Results 1 to 10 of about 271 (118)

Global Monitoring of the Vegetation Dynamics from the Vegetation Optical Depth (VOD): A Review [PDF]

Remote Sensing, 2020
Vegetation is a key element in the energy, water and carbon balances over the land surfaces and is strongly impacted by climate change and anthropogenic effects. Remotely sensed observations are commonly used for the monitoring of vegetation dynamics and
Frédéric Frappart, Jean-Pierre Wigneron, Xiaojun Li, Xiangzhuo Liu, Amen Al-Yaari, Lei Fan, Mengjia Wang, Christophe Moisy, Erwan Le Masson, Zacharie Aoulad Lafkih, Clément Vallé, Bertrand Ygorra, Nicolas Baghdadi   +12 more
doaj   +5 more sources

An evaluation of SMOS L-band vegetation optical depth (L-VOD) data sets: high sensitivity of L-VOD to above-ground biomass in Africa [PDF]

Biogeosciences, 2018
The vegetation optical depth (VOD) measured at microwave frequencies is related to the vegetation water content and provides information complementary to visible/infrared vegetation indices.
N. J. Rodríguez-Fernández, A. Mialon, S. Mermoz, A. Bouvet, P. Richaume, A. Al Bitar, A. Al-Yaari, M. Brandt, T. Kaminski, T. Le Toan, Y. H. Kerr, J.-P. Wigneron   +11 more
doaj   +9 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   +3 more sources

Global L-band equivalent AI-based vegetation optical depth dataset [PDF]

Scientific Data
The L-band vegetation optical depth data garners significant interest for its ability to effectively monitor vegetation, thanks to minimal saturation within this frequency range.
Olya Skulovich, Xiaojun Li, Jean-Pierre Wigneron, Pierre Gentine   +3 more
doaj   +2 more sources

Crop monitoring with L-Band Vegetation Optical Depth (VOD): investigation in southeastern of Argentine Pampas

2023 XX Workshop on Information Processing and Control (RPIC), 2023
Fil: Rivas, Raúl Eduardo. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff". - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto de Hidrología de Llanuras "Dr. Eduardo Jorge Usunoff".

exaly   +3 more sources

Remote sensing of vegetation dynamics in drylands: Evaluating vegetation optical depth (VOD) using AVHRR NDVI and in situ green biomass data over West African Sahel [PDF]

Remote Sensing of Environment, 2016
Abstract Monitoring long-term biomass dynamics in drylands is of great importance for many environmental applications including land degradation and global carbon cycle modeling. Biomass has extensively been estimated based on the normalized difference vegetation index (NDVI) as a measure of the vegetation greenness. The vegetation optical depth (VOD)
Yi Liu, Aleixandre Verger, Martin Stefan Brandt   +2 more
exaly   +5 more sources

Global Unsupervised Assessment of Multifrequency Vegetation Optical Depth Sensitivity to Vegetation Cover

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Vegetation optical depth (VOD) has contributed to monitor vegetation dynamics and carbon stocks at different microwave frequencies. Nevertheless, there is a need to determine which are the appropriate frequencies to monitor different vegetation types ...
Claudia Olivares-Cabello, David Chaparro, Merce Vall-llossera, Adriano Camps, Carlos Lopez-Martinez   +4 more
doaj   +3 more sources

Error Propagation in Microwave Soil Moisture and Vegetation Optical Depth Retrievals [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Satellite soil moisture and vegetation optical depth [(VOD); related to the total vegetation water mass per unit area] are increasingly being used to study water relations in the soil-plant continuum across the globe.
Andrew Feldman, David Chaparro, Dara Entekhabi   +2 more
doaj   +2 more sources

IB-AGC: Annual 25 km global live biomass carbon product from SMOS L-band passive microwave vegetation optical depth [PDF]

Scientific Data
Monitoring aboveground biomass carbon (AGC) stocks and their changes is crucial for understanding the global carbon cycle and the impact of climate change.
Xiaojun Li, Philippe Ciais, Frédéric Frappart, Klaus Scipal, Lei Fan, Hui Yang, Clément Albergel, Xiangzhuo Liu, Yuqing Liu, Mengjia Wang, Huan Wang, Zanpin Xing, Aurelien De Truchis, Jean-Pierre Wigneron   +13 more
doaj   +2 more sources

How accurately does L band vegetation optical depth predict aboveground biomass?

International Journal of Applied Earth Observations and Geoinformation
L-band Vegetation Optical Depth (L-VOD) has emerged as a critical remote sensing proxy for monitoring global aboveground biomass (AGB) dynamics. Persistent methodological ambiguities, including the absence of standardized protocols for deriving AGB from ...
Yuan Zhang, Philippe Ciais, Jean-Pierre Wigneron, Jérôme Chave, Nan Cong, Xiaojun Li, Yan Yang, Sassan Saatchi   +7 more
doaj   +2 more sources