Results 61 to 70 of about 1,783 (172)

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

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

Intra‐annual variation of fecal nitrogen of red deer in Mediterranean habitats and its relationship with NDVI and bioclimatic indices

The Journal of Wildlife Management, Volume 90, Issue 1, January 2026.
This study on red deer in a fenced Mediterranean estate found strong intra‐annual variation in fecal nitrogen, reflecting seasonal diet quality changes. Fecal nitrogen was associated with normalized difference vegetation index (NDVI) from herbaceous vegetation but not with bioclimatic indices (real bioclimatic intensity [RBI], standardized ...
Eva de la Peña, Jesús Fernández‐Habas, Rafael Villafuerte‐Jordán, José M. García del Barrio, Juan Carranza, María Martínez‐Jauregui   +5 more
wiley   +1 more source

Physics-Guided Machine learning approach for estimating spatiotemporally seamless FAPAR from Landsat surface reflectance

International Journal of Applied Earth Observations and Geoinformation
Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) is a key biophysical parameter for characterizing vegetation photosynthetic efficiency, playing a crucial role in understanding terrestrial ecosystems, global carbon cycles, and climate ...
Yimin Ni, Gaofei Yin, Guodong Zhang, Gang Sun, Xiaodan Wu, Xiaojun Li, Xinyan Liu, Anxin Ding, Rui Chen, Meilian Wang, Yi Zhang, Jiangchuan Hu, Zongyan Li, Aleixandre Verger   +13 more
doaj   +1 more source

A Century of Drought Research (1900–2023): Scientific Developments, Methodological Innovations, and Emerging Frontiers

Water Resources Research, Volume 62, Issue 1, January 2026.
Abstract Drought significantly affects water resources, agriculture, energy, and ecosystems, revealing enduring socio‐economic vulnerabilities over the centuries. This review synthesizes a century of development and recent advances in drought research (1900–2023), drawing on a bibliometric analysis of over 152,000 peer‐reviewed publications. The review
Amitesh Sabut, Ashok Mishra
wiley   +1 more source

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

Miscellanea 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, Kupková Lucie, Zagajewski Bogdan, Březina Stanislav, Ochytra Adrian, Marcinkowska Adriana   +5 more
doaj   +1 more source

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

Remote 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, Jingya Yang, Baodong Xu, Jianxi Huang, Muhammad Sohail Memon, Gaofei Yin, Yelu Zeng, Jing Zhao, Ke Liu   +8 more
doaj   +1 more source

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

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

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

Biogeosciences, 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, J. Liang, L. Korhonen, H. Kobayashi, M. Rautiainen   +4 more
doaj   +1 more source