Výsledky vyhledávání - "Wigneron, Jean Pierre"

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Global Estimates of L-band Vegetation Optical Depth and Soil Permittivity over Snow-covered Boreal Forests and Permafrost using SMAP Satellite Data

Autor: Kumawat, Divya, Ebtehaj, Ardeshir, Schwank, Mike, Wigneron, Jean-Pierre, Li, Xiaojun

This article expands the tau-omega model to properly simulate L-band microwave emission of the soil-snow-vegetation continuum through a closed-form solution of Maxwell's equations, considering the intervening dry snow layer as a loss-less medium. The

Externí odkaz: http://arxiv.org/abs/2307.07853

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Vision Transformers, a new approach for high-resolution and large-scale mapping of canopy heights

Autor: Fayad, Ibrahim, Ciais, Philippe, Schwartz, Martin, Wigneron, Jean-Pierre, Baghdadi, Nicolas, de Truchis, Aurélien, d'Aspremont, Alexandre, Frappart, Frederic, Saatchi, Sassan, Pellissier-Tanon, Agnes, Bazzi, Hassan

Accurate and timely monitoring of forest canopy heights is critical for assessing forest dynamics, biodiversity, carbon sequestration as well as forest degradation and deforestation. Recent advances in deep learning techniques, coupled with the vast

Externí odkaz: http://arxiv.org/abs/2304.11487

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High-resolution canopy height map in the Landes forest (France) based on GEDI, Sentinel-1, and Sentinel-2 data with a deep learning approach

Autor: Schwartz, Martin, Ciais, Philippe, Ottlé, Catherine, De Truchis, Aurelien, Vega, Cedric, Fayad, Ibrahim, Brandt, Martin, Fensholt, Rasmus, Baghdadi, Nicolas, Morneau, François, Morin, David, Guyon, Dominique, Dayau, Sylvia, Wigneron, Jean-Pierre

In intensively managed forests in Europe, where forests are divided into stands of small size and may show heterogeneity within stands, a high spatial resolution (10 - 20 meters) is arguably needed to capture the differences in canopy height. In this

Externí odkaz: http://arxiv.org/abs/2212.10265

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Carbon loss from forest degradation exceeds that from deforestation in the Brazilian Amazon

Autor: Qin, Yuanwei, Xiao, Xiangming, Wigneron, Jean-Pierre, Ciais, Philippe, Brandt, Martin, Fan, Lei, Li, Xiaojun, Crowell, Sean, Wu, Xiaocui, Doughty, Russell, Zhang, Yao, Liu, Fang, Sitch, Stephen, Moore III, Berrien

Spatial-temporal dynamics of aboveground biomass (AGB) and forest area affect the carbon cycle, climate, and biodiversity in the Brazilian Amazon. Here we investigate inter-annual changes of AGB and forest area by analyzing satellite-based annual AGB

Externí odkaz: http://arxiv.org/abs/2206.07363

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