Results 11 to 20 of about 11,335 (270)

Inter- and intra-annual variations of clumping index derived from the MODIS BRDF product

International Journal of Applied Earth Observation and Geoinformation, 2016
Abstract Clumping index quantifies the level of foliage aggregation, relative to a random distribution, and is a key structural parameter of plant canopies and is widely used in ecological and meteorological models. In this study, the inter- and intra-annual variations in clumping index values, derived from the Moderate Resolution Imaging ...
Liming He, Jane Liu, Jing M Chen
exaly   +3 more sources

Evaluation of Clumping Effects on the Estimation of Global Terrestrial Evapotranspiration

Remote Sensing, 2021
In terrestrial ecosystems, leaves are aggregated into different spatial structures and their spatial distribution is non-random. Clumping index (CI) is a key canopy structural parameter, characterizing the extent to which leaf deviates from the random ...
Bin Chen, Xuehe Lu, Shaoqiang Wang, Jing M. Chen, Yang Liu, Hongliang Fang, Zhenhai Liu, Fei Jiang, Muhammad Altaf Arain, Jinghua Chen, Xiaobo Wang   +10 more
doaj   +3 more sources

Clumping Morphology Influences Virulence Uncoupled from Echinocandin Resistance in Candida glabrata

Microbiology Spectrum, 2022
Here, we report two paired sets of an index wild-type Candida glabrata bloodstream isolate and subsequent echinocandin-resistant FKS mutant. One paired set exhibited a higher proportion of clumping cells and was more virulent in the invertebrate host ...
Chenlin Hu, Gary Fong, Sebastian Wurster, Dimitrios P. Kontoyiannis, Nicholas D. Beyda   +4 more
doaj   +3 more sources

Variation of Clumping Index With Zenith Angle for Forest Canopies

IEEE Transactions on Geoscience and Remote Sensing, 2022
Canopy clumping index (CI) characterizes the extent of the nonrandom spatial distribution of foliage elements within a canopy and is critical for determining the radiative transfer, photosynthesis, and transpiration processes in the canopy. It is widely perceived that the CI increases with zenith angle ( θ ), because between-crown gaps decrease in size
Geng, Jun, Tu, Lili, Chen, Jing, Roujean, Jean-Louis, Yuan, Gang, Hu, Ronghai, Huang, Jianwei, Zhang, Chunju, Ye, Zhourun, Qu, Xiaochuan, Yu, Min, Zhu, Yongchao, Tian, Qingjiu   +12 more
openaire   +4 more sources

Developing a 3D clumping index model to improve optical measurement accuracy of crop leaf area index [PDF]

Field Crops Research, 2022
The clumping index reflects the state of leaf aggregation, which is an essential structural parameter for calculating the leaf area index (LAI). Most of the previous clumping index models are one-dimensional (1D) models, in which the input parameters are measured in a long truncated manner (i.e., one-dimensional measurement path, line data), so that is
Ma, Xu, Wang, Tiejun, Lu, Lei, Huang, Huaguo, Ding, Jianli, Zhang, Fei   +5 more
openaire   +3 more sources

Correcting Crown-Level Clumping Effect for Improving Leaf Area Index Retrieval From Large-Footprint LiDAR: A Study Based on the Simulated Waveform and GLAS Data [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The demand for leaf area index (LAI) retrieval from spaceborne full-waveform LiDAR increases due to its direct sampling of the three-dimensional forest structure at a near-global scale.
Hailan Jiang, Guangjian Yan, Yiyi Tong, Shiyu Cheng, Xuebo Yang, Ronghai Hu, Linyuan Li, Xihan Mu, Donghui Xie, Wuming Zhang, Guoqing Zhou, Felix Morsdorf   +11 more
doaj   +2 more sources

A BOX-COUNTING METHOD TO CHARACTERIZE DEGREES OF FOLIAGE CLUMPING USING AIRBORNE AND SIMULATED LIDAR DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Monitoring forest productivity and health is key to sustainable ecosystem management and informed decision making. A key parameter used in monitoring forest resources is the leaf area index (LAI), which is defined as the one-sided leaf area per unit ...
M. van Leeuwen, J. A. N. van Aardt, T. Kampe, K. Krause   +3 more
doaj   +2 more sources

Estimation of leaf area and clumping indexes of crops with hemispherical photographs [PDF]

Agricultural and Forest Meteorology, 2008
Among many indirect approaches to retrieve effective leaf area index (LAI), hemispherical photography is now widely used by the scientific community in forestry applications. A recent software (CAN_EYE) is used to estimate effective and true LAI from unidirectional gap fractions measured in crops.
Demarez, Valérie, Duthoit, Sylvie, Baret, Frédéric, Weiss, Marie, Dedieu, Gérard   +4 more
openaire   +5 more sources

Spatio-Temporal Characteristics and Driving Factors of the Foliage Clumping Index in the Sanjiang Plain from 2001 to 2015

Remote Sensing, 2021
The Sanjiang Plain is the largest agricultural reclamation area and the biggest marsh area in China. The regional vegetation coverage in this area is vital to local ecological systems, and vegetation growth is affected by natural and anthropogenic ...
Kehong Hu, Zhen Zhang, Hongliang Fang, Yijie Lu, Zhengnan Gu, Min Gao   +5 more
doaj   +2 more sources

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

Remote Sensing, 2018
The foliage Clumping Index (CI) is an important vegetation structure parameter that allows for the accurate separation of sunlit and shaded leaves in a canopy.
Yadong Dong, Ziti Jiao, Siyang Yin, Hu Zhang, Xiaoning Zhang, Lei Cui, Dandan He, Anxin Ding, Yaxuan Chang, Shengtian Yang   +9 more
doaj   +2 more sources