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Use of digital webcam images to track spring green-up in a deciduous broadleaf forest
Understanding relationships between canopy structure and the seasonal dynamics of photosynthetic uptake of CO2 by forest canopies requires improved knowledge of canopy phenology at eddy covarianceExpand
CO2 Balance of Boreal, Temperate, and Tropical Forests Derived from a Global Database
Terrestrial ecosystems sequester 2.1 Pg of atmospheric carbon annually. A large amount of the terrestrial sink is realized by forests. However, considerable uncertainties remain regarding the fate ofExpand
Sources of variability in canopy reflectance and the convergent properties of plants.
  • S. Ollinger
  • Environmental Science, Medicine
  • The New phytologist
  • 2011
How plants interact with sunlight is central to the existence of life and provides a window to the functioning of ecosystems. Although the basic properties of leaf spectra have been known forExpand
Near-surface remote sensing of spatial and temporal variation in canopy phenology.
There is a need to document how plant phenology is responding to global change factors, particularly warming trends. "Near-surface" remote sensing, using radiometric instruments or imaging sensors,Expand
Is Nitrogen Deposition Altering the Nitrogen Status of Northeastern Forests?
Abstract Concern is resurfacing in the United States over the long-term effects of excess nitrogen (N) deposition and mobility in the environment. We present here a new synthesis of existing dataExpand
Characterizing canopy biochemistry from imaging spectroscopy and its application to ecosystem studies
For two decades, remotely sensed data from imaging spectrometers have been used to estimate non-pigment biochemical constituents of vegetation, including water, nitrogen, cellulose, and lignin. ThisExpand
Predicting the effects of climate change on water yield and forest production in the northeastern United States
Rapid and simultaneous changes in temperature, precipitation and the atmospheric concentration of CO2 are predicted to occur over the next century. Simple, well-validated models of ecosystem functionExpand
Forest Ecosystems
Forests cover approximately 30% of the Earth’s land surface, account for over 75% of its standing biomass and house the majority of its biodiversity. Forests also play a critical role for humans, whoExpand
Modeling nitrogen saturation in forest ecosystems in response to land use and atmospheric deposition
Abstract A generalized, lumped-parameter model of carbon (C), water, and nitrogen (N) interactions in forest ecosystems (PnET-CN) is presented. The model operates at a monthly time step and at theExpand
Canopy nitrogen, carbon assimilation, and albedo in temperate and boreal forests: Functional relations and potential climate feedbacks
The availability of nitrogen represents a key constraint on carbon cycling in terrestrial ecosystems, and it is largely in this capacity that the role of N in the Earth's climate system has beenExpand