Results 91 to 100 of about 5,055 (231)

Studying the change in fAPAR after forest fires in Siberia using MODIS [PDF]

International Journal of Remote Sensing, 2008
Disturbance events such as fire have major effects on forest dynamics, succession and the carbon cycle in the boreal biome. This paper focuses on establishing whether characteristic spatio-temporal patterns of the fraction of Absorbed Photosynthetically Active Radiation (fAPAR) occur in the initial two years after a fire event in Siberian boreal ...
Cuevas-González, Maria, Gerard, France, Balzter, Heiko, Riaño, David   +3 more
openaire   +3 more sources

Addressing Challenges in Simulating Inter–Annual Variability of Gross Primary Production

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 5, May 2025.
Abstract A long‐standing challenge in studying the global carbon cycle has been understanding the factors controlling inter–annual variation (IAV) of carbon fluxes, and improving their representations in existing biogeochemical models. Here, we compared an optimality‐based model and a semi‐empirical light use efficiency model to understand how current ...
Ranit De, Shanning Bao, Sujan Koirala, Alexander Brenning, Markus Reichstein, Torbern Tagesson, Michael Liddell, Andreas Ibrom, Sebastian Wolf, Ladislav Šigut, Lukas Hörtnagl, William Woodgate, Mika Korkiakoski, Lutz Merbold, T. Andrew Black, Marilyn Roland, Anne Klosterhalfen, Peter D. Blanken, Sara Knox, Simone Sabbatini, Bert Gielen, Leonardo Montagnani, Rasmus Fensholt, Georg Wohlfahrt, Ankur R. Desai, Eugénie Paul‐Limoges, Marta Galvagno, Albin Hammerle, Georg Jocher, Borja Ruiz Reverter, David Holl, Jiquan Chen, Luca Vitale, M. Altaf Arain, Nuno Carvalhais   +34 more
wiley   +1 more source

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

Influence of Spring and Autumn Phenological Transitions on Forest Ecosystem Productivity [PDF]

, 2010
We use eddy covariance measurements of net ecosystem productivity (NEP) from 21 FLUXNET sites (153 site-years of data) to investigate relationships between phenology and productivity (in terms of both NEP and gross ecosystem photosynthesis, GEP) in ...
ANDY BLACK T., CIAIS Philippe, DELBART Nicolas, FRIEDL Mark A., GOBRON Nadine, HOLLINGER David Y., KUTSCH Werner L., LONGDOZ B., LUYSSAERTS Sebastiaan, MIGLIAVACCA Mirco, MONTAGNANI Leonardo, MOORS E., PIAO Shilong, REBMANN C., REICHSTEIN Markus, RICHARDSON Andrew D., SAIGUSA Nobuko, TOMELLERI Enrico, VARGAS Rodrigo, VARLAGIN Andrej, WILLIAM MUNGER J.   +20 more
core   +1 more source

A Two Stream Radiative Transfer Model for Vertically Inhomogeneous Vegetation Canopies Including Internal Emission

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 5, May 2025.
Abstract Two stream models of radiative transfer are used in the land surface schemes of climate and Earth system models to represent the interaction of solar and terrestrial radiation with vegetation canopies. This is done both to model the surface energy balance and the photosynthetic flux of carbon into the terrestrial biosphere.
T. L. Quaife
wiley   +1 more source

Assessing the fidelity of Landsat-based fAPAR models in two diverse sugarcane growing regions

Computers and Electronics in Agriculture, 2020
Sugarcane is a globally important crop used for producing sugar and for generating renewable energy. Timely and accurate forecasts of sugarcane yield and production are needed to optimize supply chain operations.
S. J. Muller, P. Sithole, A. Singels, A. Niekerk   +3 more
semanticscholar   +1 more source

Recent Forest Loss in the Brazilian Amazon Causes Substantial Reductions in Dry Season Precipitation

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract The Amazon has experienced extensive deforestation in recent decades, causing substantial impacts on local and regional climate. However, the precipitation response to this recent forest cover change remains unclear. Here, we examined biophysical effects of forest cover change in the Brazilian Amazon on dry season precipitation using a ...
Yu Liu, Dominick V. Spracklen, Douglas J. Parker, Joseph Holden, Jun Ge, Weidong Guo   +5 more
wiley   +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

A methodology for the characterization of land use using medium-resolution spatial images [PDF]

, 2018
Introducción: La caracterización de los usos del suelo representa uno de los insumos indispensables para el manejo de los recursos naturales a diferentes escalas.
Gandini, Marcelo Luciano, Guevara Ochoa, Cristian, Lara, Bruno Daniel, Vives, Luis Sebastián, Zimmermann, Erik Daniel   +4 more
core   +1 more source

Spatial Attribution of Temporal Variability in Global Land‐Atmosphere CO2 Exchange Using a Model‐Data Integration Framework

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 3, March 2025.
Abstract The spatial contribution to the global land‐atmosphere carbon dioxide (CO2) exchange is crucial in understanding and projecting the global carbon cycle, yet different studies diverge on the dominant regions. Informing land models with observational data is a promising way to reduce the parameter and structural uncertainties and advance our ...
H. Lee, M. Jung, N. Carvalhais, M. Reichstein, M. Forkel, A. A. Bloom, J. Pacheco‐Labrador, S. Koirala   +7 more
wiley   +1 more source