Results 31 to 40 of about 5,842 (246)

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  

Modelling Forest Decline Using Smos Soil Moisture and Vegetation Optical Depth

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Global change is increasing the risk of forest decline worldwide, impacting carbon and water cycles. Hence, there is an urgent need for predicting forest decline occurrence. To that purpose, this study links forest decline events in Catalonia, detected by the DEBOSCAT forest monitoring program, with information from the Soil Moisture and Ocean Salinity
Chaparro Danon, David, Piles Guillem, Maria, Martínez Vilalta, Jordi, Vall-Llossera Ferran, Mercedes Magdalena, Vayreda, Jordi, Banque, Mireia, Camps Carmona, Adriano José   +6 more
openaire   +2 more sources

Retrieval of High-Resolution Vegetation Optical Depth from Sentinel-1 Data over a Grassland Region in the Heihe River Basin

Remote Sensing, 2022
Vegetation optical depth (VOD), as a microwave-based estimate of vegetation water and biomass content, is increasingly used to study the impact of global climate and environmental changes on vegetation.
Zhilan Zhou, Lei Fan, Gabrielle De Lannoy, Xiangzhuo Liu, Jian Peng, Xiaojing Bai, Frédéric Frappart, Nicolas Baghdadi, Zanpin Xing, Xiaojun Li, Mingguo Ma, Xin Li, Tao Che, Liying Geng, Jean-Pierre Wigneron   +14 more
doaj   +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

Droplet Electricity Generators With Maximized Energy Collection Zone Enabled by Aloe‐Inspired Midrib and Cuticle

Advanced Materials, EarlyView.
An Aloe‐pinspired droplet electricity generator (A‐DEG) overcomes the limited energy collection zone of conventional DEGs by guiding impact droplets through a channeling midrib and artificial cuticle. The channeling midrib induces uni‐directional droplet spreading, while the artificial cuticle on the midrib further reinforces this behavior through its ...
Gibeom Lee, Eunbyeol Kim, Kyongtae Choi, Minjun Song, Sunmin Jang, Dongwhi Choi, Donghyun Seo, Min‐Gyu Lee, Younghoon Lee   +8 more
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

Dual‐Functional Ingestible Passive Capsules for High‐Throughput Intestinal Sampling with Sealed Containment and Targeted Drug Delivery

Advanced Robotics Research, EarlyView.
To address challenges in high‐throughput intestinal sampling with sealed containment and target drug delivery, we developed a dual‐functional ingestible passive capsule with a dual‐triggered control system based on pH‐response and mechanical actuation.
Libing Huang, Houyu Ling, Xizong Chen, Yufei Duan, Yu Liu, Shuntian Cai, Yandan Ren, Wenlong Li, Lei Ren, Miao Wang   +9 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

Soil moisture and vegetation optical depth retrievals over heterogeneous scenes using LEWIS L-band radiometer

International Journal of Applied Earth Observations and Geoinformation, 2021
The Soil Moisture and Ocean Salinity (SMOS) satellite has been providing global data for more than 11 years. The algorithm to retrieve surface soil moisture (SM) and vegetation optical depth (VOD) from Brightness Temperatures (TB) has constantly evolved ...
M. Barrée, A. Mialon, T. Pellarin, M. Parrens, R. Biron, F. Lemaître, S. Gascoin, Y.H. Kerr   +7 more
doaj   +1 more source

Water‐Efficient Smart Drip Irrigation Enabled by a Low‐Power and High‐Efficiency Flexible Electromagnetic Actuator

Advanced Science, EarlyView.
Water scarcity poses a critical threat to global food security. A low‐power, flexible electromagnetic actuator is presented for smart drip irrigation systems. The device achieves precise, wide‐range flow modulation (0.05–5.8 mL/min) in response to real‐time plant demands, reducing water consumption compared to conventional flood irrigation.
Duo Chen, Xubin Zhu, Minwei Zhang, Kerui Li, Qinghong Zhang, Yaogang Li, Chengyi Hou, Hongzhi Wang   +7 more
wiley   +1 more source