Results 11 to 20 of about 5,055 (231)

Simultaneous assimilation of satellite and eddy covariance data for improving terrestrial water and carbon simulations at a semi-arid woodland site in Botswana [PDF]

Biogeosciences, 2013
Terrestrial productivity in semi-arid woodlands is strongly susceptible to changes in precipitation, and semi-arid woodlands constitute an important element of the global water and carbon cycles.
T. Kato, W. Knorr, M. Scholze, E. Veenendaal, T. Kaminski, J. Kattge, N. Gobron   +6 more
doaj   +3 more sources

Improvement of FAPAR Estimation Under the Presence of Non-Green Vegetation Considering Fractional Vegetation Coverage

Remote Sensing
The homogeneous turbid medium assumption inherent to the Beer-Lambert’s law can lead to a reduction in the shading effect between leaves when non-green vegetation canopies are present, resulting in an overestimation of the fraction of absorbed ...
Rui Li, Baolin Li, Yecheng Yuan, Wei Liu, Jie Zhu, Jiali Qi, Haijiang Liu, Guangwen Ma, Yuhao Jiang, Ying Li, Qiuyuan Tan   +10 more
doaj   +2 more sources

Can We Use Satellite-Based FAPAR to Detect Drought?

Sensors, 2019
Drought in Australia has widespread impacts on agriculture and ecosystems. Satellite-based Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) has great potential to monitor and assess drought impacts on vegetation greenness and health ...
Jian Peng, Jan-Peter Muller, Simon Blessing, Ralf Giering, Olaf Danne, Nadine Gobron, Said Kharbouche, Ralf Ludwig, Ben Müller, Guoyong Leng, Qinglong You, Zheng Duan, Simon Dadson   +12 more
doaj   +4 more sources

High spatiotemporal resolution vegetation FAPAR estimation from Sentinel-2 based on the spectral invariant theory

Science of Remote Sensing
The fraction of absorbed photosynthetically active radiation (FAPAR) is a key input parameter that drives photosynthesis in terrestrial ecosystem models.
Yunzhu Tao, Naijie Peng, Wenjie Fan, Xihan Mu, Husi Letu, Run Ma, Siqi Yang, Qunchao He, Dechao Zhai, Huangzhong Ren   +9 more
doaj   +2 more sources

Assessment of Satellite-Derived FAPAR Products With Different Spatial Resolutions for Gross Primary Productivity Estimation

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Accurate estimation of gross primary productivity (GPP) is crucial for understanding terrestrial carbon cycles and assessing ecosystem health. Light use efficiency (LUE) models, which are widely used for the generation of regional or global GPP products,
Xiyu Zhang, Huaan Jin, Wei Zhao, Gaofei Yin, Xinyao Xie, Jianrong Fan   +5 more
doaj   +2 more sources

GEOV2: Improved smoothed and gap filled time series of LAI, FAPAR and FCover 1 km Copernicus Global Land products

International Journal of Applied Earth Observations and Geoinformation, 2023
Essential vegetation variables including leaf area index (LAI), fraction of absorbed photosynthetic active radiation (FAPAR) and fraction of green vegetation cover (FCover) are produced and distributed in the Copernicus Global Land Service.
Aleixandre Verger, Jorge Sánchez-Zapero, Marie Weiss, Adrià Descals, Fernando Camacho, Roselyne Lacaze, Frédéric Baret   +6 more
doaj   +2 more sources

Validation of Global Moderate-Resolution FAPAR Products over Boreal Forests in North America Using Harmonized Landsat and Sentinel-2 Data

Remote Sensing
The fraction of absorbed photosynthetically active radiation (FAPAR) stands as a pivotal parameter within the Earth system, quantifying the energy exchange between vegetation and solar radiation.
Yinghui Zhang, Hongliang Fang, Zhongwen Hu, Yao Wang, Sijia Li, Guofeng Wu   +5 more
doaj   +2 more sources

A Comprehensive Evaluation of Global Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) Products of MODIS, GLASS, and GEO Over China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The fraction of absorbed photosynthetically active radiation (FAPAR) is defined as the fraction of incident solar radiation absorbed by vegetation for photosynthesis.
Liyong Xia, Shaoqi Gong, Li Li, Hailong Zhang, Jianguang Wen, Lu Han, Xiaozhou Xin, Shanshan Yu, Qinhuo Liu   +8 more
doaj   +2 more sources

Modeling of winter wheat fAPAR by integrating Unmanned Aircraft Vehicle-based optical, structural and thermal measurement

International Journal of Applied Earth Observations and Geoinformation, 2021
The fraction of absorbed photosynthetically active radiation (fAPAR) is a critical biophysical parameter for crop growth monitoring and yield estimation.
Zhengang Lv, Ran Meng, Jianguo Man, Linglin Zeng, Meiyv Wang, Binyuan Xu, Renjie Gao, Rui Sun, Feng Zhao   +8 more
doaj   +2 more sources

Evaluation of Sentinel-2 vegetation indices for prediction of LAI, fAPAR and fCover of winter wheat in Bulgaria

European Journal of Remote Sensing, 2021
The red-edge bands of Sentinel-2 allow for a greater diversity of spectral Vegetation Indices (VIs) to be calculated and used for vegetation characterization.
Ilina Kamenova, Petar Dimitrov
doaj   +2 more sources