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The Influence of Snow Cover on the Seasonal Variation of Global Clumping Index Products
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018The foliage Clumping Index (CI) quantifies the level of foliage grouping within a distinct canopy structure relative to a random distribution. It is a key structure parameter for the ecological, hydrological, and land surface models. In this study, we investigate the influence of snow cover on the seasonal variation of global CI products derived from ...
Yadong Dong +7 more
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Clumping Effects in Leaf Area Index Retrieval From Large-Footprint Full-Waveform LiDAR
IEEE Transactions on Geoscience and Remote Sensing, 2022Clumping effect denotes the nonrandomness of foliage. It deviates from the random distribution assumption of Beer’s law which is usually applied to leaf area index (LAI) retrieval from large-footprint full-waveform light detection and ranging (LiDAR).
Hailan Jiang +10 more
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Estimation of clumping index and LAI from Terrestrial LiDAR data
2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2016In this study, clumping index and effective leaf area index (LAI) are estimated from Terrestrial Laser Scanner (TLS) data. Integrating vertical and tilt scanning from Terrestrial laser scanner, accounting zenith angle and path length two factors, discrete directional canopy gap fraction could be calculated and effective LAI could be estimated from ...
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Estimation of vegetation clumping index using MODIS BRDF data
International Journal of Remote Sensing, 2011The foliage clumping index quantifies the degree of the deviation of leaf spatial distribution in the canopy from the random case. It is of comparable importance for ecological models as the leaf area index for quantifying radiation interception and distribution in plant canopies.
Jan Pisek, Jing Ming Chen, Tiit Nilson
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The relationship between vegetation clumping index angular distribution and canopy spatial pattern
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012Vegetation clumping index is required for canopy reflectance modeling and leaf area index (LAI) retrieval. Frequently used is the average clumping index. The angle effect is normalized in the definition of average clumping index. Clumping index angular distribution with different canopy spatial pattern and the same architectural features of single ...
Biao Cao +4 more
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Modeling Landsat Clumping Index Basing On MODIS and Field Data: A Machine Learning Approach
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019Clumping index (CI) is an important vegetation structure parameter in the estimation of leaf area index (LAI) and the modeling of ecological and meteorological process. With the development of surface process modeling and remote sensing technology, high resolution CI product is urgently needed but no appropriate high resolution multi-angle reflectance ...
Siyang Yin +8 more
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Leaf area index estimates obtained for clumped canopies using hemispherical photography
Agricultural and Forest Meteorology, 1999A method has been developed to improve estimates of leaf area index determined from hemispherical images of plant canopies. The approach used has been to modify existing techniques for analysis of gap fraction at a range of zenith angles. Conventional analytical techniques determine the gap fraction for a number of concentric annuli and then calculate ...
P.R van Gardingen +4 more
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Retrieving forest canopy clumping index using terrestrial laser scanning data
Remote Sensing of Environment, 2018Abstract Quantitatively characterizing the non-random spatial distributions of foliage elements including coniferous needles is critical to map the radiation regime and retrieve the biophysical parameters of a given forest canopy from three-dimensional (3-D) perspective.
Lixia Ma +5 more
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[Foliage clumping index of main vegetation types in Daxing'an Mountains, Northeast China].
Ying yong sheng tai xue bao = The journal of applied ecology, 2018The foliage clumping index quantifies the cluster degree of the leaf spatial distribution under random canopy. It is of comparable importance for establishment of ecological models. MODIS BRDF model parameter products (MCD43A1 data) and land cover types (MCD12Q1 data) were used in this study to simulate the reflectivity of the hot spots and dark spots,
Ting, Huang +3 more
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Influences of semiellipsoid-shaped crown on gap fraction and clumping index
National Remote Sensing Bulletin, 2021WANG Shaoteng +3 more
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