Results 41 to 50 of about 1,783 (172)

Modeling of winter wheat fAPAR by integrating Unmanned Aircraft Vehicle-based optical, structural and thermal measurement

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2021
The fraction of absorbed photosynthetically active radiation (fAPAR) is a critical biophysical parameter for crop growth monitoring and yield estimation.
Zhengang Lv   +8 more
doaj   +1 more source

Simultaneous assimilation of satellite and eddy covariance data for improving terrestrial water and carbon simulations at a semi-arid woodland site in Botswana [PDF]

open access: yesBiogeosciences, 2013
Terrestrial productivity in semi-arid woodlands is strongly susceptible to changes in precipitation, and semi-arid woodlands constitute an important element of the global water and carbon cycles.
T. Kato   +6 more
doaj   +1 more source

Improvement of FAPAR Estimation Under the Presence of Non-Green Vegetation Considering Fractional Vegetation Coverage

open access: yesRemote Sensing
The homogeneous turbid medium assumption inherent to the Beer-Lambert’s law can lead to a reduction in the shading effect between leaves when non-green vegetation canopies are present, resulting in an overestimation of the fraction of absorbed ...
Rui Li   +10 more
doaj   +1 more source

MERIS GPP/NPP product for Estonia: II. Complex meteorological limiting factor and optimum leaf area index / MERIS’e GPP/NPP tulem Eesti jaoks: II. Kompleksne meteoroloogiline piirangutegur ja optimaalne lehepinnaindeks

open access: yesMetsanduslikud Uurimused, 2014
The merits and possible problems of the light use efficiency-concept based GPP/NPP models applied together with satellite images and meteorological data to quantitatively understand the role of different meteorological factors in forest productivity are ...
Nilson Tiit, Rennel Mattias, Lang Mait
doaj   +1 more source

Global White-Sky and Black-Sky FAPAR Retrieval Using the Energy Balance Residual Method: Algorithm and Validation

open access: yesRemote Sensing, 2019
The fraction of absorbed photosynthetically active radiation by vegetation (FAPAR) is a key variable in describing the light absorption ability of the vegetation canopy.
Liangyun Liu   +6 more
doaj   +1 more source

Evaluation of Sentinel-2 vegetation indices for prediction of LAI, fAPAR and fCover of winter wheat in Bulgaria

open access: yesEuropean Journal of Remote Sensing, 2021
The red-edge bands of Sentinel-2 allow for a greater diversity of spectral Vegetation Indices (VIs) to be calculated and used for vegetation characterization.
Ilina Kamenova, Petar Dimitrov
doaj   +1 more source

Future Projections of Burned Area in Europe Highlight the Importance of Human Action

open access: yesGlobal Change Biology, Volume 32, Issue 8, August 2026.
Our simulations with two fire models and the LPJmL Dynamic Global Vegetation Model show that both biophysical and socio‐economic drivers shape future wildfire activity in Europe. Fire weather and fire management capacity dominate broad trends, while changes in land use, vegetation and population density shape regional patterns. Improved fire management
Maik Billing   +10 more
wiley   +1 more source

Adaptation and Response in Drylands: A Dryland Research Agenda and Campaign Strategy

open access: yesGlobal Change Biology, Volume 32, Issue 7, July 2026.
The Adaptation and Response in Drylands (ARID) campaign was selected by NASA as a scoping study to develop a research agenda for a dryland field campaign. Here, we detail our ARID science research agenda and implementation plan that were developed based on an extensive community engagement effort in over 160 events with over a thousand scientists, land
Andrew F. Feldman   +35 more
wiley   +1 more source

Inter–Annual Variability of Model Parameters Improves Simulation of Annual Gross Primary Production

open access: yesJournal of Advances in Modeling Earth Systems, Volume 18, Issue 6, June 2026.
Abstract Parametric uncertainty can hinder land surface models (LSM) from accurately simulating carbon fluxes, such as gross primary production (GPP). These models generally cannot capture inter–annual variability (IAV) of fluxes well due to missing processes, and temporally varying parameters can partially alleviate this limitation.
Ranit De   +18 more
wiley   +1 more source

GEOV2: Improved smoothed and gap filled time series of LAI, FAPAR and FCover 1 km Copernicus Global Land products

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2023
Essential vegetation variables including leaf area index (LAI), fraction of absorbed photosynthetic active radiation (FAPAR) and fraction of green vegetation cover (FCover) are produced and distributed in the Copernicus Global Land Service.
Aleixandre Verger   +6 more
doaj   +1 more source

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