Results 21 to 30 of about 6,146 (210)

Forest Canopy Changes in the Southern Amazon during the 2019 Fire Season Based on Passive Microwave and Optical Satellite Observations

Remote Sensing, 2021
Canopy dynamics associated with fires in tropical forests play a critical role in the terrestrial carbon cycle and climate feedbacks. The aim of this study was to characterize forest canopy dynamics in the southern Amazon during the 2019 fire season ...
Huixian Zhang, Daniel Fiifi Tawia Hagan, Ricardo Dalagnol, Yi Liu   +3 more
doaj   +1 more source

Global Change in Terrestrial Ecosystem Detected by Fusion of Microwave and Optical Satellite Observations

Remote Sensing, 2021
The detection of global land change via satellite observation is a major challenge in improving the understanding of global environmental change. In this study, we develop a new vegetation index which can be used as a proxy for the fractions of tree ...
Hideharu Nara, Yohei Sawada
doaj   +1 more source

Optical characteristics and factors that influence representative Lakes in the Taihu Lake basin, China

Journal of Freshwater Ecology, 2022
From 2018 to 2019, a survey of a typical lakes system in the Taihu Lake basin, China, was carried out. To provide reference values for the restoration and management of submerged vegetation in the lakes, the optical attenuation coefficient (Kd) and ...
Weixiang Ren, Xiaodong Wu, Jianying Chao, Xuguang Ge, Shunmei Zhu, Mengdie Zhou   +5 more
doaj   +1 more source

Characterizing the channel dependence of vegetation effects on microwave emissions from soils

Geo-spatial Information Science
The two vegetation transfer parameters of [Formula: see text] (Vegetation Optical Depth,VOD) and [Formula: see text] (Omega) could vary significantly across microwave channels in terms of frequencies, polarizations, and incidence angles, and their ...
Jiaqi Zhang, Tianjie Zhao, Shurun Tan, Nemesio Rodriguez-Fernandez, Huazhu Xue, Na Yang, Yann Kerr, Jiancheng Shi   +7 more
doaj   +1 more source

Using vegetation indices for soil-moisture retrievals from passive microwave radiometry [PDF]

Hydrology and Earth System Sciences, 2001
Surface soil moisture and the nature of the overlying vegetation both influence microwave emission from land surfaces significantly. One widely discussed but underused method for allowing for the effect of vegetation on soil-moisture retrievals from ...
E.J. Burke, E.J. Burke, W.J. Shuttleworth, W.J. Shuttleworth, A.N. French, A.N. French   +5 more
doaj  

In Situ Integrated Titanium Oxide Synaptic Phototransistor Enabling Multimodal Plasticity and Noise‐Robust Selective Attention

Advanced Materials Technologies, EarlyView.
An in situ integrated TiO2/SiOx/Al2O3 synaptic phototransistor couples ultraviolet and electrical stimuli within a scalable, CMOS‐compatible oxide stack. Multimodal plasticity, spike‐timing‐dependent learning, and bee‐inspired associative conditioning are achieved through trap‐mediated temporal dynamics.
Youngbin Yoon, Jaehee Lee, Jeongwook Kwon, Yongki Kim, Myunghun Shin, Jung Wook Lim   +5 more
wiley   +1 more source

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

Advanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source

Response of vegetation optical depth across multiple microwave frequencies to global vegetation dynamics

GIScience & Remote Sensing
The multi-frequency Vegetation Optical Depth (VOD), retrieved from microwave measurements, is crucial for monitoring vegetation water status and biomass at regional to global scales.
Runsheng Jing, Qian Cui, Tianjie Zhao, Huazhu Xue, Jingyao Zheng, Yu Bai, Wenjian Ni, Zhiqing Peng, Lu Hu, Yiwen Zhou, Mike Schwank, Nemesio J. Rodríguez-Fernández, Peng Guo, Xiaodong Gao, Feng Tian, Zushuai Wei, Lingkui Meng, Wenli Huang, Anmin Fu, Yang Lei, Jiancheng Shi   +20 more
doaj   +1 more source

Task‐Oriented Path Planning Towards Autonomous Sensor Network Deployment in Rainforest Canopies

Advanced Robotics Research, EarlyView.
An informative path planner for drone‐based deployment of wireless sensor networks in rainforest canopies is presented, addressing key challenges in large‐scale biodiversity monitoring. By integrating canopy surface detection with connectivity‐aware sampling under strict flight constraints, the approach enables efficient and reliable aerial sensor ...
Rita Santos Raminhos, Salua Hamaza
wiley   +1 more source

Soil Moisture Retrieval over a Vegetation-Covered Area Using ALOS-2 L-Band Synthetic Aperture Radar Data

Remote Sensing, 2021
Soil moisture (SM) plays a significant part in regional hydrological and meteorological systems throughout Earth. It is considered an indispensable state variable in earth science.
Ya Gao, Maofang Gao, Liguo Wang, Offer Rozenstein   +3 more
doaj   +1 more source