral invariants theory

  2020cites this paper
• An Overview of Global Leaf Area Index (LAI): Methods, Products, Validation, and Applications

  2019cites this paper
• Review of indirect optical measurements of leaf area index: Recent advances, challenges, and perspectives

  2019cites this paper
• Performance of Four Optical Methods in Estimating Leaf Area Index at Elementary Sampling Unit of Larix principis-rupprechtii Forests

  2019influential citation
• A new method to estimate clumping index integrating gap fraction averaging with the analysis of gap size distribution

  2019influential citation
• How to better estimate leaf area index and leaf angle distribution from digital hemispherical photography? Switching to a binary nonlinear regression paradigm

  2019cites this paper
• Global White-Sky and Black-Sky FAPAR Retrieval Using the Energy Balance Residual Method: Algorithm and Validation

  2019cites this paper
• Estimating Crown Structure Parameters of Moso Bamboo: Leaf Area and Leaf Angle Distribution

  2019cites this paper
• An algorithm for the retrieval of the clumping index (CI) from the MODIS BRDF product using an adjusted version of the kernel-driven BRDF model

  2018cites this paper
• Relating foliage and crown projective cover in Australian tree stands

  2018cites this paper
• Evaluating Two Optical Methods of Woody-to-Total Area Ratio with Destructive Measurements at Five Larix gmelinii Rupr. Forest Plots in China

  2018cites this paper
• Estimation of the directional and whole apparent clumping index (ACI) from indirect optical measurements

  2018cites this paper
• Consistent forest leaf area index retrieval using ground and airborne data

  2018influential citation
• Estimation of Gap Fraction and Foliage Clumping in Forest Canopies

  2018cites this paper
• Comparison of Seven Inversion Models for Estimating Plant and Woody Area Indices of Leaf-on and Leaf-off Forest Canopy Using Explicit 3D Forest Scenes

  2018influential citation
• Influence of Snow on the Magnitude and Seasonal Variation of the Clumping Index Retrieved from MODIS BRDF Products

  2018cites this paper
• Estimating the beyond-shoot foliage clumping at two contrasting points in the growing season using a variety of field-based methods

  2017cites this paper
• Canopy Architectural Models in Support of Methods Using Hemispherical Photography

  2017cites this paper
• Measurement of Forest Structure with Hemispherical Photography

  2017cites this paper
• Validating canopy clumping retrieval methods using hemispherical photography in a simulated Eucalypt forest

  2017influential citation
• Indirect Measurement of Forest Leaf Area Index Using Path Length Distribution Model and Multispectral Canopy Imager

  2016cites this paper
• Scale Effect in Indirect Measurement of Leaf Area Index

  2016cites this paper
• Estimating the clumping index at two contrasting points in the growing season using a variety of field-based methods

  2016cites this paper
• Estimation of canopy clumping index from MISR and MODIS sensors using the normalized difference hotspot and darkspot (NDHD) method: The influence of BRDF models and solar zenith angle

  2016cites this paper
• Inter- and intra-annual variations of clumping index derived from the MODIS BRDF product

  2016cites this paper
• Influence of woody tissue and leaf clumping on vertically resolved leaf area index and angular gap probability estimates.

  2015cites this paper
• Estimation of leaf area index and the fraction of absorbed photosynthetically active radiation in a boreal forest

  2015cites this paper
• Estimation of Canopy and Woody Components Clumping Indices at Three Mature Picea crassifolia Forest Stands

  2015cites this paper
• The fourth phase of the radiative transfer model intercomparison (RAMI) exercise: Actual canopy scenarios and conformity testing

  2015cites this paper
• An improved theoretical model of canopy gap probability for Leaf Area Index estimation in woody ecosystems

  2015cites this paper
• Extracting Leaf Area Index by Sunlit Foliage Component from Downward-Looking Digital Photography under Clear-Sky Conditions

  2015cites this paper
• Intercomparison of clumping index estimates from POLDER, MODIS, and MISR satellite data over reference sites

  2015cites this paper
• In-situ Leaf Area Index estimate uncertainty in forests: supporting Earth Observation product calibration and validation

  2015influential citation
• Development of ecosystems under human activity in the North-East Estonian industrial region: forests on post-mining sites and bogs

  2015cites this paper
• A note on suitable viewing configuration for retrieval of forest understory reflectance from multi-angle remote sensing data

  2015cites this paper
• A note on estimating canopy cover from digital cover and hemispherical photography

  2015cites this paper
• fourth phase of the radiative transfer model intercomparison (RAMI) exercise

  2015cites this paper
• The fourth phase of the radiative transfer model intercomparison (RAMI) exercise: Actual canopy scenarios and conformity testing

  2015cites this paper
• Estimation of Canopy Cover, Gap Fraction and Leaf Area Index with Airborne Laser Scanning

  2014cites this paper
• Hemispherical photography simulations with an architectural model to assess retrieval of leaf area index

  2014influential citation
• Indirect measurement of leaf area index on the basis of path length distribution

  2014cites this paper
• Hemispherical photography simulations with an architectural model to assess retrieval of leaf area index

  2014cites this paper
• Effects of canopy architectural parameterizations on the modeling of radiative transfer mechanism

  2013cites this paper
• Is the spherical leaf inclination angle distribution a valid assumption for temperate and boreal broadleaf tree species

  2013cites this paper
• Remote Sensing of Leaf Area Index and Clumping Index

  2013cites this paper
• Restoration of above canopy reference hemispherical image from below canopy measurements for plant area index estimation in forests/ Metsa võrastiku läbipaistvuse mõõtmine digitaalsete poolsfäärikaamerate abil

  2013cites this paper
• Retrieving vegetation clumping index from Multi-angle Imaging SpectroRadiometer (MISR) data at 275 m resolution

  2013cites this paper
• A note on the height variation of foliage clumping: comparison with remote sensing retrievals

  2013cites this paper
• Revisiting the vegetation hot spot modeling: Case of Poisson/Binomial leaf distributions

  2013cites this paper
• Global clumping index map derived from the MODIS BRDF product

  2012cites this paper
• Seasonal dynamics in leaf area index in three typical temperate montane forests of China: a comparison of multi-observation methods: Seasonal dynamics in leaf area index in three typical temperate montane forests of China: a comparison of multi-observation methods

  2012cites this paper
• Estimating leaf inclination and G-function from leveled digital camera photography in broadleaf canopies

  2011cites this paper
• Estimation of vegetation clumping index using MODIS BRDF data

  2011cites this paper
• Simulation of statistical characteristics of gap distribution in forest stands

  2011cites this paper
• Global clumping index map derived from modis BRDF products

  2011cites this paper
• Sampling gap fraction and size for estimating leaf area and clumping indices from hemispherical photographs

  2010cites this paper
• The fourth phase of the radiative transfer model intercomparison ( RAMI ) exercise

  year unknowncites this paper