Results 51 to 60 of about 544 (160)

Laboratory and image spectroscopy for evaluating the biophysical state of meadow vegetation in the Krkonoše National Park

open access: yesMiscellanea Geographica: Regional Studies on Development, 2014
The paper deals with the evaluation of mountain meadow vegetation condition using in-situ measurements of the fraction of Accumulated Photosynthetically Active Radiation (fAPAR) and Leaf Area Index (LAI). The study analyses the relationship between these
Jelének Jan   +5 more
doaj   +1 more source

Evaluation of Global Decametric-Resolution LAI, FAPAR and FVC Estimates Derived from Sentinel-2 Imagery

open access: yesRemote Sensing, 2020
Global biophysical products at decametric resolution derived from Sentinel-2 imagery have emerged as a promising dataset for fine-scale ecosystem modeling and agricultural monitoring.
Qiong Hu   +8 more
doaj   +1 more source

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

open access: yesJournal 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

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

open access: yesJournal 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   +28 more
wiley   +1 more source

Quantifying the missing link between forest albedo and productivity in the boreal zone [PDF]

open access: yesBiogeosciences, 2016
Albedo and fraction of absorbed photosynthetically active radiation (FAPAR) determine the shortwave radiation balance and productivity of forests. Currently, the physical link between forest albedo and productivity is poorly understood, yet it is crucial
A. Hovi   +4 more
doaj   +1 more source

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

open access: yesGeophysical 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   +6 more
wiley   +1 more source

Bridging the gap between remotely sensed phenology and the underlying ecophysiological processes: The SWELL model

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 7, Page 1473-1488, July 2025.
Abstract Vegetation phenology studies the periodic recurrence of plant life‐cycle events and is essential for understanding ecosystem responses to environmental changes. Remote sensing has become a key tool for monitoring phenological events on large spatial and temporal scales, primarily using vegetation indices like the Normalized Difference ...
Sofia Bajocco   +2 more
wiley   +1 more source

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

open access: yesRemote 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   +5 more
doaj   +1 more source

Continental Scale Soil Monitoring: A Proposed Multi‐Scale Framing of Soil Quality

open access: yesEuropean Journal of Soil Science, Volume 76, Issue 4, July–August 2025.
ABSTRACT Globally, soils are subjected to various management practices and stressors which can lead to degradation. This makes their protection essential for sustaining many functions and services as well as maintaining the overall life support system of Earth.
Grant A. Campbell   +23 more
wiley   +1 more source

Assessment of Satellite-Derived FAPAR Products With Different Spatial Resolutions for Gross Primary Productivity Estimation

open access: yesIEEE 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   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy