O bioma Amazonia apresenta elevadas taxas de desmatamento e queimadas, principalmente no entorno rodovias, como a BR-163 que atravessa municípios Novo Progresso Altamira. Tendo em vista necessidade mais estudos sobre as queimadas da Amazônia seus impactos, o objetivo deste artigo foi analisar severidade das ocorridas sudeste Amazônia, partir do cálculo índices espectrais imagens satélite Sentin...

The natural regeneration of ecosystems impacted by fires is a high priority in Bolivia, and represents one the country’s greatest environmental challenges. With abundance spatial data access to improved technologies, it critical provide an effective method analysis evaluate changes land use face global need understand dynamics vegetation processes. In this context, we evaluated through phenolog...

Areas affected by land degradation in Sub-Saharan West Africa between 1982 and 2012 are identified using time-series analysis of vegetation index data derived from satellites. The residual trend (RESTREND) of a Normalized Difference Vegetation Index (NDVI) time-series is defined as the fraction of the difference between the observed NDVI and the NDVI predicted from climate data. It has been wid...

Upscaling ecological information to larger scales in space and downscaling remote sensing observations or model simulations to finer scales remain grand challenges in Earth system science. Downscaling often involves inferring subgrid information from coarse-scale data, and such ill-posed problems are classically addressed using regularization. Here, we apply two-dimensional Tikhonov Regularizat...

Remote sensing (RS) data acquired by satellite have wide scope for agricultural applications owing to their synoptic and repetitive coverage. On the one hand, spectral indices deduced from visible and near-infrared RS data have been extensively used for crop characterization, biomass estimation and crop yield monitoring and forecasting. On the other hand, extensive research has been conducted u...

Frequent cloud cover is a major environmental constraint to optical remote sensing studies in Arctic locations, including studies based on ground or aircraft observations. The objective of this study was to determine how cloud induced variations in solar illumination a€ ect the normalized di€ erence vegetation index (NDVI) of representative vegetation types on the North Slope of Alaska. Illumin...

Efforts to estimate plant productivity using satellite data can be frustrated by the presence of cloud cover. We developed a new method to overcome this problem, focussing on the high-arctic archipelago of Svalbard where extensive cloud cover during the growing season can prevent plant productivity from being estimated over large areas. We used a field-based time-series (2000−2009) of live abov...