Jean-Pierre Wigneron

Nov 14, 2024 | nature.com | Martin Brandt |Sizhuo Li |Rasmus Fensholt |Jean-Pierre Wigneron

AbstractTrees contribute to carbon dioxide absorption through biomass, regulate the climate, support biodiversity, enhance soil, air and water quality, and offer economic and health benefits. Traditionally, tree monitoring on continental and global scales has focused on forest cover, whereas assessing biomass and species diversity, as well as trees outside closed-canopy forests, has been challenging.

Sep 12, 2024 | nature.com | Yu Feng |Philippe Ciais |Jean-Pierre Wigneron |Alan Ziegler |Dave van Wees |Dominick V. Spracklen | +4 more

AbstractTropical terrestrial ecosystems play an important role in modulating the global carbon balance. However, the complex dynamics and factors controlling tropical aboveground live biomass carbon (AGC) are not fully understood. Here, using remotely sensed observations, we find a moderate net AGC sink of 0.21 ± 0.06 PgC yr−1 throughout the global tropics from 2010 to 2020. This arises from a gross loss of −1.79 PgC yr−1 offset by a marked gain of 2.01 ± 0.06 PgC yr−1.

Sep 12, 2024 | nature.com | Yu Feng |Philippe Ciais |Jean-Pierre Wigneron |Alan Ziegler |Dave van Wees |Dominick V. Spracklen | +4 more

AbstractTropical terrestrial ecosystems play an important role in modulating the global carbon balance. However, the complex dynamics and factors controlling tropical aboveground live biomass carbon (AGC) are not fully understood. Here, using remotely sensed observations, we find a moderate net AGC sink of 0.21 ± 0.06 PgC yr−1 throughout the global tropics from 2010 to 2020. This arises from a gross loss of −1.79 PgC yr−1 offset by a marked gain of 2.01 ± 0.06 PgC yr−1.

Jul 16, 2024 | onlinelibrary.wiley.com | Lei Fan |Tianxiang Cui |Jean-Pierre Wigneron |Philippe Ciais

CONFLICT OF INTEREST STATEMENT The authors declare that they have no conflict of interest. Supporting Information Filename Description gcb17423-sup-0001-Supinfo.docxWord 2007 document , 15.9 MB Data S1. REFERENCES , , , , , , , , , , , , , , , , , , & (2015). The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink. Science, 348(6237), 895–899. https://doi.org/10.1126/science.aaa1668 , , , , , , & (2019).

Jul 10, 2024 | inria.hal.science | Lei Fan |Jean-Pierre Wigneron |Zhongbing Chang

Article Dans Une Revue Geo-spatial Information Science Année : 2024 Evaluation of optical and microwave-derived vegetation indices for monitoring aboveground biomass over China Mots clés Vegetation optical depth (VOD) Above Ground biomass (AGB) optical vegetation index L-VOD X-VOD Vegetation optical depth (VOD) AboveGround biomass (AGB) optical vegetation index L-VOD X- AboveGround biomass (AGB) X- Fichier principal Evaluation of optical and microwave-derived vegetation indices for monitoring...