Results 21 to 30 of about 1,958,058 (301)

Evaluation of Vegetation Characteristics over Qinghai- Xizang Plateau Simulated by A Vegetation Dynamic Model

Gaoyuan qixiang, 2023
In this study， performances of NCAR Community Land Surface Model CLM （version 4.5） coupled with dynamic vegetation and carbon-nitrogen model （CN-DV） in representing the observed vegetation characteristics of satellite over the Qinghai-Xizang Plateau （QXP）
Yan BAO, Yuqi WANG, Sulan NAN, Miao YU
doaj   +1 more source

LIGHT DIFFUSION IN THE TROPICAL DRY FOREST OF COSTA RICA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Leaf Area Index (LAI) has been defined as the total leaf area (one-sided) in relation to the ground. LAI has an impact on tree growth and recruitment through the interception of light, which in turn affects primary productivity.
S. Calvo-Rodriguez, G. A. Sanchez-Azofeifa   +1 more
doaj   +1 more source

Spatio-temporal variation in leaf area index in the Yan Mountains over the past 40 years and its relationship to hydrothermal conditions

Ecological Indicators, 2023
Changes in hydrothermal conditions have significant effects on vegetation, but there is still a lack of understanding of how vegetation responds to land surface (surface temperature and soil moisture) and meteorological (temperature and precipitation ...
Da Guo, Xiaoning Song, Ronghai Hu, Rui Ma, Yanan Zhang, Liang Gao, Xinming Zhu, Paul Kardol   +7 more
doaj   +1 more source

Relação entre índice de área foliar e frações de componentes puros do modelo linear de mistura espectral, usando imagens ETM+/Landsat Relationship between leaf area index and endmember fractions from linear spectral mixture modelling, using ETM+/Landsat images

Engenharia Agrícola, 2004
O índice de área foliar (IAF) é uma das mais importantes variáveis biofísicas da vegetação, estando relacionado diretamente com a evapotranspiração, com a produtividade da vegetação e com a interceptação da chuva pelo dossel.
Alexandre C. Xavier, Carlos A. Vettorazzi, Ronalton E. Machado   +2 more
doaj   +1 more source

Improving the MODIS leaf area index product for a cropland with the nonlinear autoregressive neural network with eXogenous input model

Frontiers in Earth Science, 2023
The leaf area index (LAI) is a crucial descriptive parameter of the dynamic change of ground vegetation. The widely used MODIS LAI product, however, does not satisfy the requirements of regional eco-environment modeling.
Shangzhi Li, Meng Zhang
doaj   +1 more source

Leaf area index based nitrogen diagnosis in irrigated lowland rice

Journal of Integrative Agriculture, 2018
Leaf area index (LAI) is used for crop growth monitoring in agronomic research, and is promising to diagnose the nitrogen (N) status of crops. This study was conducted to develop appropriate LAI-based N diagnostic models in irrigated lowland rice.
Xiao-jun LIU, Qiang CAO, Zhao-feng YUAN, Xia LIU, Xiao-ling WANG, Yong-chao TIAN, Wei-xing CAO, Yan ZHU   +7 more
doaj   +1 more source

Retrieval of the Leaf Area Index from MODIS Top-of-Atmosphere Reflectance Data Using a Neural Network Supported by Simulation Data

Remote Sensing, 2022
The leaf area index (LAI), a key parameter used to characterize the structure and function of the vegetation canopy, is crucial to simulations of the carbon, nitrogen, and water cycles of Earth’s system.
Weiyan Wang, Yingying Ma, Xiaoliang Meng, Lin Sun, Chen Jia, Shikuan Jin, Hui Li   +6 more
doaj   +1 more source

A Tunable Self-Offloading Module for Plantar Pressure Regulation in Diabetic Patients

Applied System Innovation
Plantar pressure plays a crucial role in the pathogenesis of foot ulcers among patients with diabetes and peripheral polyneuropathy. Pressure relief is a key requirement for both the prevention and treatment of plantar ulcers.
Bhawnath Tiwari, Kenny Jeanmonod, Paolo Germano, Christian Koechli, Sofia Lydia Ntella, Zoltan Pataky, Yoan Civet, Yves Perriard   +7 more
doaj   +1 more source

Spatial Enhancement of MODIS-based Images of Leaf Area Index: Application to the Boreal Forest Region of Northern Alberta, Canada

Remote Sensing, 2010
Leaf area index (LAI) is one of the most commonly used ecological variables in describing forests. Since 2000, 1-km resolution Moderate Resolution Imaging Spectroradiometer (MODIS)-based 8-day composites of LAI have been operationally available from the ...
Charles P.-A. Bourque, Quazi K. Hassan
doaj   +1 more source

Puittaimestiku kaardistamine aerolidari andmete põhjal metsana lisanduvatel aladel/ Estimation of fractional forest cover from airborne laser scanning data in abandoned agricultural land

Metsanduslikud Uurimused, 2013
The abandonment of agricultural land is an actual problem in Estonia due to significant impact on landscape ecology and structure. Abandoned agricultural fields are usually converting into forest.
Mõistus Marta, Lang Mait, Sims Allan
doaj   +1 more source