Results 41 to 50 of about 493 (122)

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

An RTM-Driven Machine Learning Approach for Estimating High-Resolution FAPAR From LANDSAT 5/7/8/9 Surface Reflectance

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Fraction of absorbed photosynthetically active radiation (FAPAR) is an essential indicator of vegetation productivity and carbon uptake. Although coarse-resolution FAPAR products from moderate-resolution imaging spectroradiometer (MODIS) and visible ...
Guodong Zhang, Gaofei Yin, Yi Zhang, Jiangchuan Hu, Zongyan Li, Changjing Wang, Dujuan Ma, Jiangliu Xie   +7 more
doaj   +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

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

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

A Comprehensive Evaluation of Global Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) Products of MODIS, GLASS, and GEO Over China

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The fraction of absorbed photosynthetically active radiation (FAPAR) is defined as the fraction of incident solar radiation absorbed by vegetation for photosynthesis.
Liyong Xia, Shaoqi Gong, Li Li, Hailong Zhang, Jianguang Wen, Lu Han, Xiaozhou Xin, Shanshan Yu, Qinhuo Liu   +8 more
doaj   +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

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

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

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