Results 11 to 20 of about 544 (160)

Evaluation of In Situ FAPAR Measurement Protocols Using 3D Radiative Transfer Simulations

Remote Sensing
The fraction of absorbed photosynthetically active radiation (FAPAR) is one of the bio-geophysical Essential Climate Variables assessed through remote sensing observations and distributed globally by space and environmental agencies. Any reliable remote sensing product should be benchmarked against a reference, which is normally determined by means of ...
Christian Lanconelli, Fabrizio Cappucci, Jennifer Adams, Nadine Gobron   +3 more
openaire   +3 more sources

Land potential assessment and trend-analysis using 2000-2021 FAPAR monthly time-series at 250 m spatial resolution. [PDF]

PeerJ
The article presents results of using remote sensing images and machine learning to map and assess land potential based on time-series of potential Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) composites. Land potential here refers to
Hackländer J, Parente L, Ho YF, Hengl T, Simoes R, Consoli D, Şahin M, Tian X, Jung M, Herold M, Duveiller G, Weynants M, Wheeler I.   +12 more
europepmc   +3 more sources

Global land surface 250 m 8 d fraction of absorbed photosynthetically active radiation (FAPAR) product from 2000 to 2021 [PDF]

Earth System Science Data, 2022
The fraction of absorbed photosynthetically active radiation (FAPAR) is a critical land surface variable for carbon cycle modeling and ecological monitoring.
H. Ma, S. Liang, C. Xiong, Q. Wang, A. Jia, B. Li   +5 more
doaj   +1 more source

Fractional Vegetation Cover Derived from UAV and Sentinel-2 Imagery as a Proxy for In Situ FAPAR in a Dense Mixed-Coniferous Forest?

Remote Sensing, 2022
The fraction of absorbed photosynthetic active radiation (FAPAR) is an essential climate variable for assessing the productivity of ecosystems. Satellite remote sensing provides spatially distributed FAPAR products, but their accurate and efficient ...
Birgitta Putzenlechner, Philip Marzahn, Philipp Koal, Arturo Sánchez-Azofeifa   +3 more
doaj   +1 more source

Comparison of Absorbed and Intercepted Fractions of PAR for Individual Trees Based on Radiative Transfer Model Simulations

Remote Sensing, 2021
The fraction of absorbed photosynthetically active radiation (fAPAR) is a key parameter for estimating the gross primary production (GPP) of trees. For continuous, dense forest canopies, fAPAR, is often equated with the intercepted fraction, fIPAR.
Wojciech Wojnowski, Shanshan Wei, Wenjuan Li, Tiangang Yin, Xian-Xiang Li, Genevieve Lai Fern Ow, Mohamed Lokman Mohd Yusof, Andrew J. Whittle   +7 more
doaj   +1 more source

Generating high spatial resolution GLASS FAPAR product from Landsat images

Science of Remote Sensing, 2022
The fraction of absorbed photosynthetically active radiation (FAPAR) is an essential biophysical variable for monitoring vegetation growth and quantitatively describing the efficiency of light absorption by vegetation.
Huaan Jin, Ainong Li, Shunlin Liang, Han Ma, Xinyao Xie, Tian Liu, Tao He   +6 more
doaj   +1 more source

Variations of Foliage Chlorophyll fAPAR and Foliage Non-Chlorophyll fAPAR (fAPAR$_{\rm chl}$, fAPAR$_{\rm non\mathchar "702D chl}$) at the Harvard Forest

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2013
In the last three decades, substantial advancements have been made in understanding the global carbon cycle. Some of these advancements involve using the fraction of absorbed photosynthetically active radiation (fAPAR) by an entire canopy (fAPARcanopy) and/or the Normalized Difference Vegetation Index (NDVI) in modeling studies.
Qingyuan Zhang, Elizabeth M. Middleton, Yen-Ben Cheng, David R. Landis   +3 more
openaire   +1 more source

La formación de la cultura jurídica brasilera en la segunda mitad del siglo XIX

Precedente, 2010
Este estudio tiene por objeto identificar la existencia de una efectiva cultura jurídica brasilera en la segunda mitad del siglo XIX; nos preguntamos cuáles fueron las efectivas contribuciones para la formación de esta cultura jurídica en nuestro país ...
Breezy Vizeu
doaj   +1 more source

A RELAÇÃO ENTRE DIREITO E MORAL: uma análise a partir do princípio da moralidade

Revista Eletrônica Direito e Política, 2008
O presente trabalho tem como objeto central a tratativa da relação entre direito e moral. Dessa forma, desde o início dos tempos esses dois institutos se entrelaçam e se separam de forma abrupta (dependendo do contexto).
Carolina de Freitas Paladino
doaj   +1 more source

Quantifying Fundamental Vegetation Traits over Europe Using the Sentinel-3 OLCI Catalogue in Google Earth Engine. [PDF]

Remote Sens (Basel), 2022
Thanks to the emergence of cloud-computing platforms and the ability of machine learning methods to solve prediction problems efficiently, this work presents a workflow to automate spatiotemporal mapping of essential vegetation traits from Sentinel-3 (S3)
Reyes-Muñoz P, Pipia L, Salinero-Delgado M, Belda S, Berger K, Estévez J, Morata M, Rivera-Caicedo JP, Verrelst J.   +8 more
europepmc   +2 more sources