Results 71 to 80 of about 5,055 (231)

Radiation use and understory aboveground net primary production in a temperate dryland

Ecosphere, Volume 16, Issue 12, December 2025.
Abstract We investigated the spatial and temporal variability of herbaceous radiation use efficiency (RUEh$$ {\mathrm{RUE}}_h $$) and herbaceous aboveground net primary production (ANPPh$$ {\mathrm{ANPP}}_h $$) of big sagebrush ecosystems in Wyoming's Upper Green River Basin.
Samuel Wilson, José M. Paruelo, Ingrid C. Burke, William K. Lauenroth   +3 more
wiley   +1 more source

Characterisation of Functional-Trait Dynamics at High Spatial Resolution in a Mediterranean Forest from Sentinel-2 and Ground-Truth Data

Remote Sensing, 2018
The characterisation of functional-trait dynamics of vegetation from remotely sensed data complements the structural characterisation of ecosystems. In this study we characterised for the first time the spatial heterogeneity of the intra-annual dynamics ...
Santiago Schauman, Aleixandre Verger, Iolanda Filella, Josep Peñuelas   +3 more
doaj   +1 more source

JRC Experience on the Development of Drought Information Systems [PDF]

, 2012
From the definition of drought to its monitoring and assessment, this report summarizes the main steps towards an integrated drought information system.
BARBOSA FERREIRA Paulo, HORION STÉPHANIE, SAIOTE CARRÃO HUGO MIGUEL, SINGLETON ANDREW, VOGT Juergen   +4 more
core   +1 more source

Dominant role of benthic photosynthesis for the metabolism of carbonate sands in a subtropical inner shelf

Limnology and Oceanography, Volume 70, Issue 12, Page 3621-3633, December 2025.
Abstract Carbonate coral sands are an integral part of the carbon and nutrient cycles in subtropical and tropical coastal environments. Recent studies indicate that nearshore carbonate sands may be hotspots for organic matter production and respiration, but the processes and their controls are poorly understood due to a lack of noninvasive in situ ...
Alireza Merikhi, Peter Berg, Markus Huettel   +2 more
wiley   +1 more source

A New FAPAR Analytical Model Based on the Law of Energy Conservation: A Case Study in China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014
The fraction of absorbed photosynthetically active radiation (FAPAR) characterizes the energy-absorption ability of the vegetation canopy. It is a critical input to many land-surface models such as crop growth models, net primary productivity models, and
Wenjie Fan, Yuan Liu, Xiru Xu, Gaoxing Chen, Beitong Zhang   +4 more
doaj   +1 more source

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

Constraining a land-surface model with multiple observations by application of the MPI-Carbon Cycle Data Assimilation System V1.0 [PDF]

Geoscientific Model Development, 2016
We describe the Max Planck Institute Carbon Cycle Data Assimilation System (MPI-CCDAS) built around the tangent-linear version of the JSBACH land-surface scheme, which is part of the MPI-Earth System Model v1.
G. J. Schürmann, T. Kaminski, C. Köstler, N. Carvalhais, M. Voßbeck, J. Kattge, R. Giering, C. Rödenbeck, M. Heimann, S. Zaehle   +9 more
doaj   +1 more source

Validation and Conformity Testing of Sentinel-3 Green Instantaneous FAPAR and Canopy Chlorophyll Content Products

Remote Sensing
This article presents validation and conformity testing of the Sentinel-3 Ocean Land Colour Instrument (OLCI) green instantaneous fraction of absorbed photosynthetically active radiation (FAPAR) and OLCI terrestrial chlorophyll index (OTCI) canopy ...
Fernando Camacho, E. Martínez-Sánchez, L. Brown, H. Morris, R. Morrone, Owen Williams, Jadunandan Dash, N. Origo, Jorge Sánchez-Zapero, V. Boccia   +9 more
semanticscholar   +1 more source

The interannual variability of Africa's ecosystem productivity: a multi-model analysis [PDF]

, 2008
We are comparing spatially explicit process-model based estimates of the terrestrial carbon balance and its components over Africa and confront them with remote sensing based proxies of vegetation productivity and atmospheric inversions of land ...
BEER C., BRAAKHEKKE M., CIAIS P., GHENT D., GOBRON Nadine, JUNG Martin, KADUK J., LEHSTEN V., REICHSTEIN M., RODENBECK C., VIOVY N., WEBER Ulrich   +11 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