Results 71 to 80 of about 1,783 (172)

Scaling Photosynthesis From Leaf to Canopy: A Synthesis of Optimization Theories, Vertical Structure, and Leaf Turnover Across Timescales

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 12, December 2025.
Abstract This paper introduces the Global Multilayer Canopy OPTimization (GMC‐OPT) model, designed to scale sub‐daily leaf‐level carbon fluxes to the canopy level. The model integrates three core components: canopy radiative transfer, optimization‐based physiology, and energy balance.
Chi Chen
wiley   +1 more source

Evaluation of Three Long Time Series for Global Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) Products

, 2018
The fraction of absorbed photosynthetically active radiation (FAPAR) is a critical input parameter in many climate and ecological models. Long time series of global FAPAR products are required for many applications, such as vegetation productivity ...
Liang, Shunlin, Xiao, Zhiqiang, Zhiqiang Xiao, Shunlin Liang, Sun, Rui, Rui Sun   +5 more
core   +1 more source

Parameter Estimation in Land Surface Models: Challenges and Opportunities With Data Assimilation and Machine Learning

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 11, November 2025.
Abstract Accurately predicting terrestrial ecosystem responses to climate change over long‐timescales is crucial for addressing global challenges. This relies on mechanistic modeling of ecosystem processes through land surface models (LSMs). Despite their importance, LSMs face significant uncertainties due to poorly constrained parameters, especially ...
Nina Raoult, Natalie Douglas, Natasha MacBean, Jana Kolassa, Tristan Quaife, Andrew G. Roberts, Rosie Fisher, Istem Fer, Cédric Bacour, Katherine Dagon, Linnia Hawkins, Nuno Carvalhais, Elizabeth Cooper, Michael C. Dietze, Pierre Gentine, Thomas Kaminski, Daniel Kennedy, Hannah M. Liddy, David J. P. Moore, Philippe Peylin, Ewan Pinnington, Benjamin Sanderson, Marko Scholze, Christian Seiler, T. Luke Smallman, Noemi Vergopolan, Toni Viskari, Mathew Williams, John Zobitz   +28 more
wiley   +1 more source

Delayed Pantropical Carbon Sink Recovery Due To Asynchronous Post‐El Niño Photosynthesis and Respiration Trajectories

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract Occurring in 2015/16, the strong El Niño has been shown to significantly influence the pantropical carbon fluxes with multiple lines of evidence. However, a comprehensive understanding on the regional and vegetation‐specific net ecosystem productivity (NEP) in response to this El Niño event and its recovery trajectories remain unclear.
Mousong Wu, Marko Scholze, Jing M. Chen, Yann Kerr, Michael Vossbeck, Nemesio Rodriguez‐Fernandez, Thomas Kaminski   +6 more
wiley   +1 more source

Automated and continuous estimation of FAPAR from distributed wireless PAR sensor networks [PDF]

Accurate estimation of the fraction of absorbed photosynthetically active radiation (FAPAR) is crucial for understanding plant productivity and ecosystem dynamics.
Pérez-Hoyos, Ana, Tiedemann, Frank, Lopez-Baeza, Ernesto, Morris, Harry, Lerebourg, Christophe, Culvenor, Darius, A. Brown, Luke, Klosterhalfen, Anne, Paramanik, Somnath, Grousset, Rémi, Bai, Gabriele, Lanconelli, Christian, Niro, Fabrizio, Maier, Stefan, James, Finn, Dash, Jadu, Clerici, Marco, Knohl, Alexander, Gobron, Nadine, Garcia-Rodriguez, David   +19 more
core   +3 more sources

Estimating Forest fAPAR from Multispectral Landsat-8 Data Using the Invertible Forest Reflectance Model INFORM

Remote Sensing, 2015
The estimation of the Fraction of Absorbed Photosynthetically Active Radiation in forests (forest fAPAR) from multi-spectral Landsat-8 data is investigated in this paper using a physically based radiative transfer model (Invertible Forest Reflectance ...
Huili Yuan, Ronghua Ma, Clement Atzberger, Fei Li, Steven Arthur Loiselle, Juhua Luo   +5 more
doaj   +1 more source

Validation of the Operational MERIS FAPAR Products

, 2006
This contribution discusses the validation of the operational Medium Resolution Imaging Spectrometer (MERIS) Level 2 land product which corresponds to the biophysical variable of the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR).
FABER ., LAVERGNE Thomas, TABERNER Malcolm, BRITO ., AUSSEDAT Ophelie, GOBRON Nadine, PINTY Bernard   +6 more
core   +1 more source

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   +1 more source

Assessment of MODIS NPP algorithm-based estimates using soil fertility and forest inventory data in mixed hemiboreal forests

Metsanduslikud Uurimused, 2017
Optical remote sensing data-based estimates of terrestrial net primary production (NPP) are released by different projects using light use efficiency-type models.
Lang Mait, Kõlli Raimo, Nikopensius Maris, Nilson Tiit, Neumann Mathias, Moreno Adam   +5 more
doaj   +1 more source

Quality Assessment of PROBA-V LAI, fAPAR and fCOVER Collection 300 m Products of Copernicus Global Land Service

Remote Sensing, 2020
The Copernicus Global Land Service (CGLS) provides global time series of leaf area index (LAI), fraction of absorbed photosynthetically active radiation (fAPAR) and fraction of vegetation cover (fCOVER) data at a resolution of 300 m and a frequency of 10
Beatriz Fuster, Jorge Sánchez-Zapero, Fernando Camacho, Vicente García-Santos, Aleixandre Verger, Roselyne Lacaze, Marie Weiss, Frederic Baret, Bruno Smets   +8 more
doaj   +1 more source