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Nitrogen Cycles: Past, Present, and Future
This paper contrasts the natural and anthropogenic controls on the conversion of unreactive N2 to more reactive forms of nitrogen (Nr). A variety of data sets are used to construct global N budgetsExpand
Global Consequences of Land Use
Land use has generally been considered a local environmental issue, but it is becoming a force of global importance. Worldwide changes to forests, farmlands, waterways, and air are being driven byExpand
PROSPECT+SAIL models: A review of use for vegetation characterization
The combined PROSPECT leaf optical properties model and SAIL canopy bidirectional reflectance model, also referred to as PROSAIL, has been used for about sixteen years to study plant canopy spectralExpand
Biophysical and Biochemical Sources of Variability in Canopy Reflectance
  • G. Asner
  • Environmental Science
  • 1 June 1998
Abstract Analyses of various biophysical and biochemical factors affecting plant canopy reflectance have been carried out over the past few decades, yet the relative importance of these factors hasExpand
The velocity of climate change
The ranges of plants and animals are moving in response to recent changes in climate. As temperatures rise, ecosystems with ‘nowhere to go’, such as mountains, are considered to be more threatened.Expand
Global synthesis of leaf area index observations: implications for ecological and remote sensing studies
Aim We present the first global synthesis of plant canopy leaf area index (LAI) measurements from more than 1000 published estimates representing ∼ 400 unique field sites. LAI is a key variable forExpand
PROSPECT-4 and 5: Advances in the leaf optical properties model separating photosynthetic pigments
Abstract The PROSPECT leaf optical model has, to date, combined the effects of photosynthetic pigments, but a finer discrimination among the key pigments is important for physiological and ecologicalExpand
Selective Logging in the Brazilian Amazon
Amazon deforestation has been measured by remote sensing for three decades. In comparison, selective logging has been mostly invisible to satellites. We developed a large-scale, high-resolution,Expand
▪ Abstract Managed grazing covers more than 25% of the global land surface and has a larger geographic extent than any other form of land use. Grazing systems persist under marginal bioclimatic andExpand
High-resolution forest carbon stocks and emissions in the Amazon
Efforts to mitigate climate change through the Reduced Emissions from Deforestation and Degradation (REDD) depend on mapping and monitoring of tropical forest carbon stocks and emissions over largeExpand