Results 31 to 40 of about 5,055 (231)

LAI, fAPAR and fCover CYCLOPES global products derived from VEGETATION [PDF]

Remote Sensing of Environment, 2007
Frederic Baret, Olivier Hagolle, Bernhard Geiger   +2 more
exaly   +2 more sources

Global Assessment of Environmental and Plant-Trait Influences on Root: Shoot Biomass Ratios. [PDF]

Glob Chang Biol
We assembled a large global dataset by combining several previous compilations to test eco‐evolutionary optimality (EEO) hypotheses about how plants allocate carbon above‐ and below‐ground (root: shoot biomass ratios). Our analysis shows how carbon allocation in woody and herbaceous plants responds to environmental conditions and plant traits.
Ding R, Nóbrega RLB, Prentice IC.
europepmc   +2 more sources

Assessing satellite-derived land product quality for earth system science applications: results from the ceos lpv sub-group [PDF]

, 2010
The value of satellite derived land products for science applications and research is dependent upon the known accuracy of the data. CEOS (Committee on Earth Observation Satellites), the space arm of the Group on Earth Observations (GEO), plays a key ...
Baret, F., Herold, M., Nickeson, J., Nightingale, J., Schaepman-Strub, G.   +4 more
core   +13 more sources

Mapping the density of giant trees in the Amazon. [PDF]

New Phytol
Summary Tall trees (height ≥ 60 m) are keystone elements of tropical forests, strongly influencing biodiversity, carbon storage, and ecosystem resilience. Yet, their density and spatial distribution remain poorly quantified, especially in remote Amazonian regions, limiting our understanding of their ecological roles and contribution to forest–climate ...
de Lima RB, da Silva DAS, Nunes MH, Bittencourt PRL, Groenendyk P, de Oliveira CP, Granato-Souza D, Caraciolo Ferreira RL, Aleixo da Silva JA, Aguirre-Gutiérrez J, Jackson T, de Matos Filho JR, Aparício PDS, da Silva JPG, de Toledo JJ, Guedes MC, de Almeida DRA, Higuchi N, Wagner FH, Ometto JP, Görgens EB.   +20 more
europepmc   +2 more sources

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

Accuracy assessment on the number of flux terms needed to estimate in situ fAPAR

International Journal of Applied Earth Observations and Geoinformation, 2020
The fraction of Absorbed Photosynthetically Active Radiation (fAPAR) is a crucial variable for assessing global carbon balances and currently, there is an urgent need for reference data to validate satellite-derived fAPAR products.
Birgitta Putzenlechner, Philip Marzahn, Arturo Sanchez-Azofeifa   +2 more
doaj   +1 more source

Ensemble Machine Learning Prediction of Potential FAPAR: Monthly time-series 2021 and Long-Term Comparison with Actual FAPAR

, 2023
General Description The dataset contains composites at 250 m spatial resolution of (1) monthly potential FAPAR for the year 2021 from ensemble ML model predictions, (2) the model deviance for each prediction, (3) the yearly average of potential FAPAR, (4) the yearly average of actual FAPAR and (5) the yearly average of the difference between actual and
Julia Hackländer;, Parente, Leandro, Consoli, Davide, Hengl, Tomislav   +3 more
openaire   +1 more source

Modelling sun-induced fluorescence and photosynthesis with a land surface model at local and regional scales in northern Europe [PDF]

, 2016
Recent satellite observations of sun-induced chlorophyll fluorescence (SIF) are thought to provide a large-scale proxy for gross primary production (GPP), thus providing a new way to assess the performance of land surface models (LSMs). In this study, we
Aalto, Tuula, Aurela, Mika, Guanter, Luis, Kolari, Pasi, Köhler, Philipp, Laurila, Tuomas, Lohila, Annalea, Magnani, Federico, Markkanen, Tiina, Thum, Tea, Van der Tol, Christiaan, Zaehle, Sönke   +11 more
core   +11 more sources

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

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